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InstaWerk is Europe's leading procurement platform for CNC-machined parts. With a focus on quality we deliver CNC-components worldwide. Our instant quoting online service and exclusive manufacturing network make ordering of CNC-machined parts convenient and efficient.

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Wide selection of different materials for CNC machining:

  • Aluminum alloys
  • Structural steels, case-hardening steels, tool steels, stainless steels, heat-treatable steels
  • Titanium alloys
  • Various plastics, such as POM, PEEK, Delrin, …
  • Copper, brass, bronze
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90+ materials online – and all others upon request

Selecting the right material can be crucial to the success or failure of a technical design. At the same time, the sheer variety of available materials is overwhelming. To help you choose the right materials for your turned and  milled parts , we have compiled an overview of common materials below .

At InstaWerk, we’ve decided to offer common materials online and deliberately reduce the variety. This allows us to offer the best conditions for widely available materials,  while also responding to specific material requirements through  individual inquiry options .

Directly to the right materials:  Aluminum –  Steels –  Titanium –  Plastics



Aluminum alloys

More information about aluminum milling | Other aluminum alloys are available  upon request .

AlMg4.5Mn – EN AW-5083 (peraluminum) – 3.3547

Density 2.8 kg/dm³

  • Excellent machinability and therefore cost-effective in turning and milling parts.
  • Good corrosion resistance and medium strength (yield strength of approx. 240 N/mm² in condition T6)
  • List itemEasily weldable
  • List iLower strength compared to EN AW 7075
    tem
  • Lower strength compared to other aluminum alloys
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AlMgSi1 – EN AW-6082 (Anticorodal) – 3.2315

Density 2.8 kg/dm³

  • Very good resistance to corrosion
  • High thermal conductivity
  • Very good weldability
  • Strength properties superior to AW-5083
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AlZn5.5MgCu – EN AW-7075 (Ergal) – 3.4365

Density 2.8 kg/dm³

  • Compared to other aluminum alloys, AW-7075 exhibits very high strength when hardened.
  • It is more commonly used for structurally stressed components that do not yet require the strength of steels.
  • It polishes very well and is therefore often used for tools.
  • List iLower strength compared to EN AW 7075
    tem
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AlMg1SiCu – EN AW-6061 – 3.3211

Density 2.8 kg/dm³

  • Excellent machinability and therefore cost-effective in turning and milling parts.
  • Good corrosion resistance and medium strength (yield strength of approx. 240 N/mm² in condition T6)
  • Easily weldable
  • Lower strength compared to EN AW 7075
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AlMg0.7Si – EN AW-6063 – 3.3206

Density 2.7 kg/dm³

  • Suitable for applications with low strength requirements.
  • Very good surface quality
  • Easily weldable
  • Well suited for anodizing, also for decorative purposes
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AlMg2.5 – EN AW-5052 – 3.3523

Density 2.7 kg/dm³

  • Medium surface quality achievable
  • Good corrosion resistance
  • Easily weldable
  • Cheap aluminum alloy
  • The alloy is not suitable for decorative or technical anodizing.
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Aluminium EN AW-2024 | 3.1355 | AlCu4Mg1

Density 2.78 kg/dm³

  • High strength
  • Good machinability
  • The alloy is not suitable for decorative or technical anodizing.
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Aluminium EN AW-2017A | 3.1325 | AlCuMg1

Density 2.79 kg/dm³

  • Good strength
  • Good machinability
  • The alloy is not suitable for decorative or technical anodizing.
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AlCuMgPb – EN AW-2007 – 3.1645

Density 2.85 kg/dm³

  • It is primarily used for automatic turning parts.
  • Very easy to machine and erode
  • Very good weather and corrosion resistance
  • Not suitable for welding
  • Not recommended for decorative anodizing
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AlMg3 – EN AW-5754 – 3.3535

Density 2.66 kg/dm³

  • Excellent anodizing properties
  • Very good weldability
  • Relatively inexpensive
  • Lower strength
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AlMgSi0.5 – EN AW-6060 – 3.3206

Density 2.70 kg/dm³

  • Very good anodizable properties
  • Very good surface quality
  • Good weldability, except for resistance welding.
  • Lower strength
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Aluminium EN AW-7021 | – | AlZn5.5Mg1.5

Density 2.80 kg/dm³

  • High strength
  • Good dimensional stability for precise milled parts
  • Corrosion resistance below that of 5xxx and 6xxx alloys
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Aluminium EN AW-7019 | 3.4325 | ALZn4Mg2Mn

Density 2.75 kg/dm³

  • High strength
  • Low residual stresses in suitable plate grades
  • Well suited for precise milled components
  • Corrosion resistance below that of 5xxx and 6xxx alloys
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Aluminium EN AW-7022 | 3.4345 | AlZn5Mg3Cu (AlZnMgCu0.5)

ca. 2.78 kg/dm³

  • Very High strength
  • Well suited for highly loaded precision parts
  • Corrosion resistance and weldability are inferior to 5xxx and 6xxx alloys
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Aluminium EN AW-7020 | 3.4335 | AlZn4.5Mg1

ca. 2.77 kg/dm³

  • High strength
  • Low weight
  • Better weldability than many other high-strength 7xxx alloys
  • Corrosion resistance below that of classic AlMg alloys
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AlMg4.5Mn – EN AW-5083 (peraluminum) – 3.3547

Density 2.8 kg/dm³

  • Excellent machinability and therefore cost-effective in turning and milling parts.
  • Good corrosion resistance and medium strength (yield strength of approx. 240 N/mm² in condition T6)
  • List itemEasily weldable
  • List iLower strength compared to EN AW 7075
    tem
  • Lower strength compared to other aluminum alloys
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Steel and stainless steel alloys.
Other alloys are available upon request .

S235JR – St 37-2 – 1.0038

Density 7.9 kg/dm³

  • S235JR is an unalloyed structural steel that is used for structural components due to its mechanical properties.
  • Moderate durability for use
  • Good weldability
  • High strength with a minimum yield strength of 235 N/mm².
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S355J2+N – ST 52-3 – 1.0570

Density 7.9 kg/dm³

  • S355J2 is an unalloyed structural steel which, due to its slightly enhanced properties, is used for structural components (e.g. in mechanical engineering).
  • Good machinability
  • High strength with a minimum yield strength of 355 N/mm² for thicknesses below 16mm.
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C45 steel – AISI 1045 – 1.0503

Density 7.9 kg/dm³

  • Unalloyed heat-treatable steel for subsequent hardening and tempering
  • High strength and wear resistance combined with high toughness
  • Due to the high carbon content, it can only be welded with appropriate precautions.
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X5CrNi18-10 – Stainless steel V2A – AISI 304 – 1.4301

Density 7.9 kg/dm³

  • Weldable and polishable
  • High corrosion and chemical resistance (acids, salt water may be critical)
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X2CrNiMo17-12-2 – Stainless steel V4A – AISI 316 – 1.4401

Density 7.9 kg/dm³

  • Weldable and polishable
  • Even greater resistance to corrosion and chemicals
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X8CrNiS18-9 – Stainless steel AISI 303 – 1.4305

Density 7.9 kg/dm³

  • High strength and hardness
  • Good corrosion resistance
  • Low corrosion resistance compared to other stainless steels
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X2CrNiMo17-12-2 – Stainless steel AISI 316L – 1.4404

Density 7.9 kg/dm³

  • Austenitic stainless steel with good acid resistance, often used in chemical plant construction=
  • Good heat resistance
  • High corrosion resistance
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X6CrNiMoTi17-12-2 – Stainless steel AISI 316Ti – 1.4571

Density 8.0 kg/dm³

  • Similar properties to stainless steel 1.4404 but with higher corrosion resistance
  • Very good corrosion resistance
  • Very good weldability
  • Also usable at high temperatures up to 550°C
  • Suitable for use in extremely low temperatures
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16MnCr5 – Case-hardening steel AISI 5115 – EC80 – 1.7131

Density 7.8 kg/dm³

  • 16MnCr5 is a chromium-manganese alloyed case-hardening steel.
  • Highly wear-resistant and tough, making it particularly suitable for components subject to wear.
  • Etchable, polishable, nitridable, weldable, case-hardenable
  • Well suited for highly stressed components used in automotive and gearbox manufacturing as well as in general mechanical engineering.
  • Not suitable for welding
  • Not recommended for decorative anodizing
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X20Cr13 –
Stainless steel AISI 420 –
1.4021

Density 7.9 kg/dm³

  • Good resistance to corrosion, except in seawater environments
  • Very good mechanical properties
  • Martensitic chromium steel, through hardening processes, can achieve a higher degree of work hardening and magnetism.
  • Excellent polishing properties up to a high gloss
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40CrMnNiMo8-6 – Tool steel MCMS – 1.2312

Density 7.9 kg/dm³

  • The tool steel 40CrMnNiMo8-6 is particularly suitable for tools with medium loads, such as those used in composite manufacturing, thermoforming or other plastic manufacturing processes.
  • Good machinability
  • High strength
  • Very high dimensional stability
  • Moderate polishability
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42CrMo(S)4 – Quenched and tempered steel 4140 – 1.7227

Density 7.9 kg/dm³

  • It is mainly used in automotive engineering and mechanical engineering.
  • Versatile
  • Very high strength combined with high toughness
  • Medium to poor weldability
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11SMn30/9SMn28 – free cutting steel 1215/1213 – 1.0715

Density 7.9 kg/dm³

  • The free-cutting steel 11SMn30 / 9SMn28 is primarily used in machining centers for series production using automatic lathes.
  • Very good machinability
  • Low wear and tear
  • Good surface quality
  • Not usually intended for heat treatment
  • Welding of free-cutting steels is not recommended due to their high sulfur and phosphorus content.
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9SMnPb36 –
free cutting steel 12L14 – 1.0737

Density 7.9 kg/dm³

  • The free-cutting steel 11SMn30 / 9SMn28 is primarily used in machining centers for series production using automatic lathes.
  • Very good machinability
  • Low wear and tear
  • Good surface quality
  • Not usually intended for heat treatment
  • Welding of free-cutting steels is not recommended due to their high sulfur and phosphorus content.
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Automatenstahl AISI 1213/1215 | 1.0715 | 11SMn30/9SMn28

Density 7.85 kg/dm³

  • Very good machinability
  • Good chip formation
  • Limited weldability
  • Corrosion protection required
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Automatenstahl AISI 12L14 | 1.0737 | 9SMnPb36

Density 7.85 kg/dm³

  • Very good machinability
  • Very good chip breaking
  • Contains lead and is therefore not always permissible from a regulatory standpoint
  • Corrosion protection required
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Stainless stee 304 (V2A) | 1.4301 | X5CrNi18-10

Density 7.9 kg/dm³

  • Good corrosion resistance
  • Highly versatile
  • Tends to work harden
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Stainless steel 316 (V4A) | 1.4401 | X5CrNiMo17-12-2

Density 8.0 kg/dm³

  • Very good corrosion resistance
  • Better suited for chemically
  • more demanding media than 304
  • More difficult to machine than standard steels
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Stainless steel 303 | 1.4305 | X8CrNiS18-9

Density 7.9 kg/dm³

  • Hardenable
  • Well suited for wear-loaded stainless steel parts
  • Corrosion resistance below that of austenitic stainless steels
  • Properties depend strongly on heat treatment
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Stainless steel AISI 316L | 1.4404 | X2CrNiMo17-12-2

Density 8.0 kg/dm³

  • Very good corrosion resistance
  • Well suited for corrosive environments and welded constructions
  • More difficult to machine than 303
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Stainless steel AISI 420| 1.2083/1.4021/1.4031/1.4034 | X42Cr13/X20Cr13/X39Cr13/X46Cr13

Density 7.8 kg/dm³

  • Hardenable
  • Well suited for wear-loaded stainless steel parts
  • Corrosion resistance below that of austenitic stainless steels
  • Properties depend strongly on heat treatment
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Stainless steel AISI 316Ti | 1.4571 | X6CrNiMoTi17-12-2

Density 8.0 kg/dm³

  • Very good corrosion resistance
  • Well suited for more thermally and chemically demanding applications
  • More difficult to machine
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Stainless steel AISI 314 | 1.4841 | X15CrNiSi25-21

ca. 7.8 kg/dm³

  • Very good high-temperature strength
  • Good scaling resistance
  • Usually unnecessarily demanding and difficult to machine for standard CNC parts
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Stainless steel AISI 630 | 1.4542 | X5CrNiCuNb16-4

Density 7.8 kg/dm³

  • Very high strength
  • Good corrosion resistance compared with many high-strength steels
  • Machinability depends strongly on condition and heat treatment
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Case-hardening steel AISI 5115 | 1.7131 | 16MnCr5

Density 7.85 kg/dm³

  • Well suited for gears and wear parts
  • Tough core after appropriate heat treatment
  • Full performance is only achieved after heat treatment
  • Corrosion protection required
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Stahl AISI 1045 (C45) | 1.0503 | C45

Density 7.85 kg/dm³

  • Good strength
  • Economical and readily available
  • Corrosion protection usually required
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Stahl S235JR | 1.0038 | St 37-2/Q235B

Density 7.85 kg/dm³

  • Cost-effective
  • Very widely available
  • Relatively low strength
  • Corrosion protection usually required
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Stahl S355J2G3 | 1.0570 | St52-3/Q345D

Density 7.85 kg/dm³

  • Higher strength than S235
  • Economical for robust steel components
  • Corrosion protection usually required
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Heat-treatable steel AISI 4140 (+S) +QT | 1.7225/1.7227 | 42CrMo(S)4 +QT

Density 7.85 kg/dm³

  • High strength and good toughness
  • Well suited for highly loaded shafts. axles. and machine components
  • Corrosion protection usually requirede demanding to machine in the quenched and tempered condition
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Heat-treatable steel AISI 4140 (+S) | 1.7225/1.7227 | 42CrMo(S)4

Density 7.85 kg/dm³

  • High strength and good toughness
  • Well suited for highly loaded mechanical engineering components
  • Corrosion protection usually required
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Tool steel AISI P20 | 1.2311/1.2312 | 40CrMnMo7/40CrMnMoS8-6

Density 7.85 kg/dm³

  • Very good machinability
  • Pre-hardened condition reduces post-treatment effort
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Tool steel AISI D2 | 1.2379 | X155CrVMo12-1

Density 7.70 kg/dm³

  • Very high wear resistance
  • High hardness
  • Limited toughness compared with many other tool steels
  • Machining is demanding
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Tool steel AISI O2 | 1.2842 | 90MnCrV8

ca. 7.8 kg/dm³

  • Good machinability in the soft-annealed condition
  • Good wear resistance
  • Corrosion protection required
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Tool steel AISI P20 | 1.2312 | 40CrMnMoS8-6

ca. 7.85 kg/dm³

  • Very good machinability
  • Pre-hardened condition reduces post-treatment effort
  • Usually less suitable than 1.2311 for the highest polish grades
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Tool steel AISI H11 | 1.2343 | X37CrMoV5-1

ca. 7.8 kg/dm³

  • Good hot strength
  • High toughness
  • Well suited for tools under cyclic thermal loading
  • Usually unnecessarily high-grade for standard components
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Titanium alloys available online.

Other alloys are available  upon request .


Titanium 3.7035 – Grade 2 “Ti 2”

Density 4.51 kg/dm³

  • Unalloyed titanium (“pure titanium”) with good corrosion resistance
  • Good mechanical properties
  • High impact strength
  • High strength with a minimum yield strength of 235 N/mm².
  • Machining is demanding
  • Lower strength than Titanium Grade 5
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Titan Grade 5 – 3.7164 – Ti6Al4V

Density 4.45 kg/dm³

  • Very high specific strength
  • Very good corrosion resistance
  • Very high material and machining cost
  • Machining is demanding
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Available plastics in the online configurator.

Other plastics are available  upon request .


Polytetrafluoroethylene (PTFE) – Teflon®

Density 2.2 kg/dm³

  • Barely adhesive surface
  • Excellent gliding properties
  • Excellent electrical properties
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Polyoxymethylene (POM-C) – Delrin®

Density 1.4 kg/dm³

  • High strength
  • High hardness
  • Good surface quality
  • Good sliding properties
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Polyetheretherketone (PEEK)

Density 1.3 kg/dm³

  • High-performance plastic
  • Excellent chemical resistance
  • Very high operating temperature above 200°C
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Polyamide 6 – (PA 6) Nylon

Density 1.5 kg/dm³

  • Crystalline standard plastic
  • High wear resistance
  • Good chemical resistance, especially to pH fluctuations under changing temperatures and solvents.
  • Water absorption up to 7% – more suitable for simpler contours
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Polyamide glass fiber reinforced – PA 66-GF30

Density 1.4 kg/dm³

  • Increased strength through fiberglass reinforcement
  • Low moisture absorption up to 3.5%
  • Good heat resistance
  • Higher costs in the mid-range compared to unreinforced PA6
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Polyethylene – PE 300 (PE-HD)

Density 0.9 kg/dm³

  • Inexpensive standard plastic, for example for structural components in chemical apparatus and plant construction
  • Low density
  • Excellent chemical resistance
  • Lower strength and stiffness than PP
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Polyethylene – PE 1000 (PE-UHMW)

Density 0.9 kg/dm³

  • Polyethylene type with the highest molecular weight, especially for structural components in general mechanical engineering
  • Excellent abrasion resistance and sliding properties due to self-lubrication
  • Very high toughness
  • Dimensional stability at very low temperatures down to -200°C
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Acrylonitrile butadiene styrene (ABS)

Density 1.0 kg/dm³

  • High toughness
  • Excellent dimensional stability up to 100°C
  • Low water absorption
  • Good stress crack resistance
  • High mechanical damping
  • Lower strength and stiffness than PP
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Polypropylene (PP)

Density 1.8 kg/dm³

  • Versatile standard plastic
  • Good chemical resistance
  • Low density
  • Very good impact resistance
  • High mechanical damping
  • Lower strength and stiffness than PP
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Polyvinylidene fluoride (PVDF)

Density 1.8 kg/dm³

  • It possesses the best mechanical properties of all unfilled fluoropolymers.
  • Very easy to machine
  • High thermal resistance
  • Very good chemical resistance
  • “When fluoropolymers are heated, harmful substances are released. Appropriate safety precautions (e.g., respiratory protection) must be taken.”
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Polymethyl methacrylate (PMMA)

Density 2.2 kg/dm³

  • Transparent plastic with very good resistance to yellowing due to high UV resistance.
  • High hardness, strength and stiffness
  • Good electrical and dielectric properties
  • Physiologically harmless
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Polyethylene terephthalate (PET)

Density 1.4 kg/dm³

  • Especially suitable for complex geometries and tight tolerances (e.g. bearings, gears, couplings).
  • Temperature resistance up to +100°C
  • Good electrical properties
  • Physiologically harmless
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Polycarbonate (PC)

Density 1.2 kg/dm³

  • Transparent plastic in the mid-price segment, e.g. for machine safety glazing
  • High strength and hardness
  • Very high impact strength with elongation at break over 80%
  • Temperature resistance up to +135°C
  • Limited transparency and weather resistance compared to PMMA
  • moisture absorption
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Polyvinyl chloride (PVC-U)

Density 1.2 kg/dm³

  • Inexpensive standard plastic with good flammability properties
  • Good chemical resistance
  • Good sliding properties
  • High strength and stiffness
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PA 6 (Nylon) – Polyamid

Density 1.15 kg/dm³

  • Good strength and toughness
  • Good sliding and wear properties
  • Moisture absorption can affect dimensional stability
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PA 66-GF30 – Polyamid 66 Glass Fiber Reinforced- Natur Natural (Ivory)

Density 1.35 kg/dm³

  • High stiffness
  • Improved heat deflection resistance compared to unfilled PA
  • More abrasive to tools than unfilled plastics
  • Fiber orientation can cause anisotropic properties
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PC  – Polycarbonat  – Transparent

Density 1.20 kg/dm³

  • Very high impact strength
  • Good transparency
  • More scratch-sensitive than PMMA
    Limited chemical resistance
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PE 300 (PE-HD) – Polyethylen 

Density 0.95 kg/dm³

  • Good chemical resistance
  • Very good toughness
  • Only conditionally suitable for tight tolerances
  • Low stiffness
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POM-C ESD – Polyoxymethylen ESD – Color not specified

ca. 1.34-1.42  kg/dm³

  • Good dimensional stability
  • Good sliding and wear properties
  • ESD suitability for corresponding applications
  • Electrical properties are grade-dependent and not comparable to highly conductive materials
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PP-GF40 – Polypropylene Glass Fiber Reinforced – Color not specified

ca. 1.20 kg/dm³

  • Significantly higher stiffness than unfilled PP
  • Low weight
  • More abrasive to tools than unfilled plastics
  • Fiber orientation can cause anisotropic properties
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PTFE (z. B. Teflon) – Polytetrafluorethylen

Density 2.15-2.20 kg/dm³

  • Very low friction
  • Very high chemical resistance
  • Low stiffness
  • Prone to creep under load
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PVDF – Polyvinylidenfluorid –

Density 1.75 kg/dm³

  • Very good chemical resistance
  • Good temperature resistance for a plastic
  • Significantly more expensive than standard plastics
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Available alloys include copper, brass, and bronze (non-ferrous metals).

Other alloys for your turned/milled parts are available  upon request .


Copper Cu-ETP –
2.0065 – T2

Density 8.9 kg/dm³

  • High electrical conductivity (pure copper content of over 99.9%)
  • Strengths between 230-290 N/mm²
  • Also known as E-copper or CW004A
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Free cutting brass CuZn39Pb3 – 2.0401 – HPb59-3

Density 8.4 kg/dm³

  • Very good sliding properties
  • Most commonly used non-ferrous metal for machining
  • Also known as MS58 or CW614N
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Free cutting brass CuZn40Pb2 – 2.0402 – HPb59-3

Density 8.4 kg/dm³

  • Very good sliding properties
  • Good corrosion resistance
  • Also known as CW617N
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Brass CuZn40 – 2.0360 – H59/H62

Density 8.4 kg/dm³

  • Lead-free brass alloy
  • Good mechanical properties
  • Also known as CW509L
  • Water absorption up to 7% – more suitable for simpler contours
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Bronze CuSn8 – 2.1030 – QSn8-0.3

Density 8.8 kg/dm³

  • Good sliding properties
  • High strength and spring properties
  • Also known as CW453
  • Higher costs in the mid-range compared to unreinforced PA6
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Bronze CuSn12-C – 2.1052 – CuSn12

Density 8.7 kg/dm³

  • Highly wear-resistant and tough
  • Good corrosion resistance
  • Also known as CC483K
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Rotguss EN CC493K (RG7)  – 2.1090  – CuSn7Zn4Pb7

Density 8.9 kg/dm³

  • Good emergency running properties
  • Good machinability
  • Contains lead and is therefore not always permissible from a regulatory standpoint
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