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CNC Machining Materials | Steel, Stainless Steel, Alu | Page 3 of 5 | Xometry India

CNC Machining

Aluminium
Aluminium 3.4365
CNC Machining
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Key Features: High strength • Tough • Resistant to fatigue • Excellent machinability

Aluminium 3.4365/EN-AW7075 has high strength (57MPa), toughness and excellent resistance to fatigue. It has very good machinability.
Aluminium 3.3211
CNC Machining
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Key Features: High strength • Good weldability

Aluminium 3.3211/EN-AW6061 contains magnesium and silicon as its major alloying elements with trace amounts of copper.
Aluminium 3.3206
CNC Machining
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Key Features: Low strength • Heat treatable • Good weldability • Good corrosion resistance

Aluminium 3.3206/EN-AW6060 has good resistance to corrosion, good weldability and very suitable for cold forming.
Aluminium Alloy 6082
CNC Machining
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Key Features: Good thermal conductivity • High stress corrosion cracking resistance

Typically formed by rolling and extrusion, Aluminium 3.2315 has medium strength with very good weldability and thermal conductivity.
Aluminium Alloy 5083
CNC Machining
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Key Features: Moderate strength • Good machinability

Aluminium 3.3547 / EN AW-5083 is a rolled plate with moderate strength. It is widely used in the capital goods industry.
Steel
SKD11-Steel
CNC Machining
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Key Features: 1. Exceptional wear resistance (strengthened by chromium, molybdenum, and vanadium carbides) 2. Excellent hardenability (it can be hardened by air cooling) 3. Stable heat treatment performance (minimal distortion) 4. High compressive strength (ideal for punching and molding dies)
S136-Steel
CNC Machining
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Key Features: 1. Exceptional corrosion resistance (it is comparable to 420 stainless steel) 2. Ultra-mirror polishability (it is free from inclusions and porosity) 3. Excellent wear resistance (which is further improved after heat treatment) 4. Low deformation during heat treatment (it is suitable for precision molds)
SKD61-Steel
CNC Machining
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Key Features: 1. Excellent high-temperature strength (it maintains high hardness even at 600°C) 2. Outstanding thermal fatigue resistance (it is resistant to cracking from thermal cycling) 3. Good temper resistance (stable hardness under high temperatures) 4. Moderate toughness (superior to cold-work steels, like SKD11)
40Cr-Steel
CNC Machining
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Key Features: 1. High strength and toughness (tensile strength ≥ 980 MPa after quenching and tempering) 2. Good hardenability (chromium enhances heat treatment performance) 3. Moderate wear resistance (which can be improved through surface hardening) 4. Preheating required for welding (prone to cold cracking)
NAK 80-Steel
CNC Machining
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Key Features: 1. Ultra-mirror polishability (achieving polishing grade above #15000) 2. High wear resistance (alloyed with copper and nickel, extending the mold service life) 3. Good texturing performance (suitable for detailed patterning) 4. Supplied in the pre-hardened status (eliminating the need for heat treatment, and reducing deformation risks)
Mold Steel 718-Steel
CNC Machining
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Key Features: 1. Excellent machinability (it can be directly machined in the pre-hardened condition) 2. High polishability (it can achieve mirror finish, suitable for high-gloss molds) 3. Good wear resistance and toughness 4. Uniform microstructure (nickel improves overall performance)
S50C-Steel
CNC Machining
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Key Features: 1. High hardness and wear resistance (suitable for enhanced heat treatment) 2. Good machinability (especially in the annealed condition) 3. Limited weldability (preheating and post-weld heat treatment required) 4. High strength, suitable for parts subjected to heavy loads
S45C
CNC Machining
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Key Features: High tensile strength • Low ductility • Low thermal conductivity

Steel 1.0503 (C45) has low thermal conductivity and low ductility among wrought carbon steels. It has a high tensile strength of 630MPa.
Steel 1.7225
CNC Machining
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Key Features: High strength • Tough • Resistance to impact

Steel 1.7225 has high strength, toughness, good hardenability and resistance to impact. It is widely used in the construction of machines
Q235A
CNC Machining
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Key Features: Good plasticity •​ Tough ​•​ Good weldability

Steel 1.0038 can be formed into many products. Its excellent weldability makes it to be widely used in bridges, transmission towers etc.
Stainless steel
Stainless Steel2205
CNC Machining
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Key Features: 1. High strength (yield strength is around twice that of 304 stainless steel) 2. Excellent corrosion resistance (resistant to seawater and acidic media) 3. Superior resistance to stress corrosion cracking (better than 304/316) 4. Good weldability
Cr12-Stainless Steel
CNC Machining
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Key Features: 1. Extremely high wear resistance (reinforced by high-chromium carbides) 2. Excellent hardenability (uniform hardening even in large cross-sections) 3. Minimal heat treatment deformation (suitable for precision molds) 4. High compressive strength (good resistance to impact fatigue)
Stainless Steel 17-4PH / 1.4542 / X5CrNiCuNb16-4
CNC Machining
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Key Features: Stiffness·Corrosion resistance·Chemical resistance·Properties can be enhanced withheat treatment (annealing)
Stainless Steel 316L / 1.4404 / X2CrNiMo17-12-2
CNC Machining
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Key Features: Stiffness ·Corrosion resistance ·Highductility and toughness ·Properties can beenhanced with heat-treatment
SUS 304
CNC Machining
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Key Features: Excellent corrosion resistance • Low thermal conductivity • Good machinability
Stainless Steel 303 / 1.4305 / X10CrNiS18-9
CNC Machining
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Key Features: High strength • Good machinability • Ductility • Low corrosion resistance
Copper
H96-Copper
CNC Machining
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Key Features: 1. Excellent electrical and thermal conductivity (comparable to pure copper, electrical conductivity ≥ 90% IACS) 2. Outstanding corrosion resistance (resistant to atmospheric and seawater corrosion, and dezincification) 3. Good plasticity (suitable for complex molding) 4. Relatively low strength (tensile strength ≥ 250 MPa)
Beryllium Copper-Copper
CNC Machining
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Key Features: 1. Ultra-high strength (tensile strength up to 1,400 MPa after aging) 2. Excellent electrical and thermal conductivity (20–60% IACS) 3. Non-magnetic and spark-resistance (suitable for flammable/explosive environments) 4. Fatigue and corrosion resistance (long-term stability in performance)
H56-Copper
CNC Machining
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Key Features: 1. High strength and hardness (tensile strength ≥400MPa) 2. Excellent plasticity (suitable for complex cold molding) 3. Low cost (high zinc content provides economic benefits) 4. Atmospheric corrosion resistance (prone to dezincification; it is not suitable for acidic environments)
H69-Copper
CNC Machining
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Key Features: 1. High strength and hardness (tensile strength ≥ 350 MPa) 2. Excellent cold workability (suitable for deep drawing and complex molding) 3. Good electrical and thermal conductivity (about 28% of pure copper) 4. Cost-effective (cheaper than high-copper brass)
H62-Copper
CNC Machining
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Key Features: 1. Excellent plasticity (good cold and hot workability) 2. Relatively high strength (tensile strength ≥ 300 MPa) 3. Good electrical and thermal conductivity (about 30% of pure copper) 4. Resistant to atmospheric corrosion (but not resistant to dezincification or acidic media)
Brass
Brass Ms58 / 2.0401 / CuZn39Pb3
CNC Machining
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Key Features: Excellent hot formability • Good machinability
Titanium
TC5-Titanium
CNC Machining
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Key Features: 1. Moderate strength (tensile strength ≥ 850 MPa) 2. Good thermal stability (resistant to temperatures below 400°C) 3. Excellent corrosion resistance (resistant to seawater, and acidic and alkaline environments) 4. Good weldability (better than TC4)
TC4-Titanium
CNC Machining
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Key Features: 1. Ultra-high strength-to-weight ratio (strength up to 900 MPa, and density only 4.43 g/cm³) 2. Excellent corrosion resistance (resistant to seawater, acids, and alkalis); 3. Good thermal stability (it withstands temperatures at 300–500°C); 4. Biocompatibility (preferred material for medical implants).
TA5-Titanium
CNC Machining
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Key Features: Good strength • Easy machinability

Titanium 3.7164 has exceptional strength compared to pure titanium but retains the same stiffness and thermal properties.
TA2-Titanium
CNC Machining
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Key Features: Excellent strength-to-weight ratio • Good resistance to corrosion

Titanium 3.7035 has excellent strength-to-weight ratio with good resistance to corrosion. Its thermal stresses are low.
Polymer
PEEK
CNC Machining
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Key Features: 1. Exceptional heat resistance (do not decomposition at 300°C for a short term)
2. Metal-comparable mechanical strength (tensile strength >90 MPa)
3. Self-lubricating and wear-resistant (excellent PV value)
4. Biocompatibility (medical implant-grade certification)
PEEK GF-Polymer
CNC Machining
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Key Features: 1. Extremely high mechanical strength (flexural strength > 200 MPa) 2. High temperature and hydrolysis resistance (stable in steam environments) 3. Excellent chemical resistance (resistant to fuels, acids, and alkalis) 4. Low wear rate (superior self-lubricating performance)
PF Bakelite
CNC Machining
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Key Features: 1. Very high heat resistance (it can withstand short-term temperatures above 200 °C) 2. Excellent electrical insulation (ideal for high-frequency applications) 3. High rigidity and low creep (good dimensional stability) 4. Poor alkali resistance and brittleness (low impact strength)
Polyvinylidene Fluoride (PVDF)
CNC Machining
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Key Features: 1. Outstanding chemical resistance (resistant to acids, alkalis, and organic solvents) 2. UV and weather resistance (over 20 years of outdoor durability) 3. Piezoelectric and pyroelectric properties (used in sensors) 4. Flame retardancy and self-extinguishing (UL94 V-0 rating)
Polypropylene (PP)
CNC Machining
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Key Features: 1. Chemical resistance (it is resistant to acids, alkalis, and organic solvents) 2. Low density and high rigidity (ideal for lightweight applications) 3. Good insulation properties (excellent dielectric performance) 4. Poor UV and low-temperature resistance (additives for improvement required)
UHMW PE
CNC Machining
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Key Features: Self-lubricating • Resistant to abrasion • Corrosion resistant

UHMW PE is extremely tough and has high resistance to abrasion and wear. It is corrosion resistant and self-lubricating.
PTFE
CNC Machining
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Key Features: Slippery • Resistant to extreme temperatures

PTFE (Teflon) is a highly slippery material with excellent resistance to extreme temperatures. It has outstanding insulating properties.
POM
CNC Machining
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Key Features: Durable • Strong • Resistant to wear, creep and warp

POM is an easy resin for molding. It has a relatively high tensile strength as well as high resistance to wear, creep and warp.
PMMA
CNC Machining
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Key Features: Hard • Resistant to weather and chemicals

Acrylic (PMMA) is the most common form of clear, moldable thermoplastic, often used in place of glass due to its higher resistance.
PC
CNC Machining
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Key Features: Transparent • Durable • Shatter resistant

PC – Polycarbonate is a naturally transparent plastic with high strength and durability on impact. It is shatter resistant and heat resistant.
ABS
CNC Machining
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Key Features: Tough • Strong • Resistant to impact and scratches

ABS (Acrylonitrile Butadiene Styrene) is a thermoplastic material widely known for its high resistance to impact and toughness.