AISI 1018 Carbon Steel
Low carbon steel. Good machinability and weldability. Most common general-purpose steel.
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Low carbon steel. Good machinability and weldability. Most common general-purpose steel.
Low carbon steel. Similar to 1018 but slightly lower strength.
Medium carbon steel. Heat treatable. Good balance of strength and ductility.
Chrome-moly alloy. Excellent weldability. Popular in aerospace and motorsports.
Chrome-moly alloy. High strength when heat treated. Good fatigue resistance.
Ni-Cr-Mo alloy. Very high strength. Excellent toughness and fatigue resistance.
Most common structural steel in US. Excellent weldability. Low cost.
Primary steel for W-shapes in US. Replaced A36 for structural shapes.
Most common stainless steel. 18/8 (18% Cr, 8% Ni). Excellent corrosion resistance.
Marine grade. Contains molybdenum for superior corrosion resistance.
Low carbon version of 316. Better weldability, prevents carbide precipitation.
Martensitic stainless. Heat treatable. Good wear resistance.
Precipitation hardening. Very high strength with good corrosion resistance.
Ferritic stainless. Lower cost than 304. Magnetic.
Duplex (austenitic-ferritic). High strength. Excellent stress corrosion cracking resistance.
Most versatile aluminum alloy. Excellent machinability and weldability.
Highest strength aluminum. Not weldable. Zinc is primary alloying element.
Aerospace aluminum. Copper alloyed. High fatigue resistance. Poor corrosion resistance.
Excellent corrosion resistance. Good formability. Magnesium alloyed.
General purpose alloy. Excellent workability and weldability. Manganese alloyed.
Architectural alloy. Excellent surface finish. Good extrudability.
Highest strength non-heat-treatable alloy. Outstanding seawater corrosion resistance.
Most common titanium alloy (>50% of all Ti production). Alpha-beta alloy.
Most common CP titanium. Excellent corrosion resistance. Good formability.
99.9% pure copper. Highest electrical conductivity of commercial coppers.
Best machinability of all brasses. Standard for rating machinability (100%).
70% Cu, 30% Zn. Excellent cold working. Originally developed for cartridge cases.
5% Sn bronze with phosphorus. Excellent fatigue resistance and spring properties.
Highest strength copper alloy. Age hardenable. Expensive due to beryllium content.
Excellent corrosion and oxidation resistance. Used from cryogenic to 982°C.
Most used superalloy. Age hardenable. Good strength to 700°C.
Graphite flakes. Excellent damping. Good machinability. Brittle, no yield strength.
Spheroidal graphite. Much more ductile than gray iron. Also called nodular iron.
Heat treated white iron. Improved ductility. Largely replaced by ductile iron.
Excellent impact resistance. Easy to machine. Common 3D printing material.
Chemical resistant. FDA approved for food contact. Very low cost.
Very flexible. Excellent film properties. Lower strength than HDPE.
High strength engineering plastic. Good wear resistance. Absorbs moisture.
Premium engineering plastic. Continuous use to 250°C. Biocompatible. Very expensive.
Excellent dimensional stability. Low friction. Good fatigue and creep resistance.
Extremely high impact strength. Optically clear. UV sensitive.
Lowest friction coefficient of any solid. Chemically inert. Wide temperature range.
Highest abrasion resistance of any thermoplastic. Self-lubricating. FDA approved.
Second most produced plastic. Flame resistant. Low cost. Not UV stable.
Lowest density of common plastics. Good fatigue resistance (living hinges).
Biodegradable. Made from corn starch. Most popular 3D printing filament.
Quasi-isotropic layup values. Actual properties highly dependent on fiber orientation.
Much lower cost than CFRP. Good corrosion resistance. Non-conductive.
Excellent impact resistance. Difficult to machine. Negative thermal expansion along fiber.
Compressive strength 20 MPa (3000 psi). Standard residential grade.
Compressive strength 28 MPa (4000 psi). Common structural grade.
Compressive strength 41 MPa (6000 psi). High-strength structural grade.
Parallel to grain values. Hardwood. Most common hardwood in US.
Parallel to grain values. Softwood. Primary structural lumber in US.
Values in strong direction (parallel to face grain). CDX = exposure grade.
Parallel to grain values. Softwood. Premium structural lumber. Strong and stiff.
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Material compare
| Property | AISI 1018 Carbon Steel | AISI 1020 Carbon Steel |
|---|---|---|
| Density | 7870 kg/m³ | 7870 kg/m³ |
| Yield strength | 370 MPa | 350 MPa |
| Ultimate strength | 440 MPa | 420 MPa |
| Elastic modulus | 205 GPa | 200 GPa |
| Shear modulus | 80 GPa | 80 GPa |
| Poisson ratio | 0.29 | 0.29 |
| Thermal conductivity | 51.9 W/(m·K) | 51.9 W/(m·K) |
| Thermal expansion | 11.5 µm/(m·K) | 11.7 µm/(m·K) |
| Specific heat | 486 J/(kg·K) | 486 J/(kg·K) |
| Melting point | 1410-1450 °C | 1410-1450 °C |
| Hardness | Brinell 126, Rockwell B B71 | Brinell 119 |
| Applications | Shafts, Pins, Rods, Gears, Machine parts, Weldments | Structural components, Carburized parts, Fasteners |
Carbon Steel
Low carbon steel. Good machinability and weldability. Most common general-purpose steel.
Carbon Steel
Low carbon steel. Similar to 1018 but slightly lower strength.
Carbon Steel
Medium carbon steel. Heat treatable. Good balance of strength and ductility.
Carbon Steel
Chrome-moly alloy. Excellent weldability. Popular in aerospace and motorsports.
Carbon Steel
Chrome-moly alloy. High strength when heat treated. Good fatigue resistance.
Carbon Steel
Ni-Cr-Mo alloy. Very high strength. Excellent toughness and fatigue resistance.
Carbon Steel
Most common structural steel in US. Excellent weldability. Low cost.
Carbon Steel
Primary steel for W-shapes in US. Replaced A36 for structural shapes.
Stainless Steel
Most common stainless steel. 18/8 (18% Cr, 8% Ni). Excellent corrosion resistance.
Stainless Steel
Marine grade. Contains molybdenum for superior corrosion resistance.
Stainless Steel
Low carbon version of 316. Better weldability, prevents carbide precipitation.
Stainless Steel
Martensitic stainless. Heat treatable. Good wear resistance.
Stainless Steel
Precipitation hardening. Very high strength with good corrosion resistance.
Stainless Steel
Ferritic stainless. Lower cost than 304. Magnetic.
Stainless Steel
Duplex (austenitic-ferritic). High strength. Excellent stress corrosion cracking resistance.
Aluminum
Most versatile aluminum alloy. Excellent machinability and weldability.
Aluminum
Highest strength aluminum. Not weldable. Zinc is primary alloying element.
Aluminum
Aerospace aluminum. Copper alloyed. High fatigue resistance. Poor corrosion resistance.
Aluminum
Excellent corrosion resistance. Good formability. Magnesium alloyed.
Aluminum
General purpose alloy. Excellent workability and weldability. Manganese alloyed.
Aluminum
Architectural alloy. Excellent surface finish. Good extrudability.
Aluminum
Highest strength non-heat-treatable alloy. Outstanding seawater corrosion resistance.
Titanium
Most common titanium alloy (>50% of all Ti production). Alpha-beta alloy.
Titanium
Most common CP titanium. Excellent corrosion resistance. Good formability.
Copper
99.9% pure copper. Highest electrical conductivity of commercial coppers.
Copper
Best machinability of all brasses. Standard for rating machinability (100%).
Copper
70% Cu, 30% Zn. Excellent cold working. Originally developed for cartridge cases.
Copper
5% Sn bronze with phosphorus. Excellent fatigue resistance and spring properties.
Copper
Highest strength copper alloy. Age hardenable. Expensive due to beryllium content.
Nickel
Excellent corrosion and oxidation resistance. Used from cryogenic to 982°C.
Nickel
Most used superalloy. Age hardenable. Good strength to 700°C.
Cast Iron
Graphite flakes. Excellent damping. Good machinability. Brittle, no yield strength.
Cast Iron
Spheroidal graphite. Much more ductile than gray iron. Also called nodular iron.
Cast Iron
Heat treated white iron. Improved ductility. Largely replaced by ductile iron.
Plastics
Excellent impact resistance. Easy to machine. Common 3D printing material.
Plastics
Chemical resistant. FDA approved for food contact. Very low cost.
Plastics
Very flexible. Excellent film properties. Lower strength than HDPE.
Plastics
High strength engineering plastic. Good wear resistance. Absorbs moisture.
Plastics
Premium engineering plastic. Continuous use to 250°C. Biocompatible. Very expensive.
Plastics
Excellent dimensional stability. Low friction. Good fatigue and creep resistance.
Plastics
Extremely high impact strength. Optically clear. UV sensitive.
Plastics
Lowest friction coefficient of any solid. Chemically inert. Wide temperature range.
Plastics
Highest abrasion resistance of any thermoplastic. Self-lubricating. FDA approved.
Plastics
Second most produced plastic. Flame resistant. Low cost. Not UV stable.
Plastics
Lowest density of common plastics. Good fatigue resistance (living hinges).
Plastics
Biodegradable. Made from corn starch. Most popular 3D printing filament.
Composites
Quasi-isotropic layup values. Actual properties highly dependent on fiber orientation.
Composites
Much lower cost than CFRP. Good corrosion resistance. Non-conductive.
Composites
Excellent impact resistance. Difficult to machine. Negative thermal expansion along fiber.
Concrete
Compressive strength 20 MPa (3000 psi). Standard residential grade.
Concrete
Compressive strength 28 MPa (4000 psi). Common structural grade.
Concrete
Compressive strength 41 MPa (6000 psi). High-strength structural grade.
Wood
Parallel to grain values. Hardwood. Most common hardwood in US.
Wood
Parallel to grain values. Softwood. Primary structural lumber in US.
Wood
Values in strong direction (parallel to face grain). CDX = exposure grade.
Wood
Parallel to grain values. Softwood. Premium structural lumber. Strong and stiff.