Steel

A36/1018 Steel is a mild, low carbon steel that is machinable, weldable and useful where high-strength is not required, such as fixtures and mounting plates. It is magnetic and heat treatable.

4140 alloy steel is generally harder and stronger than carbon steel. Additionally, it provides high impact resistance, fatigue strength, and torsional strength, which makes 4140 a great choice for drive shafts, axles, and torsion bars. In terms of hardening, 4140 can be hardened using a variety of methods such as cold working, or heating and quenching.

1045 Carbon Steel is stronger than low carbon steel (1018 Steel) but is easy to machine. It is heat treatable and can be used for bolts, studs and shafts.

4130 Alloy Steel is similar to 4140 Alloy Steel but offers better weldability and has a slightly lower carbon content. It is best suited for gears and other structural applications.

Galvanized Low-Carbon Steel has an outer coating of zinc to improve corrosion resistance. It is important to note that the coating will only be present on non-machined areas.

Galvanneal is a type of steel that undergoes a process combining galvanizing (zinc coating) and annealing (heating) to create a durable, corrosion-resistant surface.   It is commonly used in the automotive, construction, and appliance industries due to its excellent paint adhesion and corrosion resistance.

A514 Alloy Steel is a high strength, low alloy steel that is used mainly in structural applications. It is weldable, heat treatable and is best suited for supporting heavy loads.

4340 Alloy Steel is a medium carbon, low alloy steel that is highly useful in environments involving extreme impact, heat, and wear.

12L14 & 1215 are carbon steels that are resulfurized and rephosphorized, which makes them easy to machine. However, they have a comparitively low level of carbon, so they have less strength than other cold-drawn grades of steel.

8620 Steel is a highly wear-resistant material with good strength and toughness properties. It has a low-carbon content, so is an ideal candidate for use in welding applications.

Material Properties

1018 Low Carbon Steel

Yield Strength (tensile)：60,000 psi

Elongation at Break：15%

HardnessRockwell： B90

Density：7.87 g/㎤，0.284 lbs / cu. in.

4140 Steel

Yield Strength (tensile)：60,000 psi

Elongation at Break：21%

Hardness;Rockwell C15

Density：7.87 g/㎤，0.284 lbs / cu. in.

1045 Carbon Steel

Yield Strength (tensile)：77,000 psi

Elongation at Break：19%

Hardness：Rockwell B90

Density：7.87 g/㎤，0.284 lbs / cu. in.

4130 Steel

Yield Strength (tensile)：63100 psi

Elongation at Break：25.5%

Hardness：Rockwell B92

Density：7.85 g/㎤，0.284 cu. in.

Galvanized Low-Carbon Steel

Yield Strength (tensile)：30,000 psi

Elongation at Break：23%

Hardness：Rockwell B65

Density：7.87 g/㎤，0.284 lbs / cu. in.

A514 Steel

Yield Strength (tensile)：100,000 psi

Elongation at Break：18%

Hardness：Rockwell C20

Density：7.87 g/㎤，0.284 lbs / cu. in.

4340 Steel

Yield Strength (tensile)：122,000 psi

Elongation at Break：13%

Hardness;Rockwell C20

Density；7.87 g/㎤，0.284 lbs / cu. in.

12L14 Carbon Steel

Yield Strength (tensile)：60,000 PSI

Elongation at Break：15%

Hardness;Rockwell B85

Density；7.86 g/cm^3，0.28lb / in^3

1215 Carbon Steel

Yield Strength (tensile)：60,000 PSI

Elongation at Break：10%

Hardness;Rockwell B85

Density；7.86 g/cm^3，0.28lb / in^3

8620 Steel

Yield Strength (tensile)：55,000 PSI

Elongation at Break：15%

Hardness：Rockwell B85

Density：7.86 g/cm^3，0.28lb / in^3

A36 Steel

Yield Strength (tensile)：60,000 PSI

Elongation at Break：15%

Hardness：Rockwell B90

Density：7.86 g/cm^3，0.28lb / in^3

Material Finish

The finish of stainless steel varies greatly depending on surface roughness, but it’s generally characterized as being more shiny than unfinished aluminum alloys, and slightly darker and more silver in color.

Stainless steel can also be media-blasted, sanded, hand-polished, and powder coated to achieve a multitude of surface finishes.

Design Recommendations

Min Wall Thickness：0.5 mm

Min End Mill Size：0.8 mm (0.03 in)

Min Drill Size：0.5 mm (0.02 in)

Max Part Size：1200 x 500 x 152 mm[(x,y,z] (mill) 152 x 394 mm [d,h] (lathe)

Undercuts：Square profile, full radius, dovetail profiles

Radii（Depth） ：

· Depth must not exceed 12x drill bit diameter.

· For end mills, depth must not exceed 10x drill bit diameter.

Cost Saving Tip：To reduce costs, limit the number of part setups, the number of inspection dimensions or tight tolerances, and deep pockets with small radii.