Stainless steel for CNC machining

CNC Metal Materials List

Aluminum CNC machining
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Stainless steel CNC machining
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Stainless Steel 15-5

Stainless Steel 15-5 is a precipitation-hardened (PH) metal. The process gives it excellent toughness, strength, and corrosion resistance. Mechanical properties are enhanced by low-temperature heat treatment, making this material ideal for aerospace and nuclear applications.

Stainless Steel 15-5 Properties

Tensile Strength, Yield (MPa)Shear Modulus (GPa)Elongation at Break (%)Hardness (Brinell)Density (g/cm^3)
1208759.84207.8

Stainless Steel 17-4

This precipitation-hardened (PH) steel grade has better corrosion-resistant properties at high temperatures when compared to 15-5 stainless steel. It achieves this increased corrosion resistance by sacrificing mechanical strength. This is also one of the more widely used grades of PH stainless steel. Applications include chemical processing parts and gas turbines.

Stainless Steel 17-4 Properties

Tensile Strength, Yield (MPa)Shear Modulus (GPa)Elongation at Break (%)Hardness (Brinell)Density (g/cm^3)
109077.463527.70

Stainless Steel SS304

This grade of stainless steel has an austenitic crystal structure and is one of the most widely used grades. 18-8 is often referred to as 304 stainless steel or SS304 is regularly used to create fasteners and pressure piping.

Stainless Steel SS304 Properties

Tensile Strength, Yield (MPa)Shear Modulus (GPa)Elongation at Break (%)Hardness (Brinell)Density (g/cm^3)
21574701238

Stainless Steel 303

This grade of austenitic stainless steel was formulated to be easier to machine than SS304 by including sulfur among the alloying elements. This addition, however, makes the alloy less corrosion resistant than SS304. It is ideal for items that require heavy machining like gears and shafts.

Stainless Steel 303 Properties

Tensile Strength, Yield (MPa)Shear Modulus (GPa)Elongation at Break (%)Hardness (Brinell)Density (g/cm^3)
41577.2402288

Stainless Steel 316

This austenitic grade of stainless steel contains molybdenum which gives it excellent corrosion resistance. In addition to this, it is highly formable and weldable. Applications include chemical tanks and boat fittings. The low carbon version, 316L, is more resistant to chlorides than the basic formulation.

Stainless Steel 316 Properties

Tensile Strength, Yield (MPa)Shear Modulus (GPa)Elongation at Break (%)Hardness (Brinell)Density (g/cm^3)
29074502178

Stainless Steel 416

Stainless steel 416 is one of the most machinable stainless steels available. As is the case with other alloys, this improved machinability comes at the cost of corrosion resistance, so it generally rusts easier than its other stainless steel counterparts. Applications include motor shafts and gears.

Stainless Steel 416 Properties

Tensile Strength, Yield (MPa)Shear Modulus (GPa)Elongation at Break (%)Hardness (Brinell)Density (g/cm^3)
60083202377.8

Stainless Steel 420

This martensitic stainless steel has a higher carbon content and lower chromium content than the other steels mentioned previously. Due to its lower chromium content, it has only mild corrosion resistance but makes up for that with improved mechanical properties in its annealed state.

Stainless Steel 420 Properties

Tensile Strength, Yield (MPa)Shear Modulus (GPa)Elongation at Break (%)Hardness (Brinell)Density (g/cm^3)
34575252417.8

Stainless Steel 440C

Stainless steel 440C has the highest carbon content of the 400 series. This means that 440C has only mild corrosion resistance. However, it has excellent hardness characteristics (which can be further increased with heat treatment) and mechanical strength. Typical applications include bearing housings and surgical instruments.

Stainless Steel 440C Properties

Tensile Strength, Yield (MPa)Shear Modulus (GPa)Elongation at Break (%)Hardness (Brinell)Density (g/cm^3)
44583.9142237.8

Stainless Steel 410

Stainless steel 410 is the most general-purpose steel among the 400 series. It has a low carbon content that gives it improved corrosion resistance. Like other martensitic steels, 410 can be hardened to achieve impressive mechanical strength. 410 stainless steel is typically used for cutlery, fasteners, and machinery parts.

Stainless Steel 410 Properties

Tensile Strength, Yield (MPa)Shear Modulus (GPa)Elongation at Break (%)Hardness (Brinell)Density (g/cm^3)
12257314.54227.8

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