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ASTM A204 Steel vs. S21800 Stainless Steel

Both ASTM A204 steel and S21800 stainless steel are iron alloys. There are 27 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is ASTM A204 steel and the bottom bar is S21800 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160 to 180
210
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 18 to 22
40
Fatigue Strength, MPa 200 to 220
330
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
75
Shear Strength, MPa 330 to 360
510
Tensile Strength: Ultimate (UTS), MPa 520 to 590
740
Tensile Strength: Yield (Proof), MPa 290 to 330
390

Thermal Properties

Latent Heat of Fusion, J/g 250
340
Maximum Temperature: Mechanical, °C 410
900
Melting Completion (Liquidus), °C 1470
1360
Melting Onset (Solidus), °C 1420 to 1430
1310
Specific Heat Capacity, J/kg-K 470
500
Thermal Expansion, µm/m-K 13
16

Otherwise Unclassified Properties

Base Metal Price, % relative 2.4
15
Density, g/cm3 7.9
7.5
Embodied Carbon, kg CO2/kg material 1.5
3.1
Embodied Energy, MJ/kg 20
45
Embodied Water, L/kg 47
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 90 to 95
250
Resilience: Unit (Modulus of Resilience), kJ/m3 220 to 290
390
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
26
Strength to Weight: Axial, points 18 to 21
27
Strength to Weight: Bending, points 18 to 20
24
Thermal Shock Resistance, points 15 to 17
17