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S81921 Stainless Steel vs. ASTM A204 Steel

Both S81921 stainless steel and ASTM A204 steel are iron alloys. There are 31 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is S81921 stainless steel and the bottom bar is ASTM A204 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 260
160 to 180
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 29
18 to 22
Fatigue Strength, MPa 370
200 to 220
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 79
73
Shear Strength, MPa 460
330 to 360
Tensile Strength: Ultimate (UTS), MPa 710
520 to 590
Tensile Strength: Yield (Proof), MPa 500
290 to 330

Thermal Properties

Latent Heat of Fusion, J/g 290
250
Maximum Temperature: Mechanical, °C 990
410
Melting Completion (Liquidus), °C 1430
1470
Melting Onset (Solidus), °C 1390
1420 to 1430
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 15
52
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
8.2

Otherwise Unclassified Properties

Base Metal Price, % relative 14
2.4
Density, g/cm3 7.7
7.9
Embodied Carbon, kg CO2/kg material 2.9
1.5
Embodied Energy, MJ/kg 41
20
Embodied Water, L/kg 150
47

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 180
90 to 95
Resilience: Unit (Modulus of Resilience), kJ/m3 630
220 to 290
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 25
18 to 21
Strength to Weight: Bending, points 23
18 to 20
Thermal Diffusivity, mm2/s 4.0
14
Thermal Shock Resistance, points 20
15 to 17