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S21904 Stainless Steel vs. ASTM A202 Steel

Both S21904 stainless steel and ASTM A202 steel are iron alloys. There are 31 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is S21904 stainless steel and the bottom bar is ASTM A202 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210 to 300
180 to 200
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 17 to 51
17 to 18
Fatigue Strength, MPa 380 to 550
240
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 78
73
Shear Strength, MPa 510 to 620
360 to 410
Tensile Strength: Ultimate (UTS), MPa 700 to 1000
590 to 670
Tensile Strength: Yield (Proof), MPa 390 to 910
350 to 360

Thermal Properties

Latent Heat of Fusion, J/g 290
260
Maximum Temperature: Mechanical, °C 980
410
Melting Completion (Liquidus), °C 1400
1450
Melting Onset (Solidus), °C 1350
1410
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 14
52
Thermal Expansion, µm/m-K 17
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.5
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 2.9
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 15
2.1
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 3.0
1.4
Embodied Energy, MJ/kg 43
19
Embodied Water, L/kg 160
49

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 160 to 310
93 to 96
Resilience: Unit (Modulus of Resilience), kJ/m3 380 to 2070
330 to 350
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 25 to 36
21 to 24
Strength to Weight: Bending, points 23 to 29
20 to 22
Thermal Diffusivity, mm2/s 3.8
14
Thermal Shock Resistance, points 15 to 21
17 to 20

Comparable Variants