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ASTM A572 Steel vs. S31803 Stainless Steel

Both ASTM A572 steel and S31803 stainless steel are iron alloys. There are 31 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is ASTM A572 steel and the bottom bar is S31803 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140 to 190
260
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 18 to 25
29
Fatigue Strength, MPa 240 to 340
370
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 73
80
Shear Strength, MPa 300 to 380
460
Tensile Strength: Ultimate (UTS), MPa 470 to 620
710
Tensile Strength: Yield (Proof), MPa 330 to 510
500

Thermal Properties

Latent Heat of Fusion, J/g 250
300
Maximum Temperature: Mechanical, °C 400
1060
Melting Completion (Liquidus), °C 1460
1450
Melting Onset (Solidus), °C 1420
1400
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 51
16
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 8.2 to 8.3
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 2.0
17
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.6
3.6
Embodied Energy, MJ/kg 22
49
Embodied Water, L/kg 47
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 100 to 110
180
Resilience: Unit (Modulus of Resilience), kJ/m3 290 to 690
630
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 17 to 22
25
Strength to Weight: Bending, points 17 to 21
23
Thermal Diffusivity, mm2/s 14
4.3
Thermal Shock Resistance, points 14 to 18
20