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S31100 Stainless Steel vs. ASTM A302 Alloy Steel

Both S31100 stainless steel and ASTM A302 alloy 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 S31100 stainless steel and the bottom bar is ASTM A302 alloy steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 270
180 to 190
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 4.5
20 to 23
Fatigue Strength, MPa 330
250 to 280
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 79
73
Shear Strength, MPa 580
370 to 390
Tensile Strength: Ultimate (UTS), MPa 1000
590 to 620
Tensile Strength: Yield (Proof), MPa 710
350 to 390

Thermal Properties

Latent Heat of Fusion, J/g 300
250
Maximum Temperature: Mechanical, °C 1100
410
Melting Completion (Liquidus), °C 1420
1460
Melting Onset (Solidus), °C 1380
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 16
39 to 51
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
7.2 to 7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.4
8.2 to 8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 16
2.4 to 3.0
Density, g/cm3 7.7
7.8 to 7.9
Embodied Carbon, kg CO2/kg material 3.1
1.5 to 1.6
Embodied Energy, MJ/kg 44
20 to 21
Embodied Water, L/kg 170
48 to 50

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 40
110 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 1240
330 to 410
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 36
21 to 22
Strength to Weight: Bending, points 29
20 to 21
Thermal Diffusivity, mm2/s 4.2
10 to 14
Thermal Shock Resistance, points 28
17 to 18