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S31803 Stainless Steel vs. ASTM A372 Grade G Steel

Both S31803 stainless steel and ASTM A372 grade G steel are iron alloys. They have 70% of their average alloy composition in common. 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 S31803 stainless steel and the bottom bar is ASTM A372 grade G steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 260
200 to 280
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 29
20 to 22
Fatigue Strength, MPa 370
310 to 380
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 80
73
Shear Strength, MPa 460
410 to 570
Tensile Strength: Ultimate (UTS), MPa 710
650 to 910
Tensile Strength: Yield (Proof), MPa 500
430 to 550

Thermal Properties

Latent Heat of Fusion, J/g 300
250
Maximum Temperature: Mechanical, °C 1060
410
Melting Completion (Liquidus), °C 1450
1460
Melting Onset (Solidus), °C 1400
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 16
46
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
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 17
2.2
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 3.6
1.5
Embodied Energy, MJ/kg 49
20
Embodied Water, L/kg 160
49

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 180
130 to 160
Resilience: Unit (Modulus of Resilience), kJ/m3 630
500 to 810
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 25
23 to 32
Strength to Weight: Bending, points 23
21 to 27
Thermal Diffusivity, mm2/s 4.3
13
Thermal Shock Resistance, points 20
19 to 27

Alloy Composition

Carbon (C), % 0 to 0.030
0.25 to 0.35
Chromium (Cr), % 21 to 23
0.4 to 0.65
Iron (Fe), % 63.7 to 71.9
97.4 to 98.4
Manganese (Mn), % 0 to 2.0
0.7 to 1.0
Molybdenum (Mo), % 2.5 to 3.5
0.15 to 0.25
Nickel (Ni), % 4.5 to 6.5
0
Nitrogen (N), % 0.080 to 0.2
0
Phosphorus (P), % 0 to 0.030
0 to 0.015
Silicon (Si), % 0 to 1.0
0.15 to 0.35
Sulfur (S), % 0 to 0.020
0 to 0.010