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AISI 431 Stainless Steel vs. ASTM A372 Grade J Steel

Both AISI 431 stainless steel and ASTM A372 grade J steel are iron alloys. They have 83% of their average alloy composition in common. 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 AISI 431 stainless steel and the bottom bar is ASTM A372 grade J steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 250
200 to 310
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 15 to 17
17 to 22
Fatigue Strength, MPa 430 to 610
310 to 570
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
73
Shear Strength, MPa 550 to 840
410 to 630
Tensile Strength: Ultimate (UTS), MPa 890 to 1380
650 to 1020
Tensile Strength: Yield (Proof), MPa 710 to 1040
430 to 850

Thermal Properties

Latent Heat of Fusion, J/g 280
250
Maximum Temperature: Mechanical, °C 850
420
Melting Completion (Liquidus), °C 1510
1460
Melting Onset (Solidus), °C 1450
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 26
44
Thermal Expansion, µm/m-K 12
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.6
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 3.0
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
2.4
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.2
1.5
Embodied Energy, MJ/kg 31
20
Embodied Water, L/kg 120
51

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 180
130 to 170
Resilience: Unit (Modulus of Resilience), kJ/m3 1270 to 2770
500 to 1930
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 32 to 50
23 to 36
Strength to Weight: Bending, points 27 to 36
21 to 29
Thermal Diffusivity, mm2/s 7.0
12
Thermal Shock Resistance, points 28 to 43
19 to 30

Alloy Composition

Carbon (C), % 0 to 0.2
0.35 to 0.5
Chromium (Cr), % 15 to 17
0.8 to 1.2
Iron (Fe), % 78.2 to 83.8
96.7 to 97.8
Manganese (Mn), % 0 to 1.0
0.75 to 1.1
Molybdenum (Mo), % 0
0.15 to 0.25
Nickel (Ni), % 1.3 to 2.5
0
Phosphorus (P), % 0 to 0.040
0 to 0.015
Silicon (Si), % 0 to 1.0
0.15 to 0.35
Sulfur (S), % 0 to 0.030
0 to 0.010

Comparable Variants