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ASTM A372 Grade H Steel vs. N08031 Stainless Steel

Both ASTM A372 grade H steel and N08031 stainless steel are iron alloys. They have a modest 35% of their average alloy composition in common, which, by itself, doesn't mean much. There are 28 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is ASTM A372 grade H steel and the bottom bar is N08031 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
210
Elongation at Break, % 20 to 22
45
Fatigue Strength, MPa 310 to 380
290
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
81
Shear Strength, MPa 410 to 570
510
Tensile Strength: Ultimate (UTS), MPa 650 to 910
730
Tensile Strength: Yield (Proof), MPa 430 to 550
310

Thermal Properties

Latent Heat of Fusion, J/g 250
310
Maximum Temperature: Mechanical, °C 410
1100
Melting Completion (Liquidus), °C 1460
1440
Melting Onset (Solidus), °C 1420
1390
Specific Heat Capacity, J/kg-K 470
460
Thermal Conductivity, W/m-K 45
12
Thermal Expansion, µm/m-K 13
18

Otherwise Unclassified Properties

Base Metal Price, % relative 2.3
39
Density, g/cm3 7.8
8.1
Embodied Carbon, kg CO2/kg material 1.5
7.1
Embodied Energy, MJ/kg 20
96
Embodied Water, L/kg 49
240

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 130 to 160
270
Resilience: Unit (Modulus of Resilience), kJ/m3 500 to 810
230
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 23 to 32
25
Strength to Weight: Bending, points 21 to 27
22
Thermal Diffusivity, mm2/s 12
3.1
Thermal Shock Resistance, points 19 to 27
14

Alloy Composition

Carbon (C), % 0.3 to 0.4
0 to 0.015
Chromium (Cr), % 0.4 to 0.65
26 to 28
Copper (Cu), % 0
1.0 to 1.4
Iron (Fe), % 97.3 to 98.3
29 to 36.9
Manganese (Mn), % 0.75 to 1.1
0 to 2.0
Molybdenum (Mo), % 0.15 to 0.25
6.0 to 7.0
Nickel (Ni), % 0
30 to 32
Nitrogen (N), % 0
0.15 to 0.25
Phosphorus (P), % 0 to 0.015
0 to 0.020
Silicon (Si), % 0.15 to 0.35
0 to 0.3
Sulfur (S), % 0 to 0.010
0 to 0.010