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AISI 321H Stainless Steel vs. ASTM A372 Grade H Steel

Both AISI 321H stainless steel and ASTM A372 grade H steel are iron alloys. They have 71% 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 AISI 321H stainless steel and the bottom bar is ASTM A372 grade H steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
200 to 280
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 40
20 to 22
Fatigue Strength, MPa 200
310 to 380
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
73
Shear Strength, MPa 400
410 to 570
Tensile Strength: Ultimate (UTS), MPa 580
650 to 910
Tensile Strength: Yield (Proof), MPa 230
430 to 550

Thermal Properties

Latent Heat of Fusion, J/g 290
250
Maximum Temperature: Mechanical, °C 940
410
Melting Completion (Liquidus), °C 1430
1460
Melting Onset (Solidus), °C 1380
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 15
45
Thermal Expansion, µm/m-K 17
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 16
2.3
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 3.2
1.5
Embodied Energy, MJ/kg 46
20
Embodied Water, L/kg 140
49

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 190
130 to 160
Resilience: Unit (Modulus of Resilience), kJ/m3 140
500 to 810
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 21
23 to 32
Strength to Weight: Bending, points 20
21 to 27
Thermal Diffusivity, mm2/s 4.0
12
Thermal Shock Resistance, points 12
19 to 27

Alloy Composition

Carbon (C), % 0.040 to 0.1
0.3 to 0.4
Chromium (Cr), % 17 to 19
0.4 to 0.65
Iron (Fe), % 65.4 to 74
97.3 to 98.3
Manganese (Mn), % 0 to 2.0
0.75 to 1.1
Molybdenum (Mo), % 0
0.15 to 0.25
Nickel (Ni), % 9.0 to 12
0
Phosphorus (P), % 0 to 0.045
0 to 0.015
Silicon (Si), % 0 to 0.75
0.15 to 0.35
Sulfur (S), % 0 to 0.030
0 to 0.010
Titanium (Ti), % 0 to 0.7
0