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SAE-AISI H21 Steel vs. AWS E33-31

Both SAE-AISI H21 steel and AWS E33-31 are iron alloys. They have a modest 34% of their average alloy composition in common, which, by itself, doesn't mean much. There are 20 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 SAE-AISI H21 steel and the bottom bar is AWS E33-31.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
210
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 76
81
Tensile Strength: Ultimate (UTS), MPa 720 to 1790
810

Thermal Properties

Latent Heat of Fusion, J/g 250
320
Melting Completion (Liquidus), °C 1630
1380
Melting Onset (Solidus), °C 1580
1330
Specific Heat Capacity, J/kg-K 440
480
Thermal Expansion, µm/m-K 11
14

Otherwise Unclassified Properties

Base Metal Price, % relative 23
36
Density, g/cm3 8.5
7.9
Embodied Carbon, kg CO2/kg material 4.5
6.0
Embodied Energy, MJ/kg 68
86
Embodied Water, L/kg 72
260

Common Calculations

PREN (Pitting Resistance) 19
44
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 23 to 58
28
Strength to Weight: Bending, points 21 to 38
24
Thermal Shock Resistance, points 24 to 59
19

Alloy Composition

Carbon (C), % 0.28 to 0.36
0 to 0.030
Chromium (Cr), % 3.0 to 3.8
31 to 35
Copper (Cu), % 0 to 0.25
0.4 to 0.8
Iron (Fe), % 87.6 to 93.8
24.7 to 34.8
Manganese (Mn), % 0.15 to 0.4
2.5 to 4.0
Molybdenum (Mo), % 0
1.0 to 2.0
Nickel (Ni), % 0 to 0.3
30 to 32
Nitrogen (N), % 0
0.3 to 0.5
Phosphorus (P), % 0 to 0.030
0 to 0.020
Silicon (Si), % 0.15 to 0.5
0 to 0.9
Sulfur (S), % 0 to 0.030
0 to 0.010
Tungsten (W), % 8.5 to 10
0
Vanadium (V), % 0.3 to 0.6
0