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SAE-AISI H21 Steel vs. AWS E240

Both SAE-AISI H21 steel and AWS E240 are iron alloys. They have 68% of their average alloy composition in common. There are 22 material properties with values for both materials. Properties with values for just one material (1, 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 E240.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 76
77
Tensile Strength: Ultimate (UTS), MPa 720 to 1790
770

Thermal Properties

Latent Heat of Fusion, J/g 250
290
Melting Completion (Liquidus), °C 1630
1390
Melting Onset (Solidus), °C 1580
1350
Specific Heat Capacity, J/kg-K 440
480
Thermal Conductivity, W/m-K 27
15
Thermal Expansion, µm/m-K 11
15

Otherwise Unclassified Properties

Base Metal Price, % relative 23
14
Density, g/cm3 8.5
7.7
Embodied Carbon, kg CO2/kg material 4.5
3.0
Embodied Energy, MJ/kg 68
42
Embodied Water, L/kg 72
160

Common Calculations

PREN (Pitting Resistance) 19
22
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 Diffusivity, mm2/s 7.1
3.9
Thermal Shock Resistance, points 24 to 59
19

Alloy Composition

Carbon (C), % 0.28 to 0.36
0 to 0.060
Chromium (Cr), % 3.0 to 3.8
17 to 19
Copper (Cu), % 0 to 0.25
0 to 0.75
Iron (Fe), % 87.6 to 93.8
58.6 to 68.4
Manganese (Mn), % 0.15 to 0.4
10.5 to 13.5
Molybdenum (Mo), % 0
0 to 0.75
Nickel (Ni), % 0 to 0.3
4.0 to 6.0
Nitrogen (N), % 0
0.1 to 0.3
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 0.15 to 0.5
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 8.5 to 10
0
Vanadium (V), % 0.3 to 0.6
0