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SAE-AISI H21 Steel vs. ASTM A369 Grade FP22

Both SAE-AISI H21 steel and ASTM A369 grade FP22 are iron alloys. They have a moderately high 94% of their average alloy composition in common. There are 22 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI H21 steel and the bottom bar is ASTM A369 grade FP22.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 76
74
Tensile Strength: Ultimate (UTS), MPa 720 to 1790
470

Thermal Properties

Latent Heat of Fusion, J/g 250
260
Melting Completion (Liquidus), °C 1630
1470
Melting Onset (Solidus), °C 1580
1430
Specific Heat Capacity, J/kg-K 440
470
Thermal Conductivity, W/m-K 27
39
Thermal Expansion, µm/m-K 11
13

Otherwise Unclassified Properties

Base Metal Price, % relative 23
3.8
Density, g/cm3 8.5
7.9
Embodied Carbon, kg CO2/kg material 4.5
1.7
Embodied Energy, MJ/kg 68
23
Embodied Water, L/kg 72
58

Common Calculations

PREN (Pitting Resistance) 19
5.5
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 23 to 58
17
Strength to Weight: Bending, points 21 to 38
17
Thermal Diffusivity, mm2/s 7.1
11
Thermal Shock Resistance, points 24 to 59
14

Alloy Composition

Carbon (C), % 0.28 to 0.36
0.050 to 0.15
Chromium (Cr), % 3.0 to 3.8
1.9 to 2.6
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 87.6 to 93.8
95 to 96.9
Manganese (Mn), % 0.15 to 0.4
0.3 to 0.6
Molybdenum (Mo), % 0
0.87 to 1.1
Nickel (Ni), % 0 to 0.3
0
Phosphorus (P), % 0 to 0.030
0 to 0.025
Silicon (Si), % 0.15 to 0.5
0 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.025
Tungsten (W), % 8.5 to 10
0
Vanadium (V), % 0.3 to 0.6
0