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SAE-AISI H43 Steel vs. ASTM A369 Grade FP21

Both SAE-AISI H43 steel and ASTM A369 grade FP21 are iron alloys. They have 89% 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 H43 steel and the bottom bar is ASTM A369 grade FP21.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 77
74
Tensile Strength: Ultimate (UTS), MPa 710 to 2140
470

Thermal Properties

Latent Heat of Fusion, J/g 270
260
Melting Completion (Liquidus), °C 1530
1470
Melting Onset (Solidus), °C 1480
1430
Specific Heat Capacity, J/kg-K 460
470
Thermal Conductivity, W/m-K 30
41
Thermal Expansion, µm/m-K 12
13

Otherwise Unclassified Properties

Base Metal Price, % relative 14
4.0
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 8.2
1.8
Embodied Energy, MJ/kg 120
23
Embodied Water, L/kg 100
61

Common Calculations

PREN (Pitting Resistance) 31
6.2
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 25 to 75
17
Strength to Weight: Bending, points 22 to 46
17
Thermal Diffusivity, mm2/s 8.3
11
Thermal Shock Resistance, points 21 to 62
14

Alloy Composition

Carbon (C), % 0.5 to 0.65
0.050 to 0.15
Chromium (Cr), % 3.8 to 4.5
2.7 to 3.4
Iron (Fe), % 83.2 to 85.9
94.3 to 96.2
Manganese (Mn), % 0.15 to 0.4
0.3 to 0.6
Molybdenum (Mo), % 7.8 to 8.5
0.8 to 1.1
Phosphorus (P), % 0 to 0.030
0 to 0.025
Silicon (Si), % 0.2 to 0.45
0 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.025
Vanadium (V), % 1.8 to 2.2
0