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SAE-AISI H43 Steel vs. ASTM A231 Spring Steel

Both SAE-AISI H43 steel and ASTM A231 spring steel are iron alloys. They have 87% of their average alloy composition in common. There are 21 material properties with values for both materials. Properties with values for just one material (11, 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 A231 spring steel.

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
73
Tensile Strength: Ultimate (UTS), MPa 710 to 2140
1790

Thermal Properties

Latent Heat of Fusion, J/g 270
250
Melting Completion (Liquidus), °C 1530
1460
Melting Onset (Solidus), °C 1480
1410
Specific Heat Capacity, J/kg-K 460
470
Thermal Conductivity, W/m-K 30
52
Thermal Expansion, µm/m-K 12
13

Otherwise Unclassified Properties

Base Metal Price, % relative 14
2.3
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 8.2
2.0
Embodied Energy, MJ/kg 120
28
Embodied Water, L/kg 100
51

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 25 to 75
64
Strength to Weight: Bending, points 22 to 46
42
Thermal Diffusivity, mm2/s 8.3
14
Thermal Shock Resistance, points 21 to 62
53

Alloy Composition

Carbon (C), % 0.5 to 0.65
0.48 to 0.53
Chromium (Cr), % 3.8 to 4.5
0.8 to 1.1
Iron (Fe), % 83.2 to 85.9
96.7 to 97.7
Manganese (Mn), % 0.15 to 0.4
0.7 to 0.9
Molybdenum (Mo), % 7.8 to 8.5
0
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 0.2 to 0.45
0.15 to 0.35
Sulfur (S), % 0 to 0.030
0 to 0.040
Vanadium (V), % 1.8 to 2.2
0.15 to 0.3