SAE-AISI H43 Steel vs. ASTM A232 Spring Steel

Both SAE-AISI H43 steel and ASTM A232 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 A232 spring steel.

SAE-AISI H43 (T20843) Molybdenum Hot-Work Steel ASTM A232 Chromium-Vanadium Spring Steel

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		200
Elastic (Young's, Tensile) Modulus, GPa		190

Poisson's Ratio		0.29
Poisson's Ratio		0.29

Shear Modulus, GPa		77
Shear Modulus, GPa		73

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

Thermal Properties

Latent Heat of Fusion, J/g		270
Latent Heat of Fusion, J/g		250

Melting Completion (Liquidus), °C		1530
Melting Completion (Liquidus), °C		1460

Melting Onset (Solidus), °C		1480
Melting Onset (Solidus), °C		1410

Specific Heat Capacity, J/kg-K		460
Specific Heat Capacity, J/kg-K		470

Thermal Conductivity, W/m-K		30
Thermal Conductivity, W/m-K		52

Thermal Expansion, µm/m-K		12
Thermal Expansion, µm/m-K		13

Otherwise Unclassified Properties

Base Metal Price, % relative		14
Base Metal Price, % relative		2.3

Density, g/cm³		7.9
Density, g/cm³		7.8

Embodied Carbon, kg CO₂/kg material		8.2
Embodied Carbon, kg CO₂/kg material		2.0

Embodied Energy, MJ/kg		120
Embodied Energy, MJ/kg		28

Embodied Water, L/kg		100
Embodied Water, L/kg		51

Common Calculations

Stiffness to Weight: Axial, points		14
Stiffness to Weight: Axial, points		13

Stiffness to Weight: Bending, points		24
Stiffness to Weight: Bending, points		24

Strength to Weight: Axial, points		25 to 75
Strength to Weight: Axial, points		64

Strength to Weight: Bending, points		22 to 46
Strength to Weight: Bending, points		42

Thermal Diffusivity, mm²/s		8.3
Thermal Diffusivity, mm²/s		14

Thermal Shock Resistance, points		21 to 62
Thermal Shock Resistance, points		53

Alloy Composition

Carbon (C), %		0.5 to 0.65
Carbon (C), %		0.48 to 0.53

Chromium (Cr), %		3.8 to 4.5
Chromium (Cr), %		0.8 to 1.1

Iron (Fe), %		83.2 to 85.9
Iron (Fe), %		96.8 to 97.7

Manganese (Mn), %		0.15 to 0.4
Manganese (Mn), %		0.7 to 0.9

Molybdenum (Mo), %		7.8 to 8.5
Molybdenum (Mo), %		0

Phosphorus (P), %		0 to 0.030
Phosphorus (P), %		0 to 0.020

Silicon (Si), %		0.2 to 0.45
Silicon (Si), %		0.15 to 0.35

Sulfur (S), %		0 to 0.030
Sulfur (S), %		0 to 0.035

Vanadium (V), %		1.8 to 2.2
Vanadium (V), %		0.15 to 0.3