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SAE-AISI M34 Steel vs. ASTM A232 Spring Steel

Both SAE-AISI M34 steel and ASTM A232 spring steel are iron alloys. They have 76% 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 M34 steel and the bottom bar is ASTM A232 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 800 to 2170
1790

Thermal Properties

Latent Heat of Fusion, J/g 270
250
Melting Completion (Liquidus), °C 1540
1460
Melting Onset (Solidus), °C 1500
1410
Specific Heat Capacity, J/kg-K 450
470
Thermal Conductivity, W/m-K 24
52
Thermal Expansion, µm/m-K 12
13

Otherwise Unclassified Properties

Base Metal Price, % relative 32
2.3
Density, g/cm3 8.2
7.8
Embodied Carbon, kg CO2/kg material 9.5
2.0
Embodied Energy, MJ/kg 140
28
Embodied Water, L/kg 150
51

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 27 to 74
64
Strength to Weight: Bending, points 23 to 46
42
Thermal Diffusivity, mm2/s 6.7
14
Thermal Shock Resistance, points 25 to 67
53

Alloy Composition

Carbon (C), % 0.85 to 0.92
0.48 to 0.53
Chromium (Cr), % 3.5 to 4.0
0.8 to 1.1
Cobalt (Co), % 7.8 to 8.8
0
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 71.3 to 76.5
96.8 to 97.7
Manganese (Mn), % 0.15 to 0.4
0.7 to 0.9
Molybdenum (Mo), % 7.8 to 9.2
0
Nickel (Ni), % 0 to 0.3
0
Phosphorus (P), % 0 to 0.030
0 to 0.020
Silicon (Si), % 0.2 to 0.45
0.15 to 0.35
Sulfur (S), % 0 to 0.030
0 to 0.035
Tungsten (W), % 1.4 to 2.1
0
Vanadium (V), % 1.9 to 2.3
0.15 to 0.3