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SAE-AISI M41 Steel vs. ASTM A232 Spring Steel

Both SAE-AISI M41 steel and ASTM A232 spring steel are iron alloys. They have 79% 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 M41 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 2290
1790

Thermal Properties

Latent Heat of Fusion, J/g 260
250
Melting Completion (Liquidus), °C 1600
1460
Melting Onset (Solidus), °C 1550
1410
Specific Heat Capacity, J/kg-K 440
470
Thermal Conductivity, W/m-K 22
52
Thermal Expansion, µm/m-K 12
13

Otherwise Unclassified Properties

Base Metal Price, % relative 33
2.3
Density, g/cm3 8.4
7.8
Embodied Carbon, kg CO2/kg material 9.1
2.0
Embodied Energy, MJ/kg 140
28
Embodied Water, L/kg 120
51

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 26 to 76
64
Strength to Weight: Bending, points 23 to 46
42
Thermal Diffusivity, mm2/s 6.0
14
Thermal Shock Resistance, points 25 to 71
53

Alloy Composition

Carbon (C), % 1.1 to 1.2
0.48 to 0.53
Chromium (Cr), % 3.8 to 4.5
0.8 to 1.1
Cobalt (Co), % 4.8 to 5.8
0
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 73.4 to 78.9
96.8 to 97.7
Manganese (Mn), % 0.2 to 0.6
0.7 to 0.9
Molybdenum (Mo), % 3.3 to 4.3
0
Nickel (Ni), % 0 to 0.3
0
Phosphorus (P), % 0 to 0.030
0 to 0.020
Silicon (Si), % 0.15 to 0.5
0.15 to 0.35
Sulfur (S), % 0 to 0.030
0 to 0.035
Tungsten (W), % 6.3 to 7.0
0
Vanadium (V), % 1.8 to 2.3
0.15 to 0.3