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SAE-AISI M1 Steel vs. SAE-AISI H41 Steel

Both SAE-AISI M1 steel and SAE-AISI H41 steel are iron alloys. Their average alloy composition is basically identical.

For each property being compared, the top bar is SAE-AISI M1 steel and the bottom bar is SAE-AISI H41 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 77
77
Tensile Strength: Ultimate (UTS), MPa 730 to 2140
710 to 2210

Thermal Properties

Latent Heat of Fusion, J/g 270
270
Melting Completion (Liquidus), °C 1560
1560
Melting Onset (Solidus), °C 1510
1510
Specific Heat Capacity, J/kg-K 450
450
Thermal Conductivity, W/m-K 29
28
Thermal Expansion, µm/m-K 12
12

Otherwise Unclassified Properties

Base Metal Price, % relative 18
18
Density, g/cm3 8.1
8.1
Embodied Carbon, kg CO2/kg material 7.0
6.8
Embodied Energy, MJ/kg 99
97
Embodied Water, L/kg 98
97

Common Calculations

PREN (Pitting Resistance) 35
35
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 25 to 73
24 to 76
Strength to Weight: Bending, points 22 to 45
22 to 47
Thermal Diffusivity, mm2/s 8.0
7.7
Thermal Shock Resistance, points 23 to 66
20 to 64

Alloy Composition

Carbon (C), % 0.78 to 0.88
0.6 to 0.75
Chromium (Cr), % 3.5 to 4.0
3.5 to 4.0
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 81 to 84.8
81.8 to 85
Manganese (Mn), % 0.15 to 0.4
0.15 to 0.4
Molybdenum (Mo), % 8.2 to 9.2
8.2 to 9.2
Nickel (Ni), % 0 to 0.3
0
Phosphorus (P), % 0 to 0.030
0 to 0.030
Silicon (Si), % 0.2 to 0.5
0.2 to 0.45
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 1.4 to 2.1
1.4 to 2.1
Vanadium (V), % 1.0 to 1.4
1.0 to 1.3

Comparable Variants