SAE-AISI M41 Steel vs. SAE-AISI A7 Steel
Both SAE-AISI M41 steel and SAE-AISI A7 steel are iron alloys. They have 87% of their average alloy composition in common.
For each property being compared, the top bar is SAE-AISI M41 steel and the bottom bar is SAE-AISI A7 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 | |
72 |
Tensile Strength: Ultimate (UTS), MPa | 800 to 2290 | |
800 to 2150 |
Thermal Properties
Latent Heat of Fusion, J/g | 260 | |
260 |
Melting Completion (Liquidus), °C | 1600 | |
1470 |
Melting Onset (Solidus), °C | 1550 | |
1430 |
Specific Heat Capacity, J/kg-K | 440 | |
470 |
Thermal Conductivity, W/m-K | 22 | |
37 |
Thermal Expansion, µm/m-K | 12 | |
12 |
Otherwise Unclassified Properties
Base Metal Price, % relative | 33 | |
10 |
Density, g/cm3 | 8.4 | |
7.7 |
Embodied Carbon, kg CO2/kg material | 9.1 | |
13 |
Embodied Energy, MJ/kg | 140 | |
200 |
Embodied Water, L/kg | 120 | |
100 |
Common Calculations
PREN (Pitting Resistance) | 28 | |
11 |
Stiffness to Weight: Axial, points | 13 | |
13 |
Stiffness to Weight: Bending, points | 23 | |
25 |
Strength to Weight: Axial, points | 26 to 76 | |
29 to 77 |
Strength to Weight: Bending, points | 23 to 46 | |
25 to 48 |
Thermal Diffusivity, mm2/s | 6.0 | |
10 |
Thermal Shock Resistance, points | 25 to 71 | |
27 to 72 |
Alloy Composition
Carbon (C), % | 1.1 to 1.2 | |
2.0 to 2.9 |
Chromium (Cr), % | 3.8 to 4.5 | |
5.0 to 5.8 |
Cobalt (Co), % | 4.8 to 5.8 | |
0 |
Copper (Cu), % | 0 to 0.25 | |
0 to 0.25 |
Iron (Fe), % | 73.4 to 78.9 | |
81.4 to 87.7 |
Manganese (Mn), % | 0.2 to 0.6 | |
0 to 0.8 |
Molybdenum (Mo), % | 3.3 to 4.3 | |
0.9 to 1.4 |
Nickel (Ni), % | 0 to 0.3 | |
0 to 0.3 |
Phosphorus (P), % | 0 to 0.030 | |
0 to 0.030 |
Silicon (Si), % | 0.15 to 0.5 | |
0 to 0.5 |
Sulfur (S), % | 0 to 0.030 | |
0 to 0.030 |
Tungsten (W), % | 6.3 to 7.0 | |
0.5 to 1.5 |
Vanadium (V), % | 1.8 to 2.3 | |
3.9 to 5.2 |