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SAE-AISI M30 Steel vs. SAE-AISI S7 Steel

Both SAE-AISI M30 steel and SAE-AISI S7 steel are iron alloys. They have 84% of their average alloy composition in common. There are 22 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI M30 steel and the bottom bar is SAE-AISI S7 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 78
74
Tensile Strength: Ultimate (UTS), MPa 800 to 2170
670 to 2030

Thermal Properties

Latent Heat of Fusion, J/g 270
260
Melting Completion (Liquidus), °C 1550
1460
Melting Onset (Solidus), °C 1500
1420
Specific Heat Capacity, J/kg-K 450
470
Thermal Conductivity, W/m-K 24
40
Thermal Expansion, µm/m-K 12
12

Otherwise Unclassified Properties

Base Metal Price, % relative 26
5.0
Density, g/cm3 8.2
7.8
Embodied Carbon, kg CO2/kg material 7.2
2.3
Embodied Energy, MJ/kg 100
31
Embodied Water, L/kg 120
65

Common Calculations

PREN (Pitting Resistance) 35
8.4
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 27 to 74
24 to 72
Strength to Weight: Bending, points 24 to 46
22 to 46
Thermal Diffusivity, mm2/s 6.6
11
Thermal Shock Resistance, points 25 to 67
22 to 66

Alloy Composition

Carbon (C), % 0.75 to 0.85
0.45 to 0.55
Chromium (Cr), % 3.5 to 4.3
3.0 to 3.5
Cobalt (Co), % 4.5 to 5.5
0
Copper (Cu), % 0 to 0.25
0 to 0.25
Iron (Fe), % 75.2 to 80.9
91.6 to 94.9
Manganese (Mn), % 0.15 to 0.4
0.2 to 0.9
Molybdenum (Mo), % 7.8 to 9.0
1.3 to 1.8
Nickel (Ni), % 0 to 0.3
0
Phosphorus (P), % 0 to 0.030
0 to 0.030
Silicon (Si), % 0.2 to 0.45
0.2 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 1.3 to 2.3
0
Vanadium (V), % 1.0 to 1.4
0 to 0.3

Comparable Variants