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R30556 Alloy vs. SAE-AISI M7 Steel

Both R30556 alloy and SAE-AISI M7 steel are iron alloys. They have a modest 39% of their average alloy composition in common, which, by itself, doesn't mean much. There are 22 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is R30556 alloy and the bottom bar is SAE-AISI M7 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
200
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 81
77
Tensile Strength: Ultimate (UTS), MPa 780
760 to 2210

Thermal Properties

Latent Heat of Fusion, J/g 300
270
Melting Completion (Liquidus), °C 1420
1560
Melting Onset (Solidus), °C 1330
1510
Specific Heat Capacity, J/kg-K 450
450
Thermal Conductivity, W/m-K 11
28
Thermal Expansion, µm/m-K 15
12

Otherwise Unclassified Properties

Base Metal Price, % relative 70
18
Density, g/cm3 8.4
8.1
Embodied Carbon, kg CO2/kg material 8.7
8.9
Embodied Energy, MJ/kg 130
130
Embodied Water, L/kg 300
100

Common Calculations

PREN (Pitting Resistance) 40
35
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 26
26 to 76
Strength to Weight: Bending, points 22
23 to 47
Thermal Diffusivity, mm2/s 2.9
7.8
Thermal Shock Resistance, points 18
24 to 69

Alloy Composition

Aluminum (Al), % 0.1 to 0.5
0
Boron (B), % 0 to 0.020
0
Carbon (C), % 0.050 to 0.15
1.0 to 1.1
Chromium (Cr), % 21 to 23
3.5 to 4.0
Cobalt (Co), % 16 to 21
0
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 20.4 to 38.2
79.8 to 83.8
Lanthanum (La), % 0.0050 to 0.1
0
Manganese (Mn), % 0.5 to 2.0
0.15 to 0.4
Molybdenum (Mo), % 2.5 to 4.0
8.2 to 9.2
Nickel (Ni), % 19 to 22.5
0 to 0.3
Niobium (Nb), % 0 to 0.3
0
Nitrogen (N), % 0.1 to 0.3
0
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0.2 to 0.8
0.2 to 0.55
Sulfur (S), % 0 to 0.015
0 to 0.030
Tantalum (Ta), % 0.3 to 1.3
0
Tungsten (W), % 2.0 to 3.5
1.4 to 2.1
Vanadium (V), % 0
1.8 to 2.3
Zinc (Zn), % 0.0010 to 0.1
0