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SAE-AISI A3 Steel vs. SAE-AISI M30 Steel

Both SAE-AISI A3 steel and SAE-AISI M30 steel are iron alloys. They have 86% 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 A3 steel and the bottom bar is SAE-AISI M30 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
78
Tensile Strength: Ultimate (UTS), MPa 700 to 2150
800 to 2170

Thermal Properties

Latent Heat of Fusion, J/g 260
270
Melting Completion (Liquidus), °C 1450
1550
Melting Onset (Solidus), °C 1410
1500
Specific Heat Capacity, J/kg-K 470
450
Thermal Conductivity, W/m-K 37
24
Thermal Expansion, µm/m-K 12
12

Otherwise Unclassified Properties

Base Metal Price, % relative 6.0
26
Density, g/cm3 7.8
8.2
Embodied Carbon, kg CO2/kg material 4.4
7.2
Embodied Energy, MJ/kg 67
100
Embodied Water, L/kg 78
120

Common Calculations

PREN (Pitting Resistance) 8.9
35
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 25 to 77
27 to 74
Strength to Weight: Bending, points 23 to 48
24 to 46
Thermal Diffusivity, mm2/s 10
6.6
Thermal Shock Resistance, points 23 to 70
25 to 67

Alloy Composition

Carbon (C), % 1.2 to 1.3
0.75 to 0.85
Chromium (Cr), % 4.8 to 5.5
3.5 to 4.3
Cobalt (Co), % 0
4.5 to 5.5
Copper (Cu), % 0 to 0.25
0 to 0.25
Iron (Fe), % 88.7 to 92
75.2 to 80.9
Manganese (Mn), % 0.4 to 0.6
0.15 to 0.4
Molybdenum (Mo), % 0.9 to 1.4
7.8 to 9.0
Nickel (Ni), % 0 to 0.3
0 to 0.3
Phosphorus (P), % 0 to 0.030
0 to 0.030
Silicon (Si), % 0 to 0.5
0.2 to 0.45
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 0
1.3 to 2.3
Vanadium (V), % 0.8 to 1.4
1.0 to 1.4

Comparable Variants