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SAE-AISI M34 Steel vs. SAE-AISI M30 Steel

Both SAE-AISI M34 steel and SAE-AISI M30 steel are iron alloys. They have a very high 96% of their average alloy composition in common.

For each property being compared, the top bar is SAE-AISI M34 steel and the bottom bar is SAE-AISI M30 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
78
Tensile Strength: Ultimate (UTS), MPa 800 to 2170
800 to 2170

Thermal Properties

Latent Heat of Fusion, J/g 270
270
Melting Completion (Liquidus), °C 1540
1550
Melting Onset (Solidus), °C 1500
1500
Specific Heat Capacity, J/kg-K 450
450
Thermal Conductivity, W/m-K 24
24
Thermal Expansion, µm/m-K 12
12

Otherwise Unclassified Properties

Base Metal Price, % relative 32
26
Density, g/cm3 8.2
8.2
Embodied Carbon, kg CO2/kg material 9.5
7.2
Embodied Energy, MJ/kg 140
100
Embodied Water, L/kg 150
120

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 27 to 74
27 to 74
Strength to Weight: Bending, points 23 to 46
24 to 46
Thermal Diffusivity, mm2/s 6.7
6.6
Thermal Shock Resistance, points 25 to 67
25 to 67

Alloy Composition

Carbon (C), % 0.85 to 0.92
0.75 to 0.85
Chromium (Cr), % 3.5 to 4.0
3.5 to 4.3
Cobalt (Co), % 7.8 to 8.8
4.5 to 5.5
Copper (Cu), % 0 to 0.25
0 to 0.25
Iron (Fe), % 71.3 to 76.5
75.2 to 80.9
Manganese (Mn), % 0.15 to 0.4
0.15 to 0.4
Molybdenum (Mo), % 7.8 to 9.2
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), % 0.2 to 0.45
0.2 to 0.45
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 1.4 to 2.1
1.3 to 2.3
Vanadium (V), % 1.9 to 2.3
1.0 to 1.4

Comparable Variants