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SAE-AISI M34 Steel vs. AISI 431 Stainless Steel

Both SAE-AISI M34 steel and AISI 431 stainless steel are iron alloys. They have 79% of their average alloy composition in common. There are 22 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI M34 steel and the bottom bar is AISI 431 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 77
77
Tensile Strength: Ultimate (UTS), MPa 800 to 2170
890 to 1380

Thermal Properties

Latent Heat of Fusion, J/g 270
280
Melting Completion (Liquidus), °C 1540
1510
Melting Onset (Solidus), °C 1500
1450
Specific Heat Capacity, J/kg-K 450
480
Thermal Conductivity, W/m-K 24
26
Thermal Expansion, µm/m-K 12
12

Otherwise Unclassified Properties

Base Metal Price, % relative 32
9.0
Density, g/cm3 8.2
7.7
Embodied Carbon, kg CO2/kg material 9.5
2.2
Embodied Energy, MJ/kg 140
31
Embodied Water, L/kg 150
120

Common Calculations

PREN (Pitting Resistance) 35
16
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 27 to 74
32 to 50
Strength to Weight: Bending, points 23 to 46
27 to 36
Thermal Diffusivity, mm2/s 6.7
7.0
Thermal Shock Resistance, points 25 to 67
28 to 43

Alloy Composition

Carbon (C), % 0.85 to 0.92
0 to 0.2
Chromium (Cr), % 3.5 to 4.0
15 to 17
Cobalt (Co), % 7.8 to 8.8
0
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 71.3 to 76.5
78.2 to 83.8
Manganese (Mn), % 0.15 to 0.4
0 to 1.0
Molybdenum (Mo), % 7.8 to 9.2
0
Nickel (Ni), % 0 to 0.3
1.3 to 2.5
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 0.2 to 0.45
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 1.4 to 2.1
0
Vanadium (V), % 1.9 to 2.3
0

Comparable Variants