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S31655 Stainless Steel vs. SAE-AISI M34 Steel

Both S31655 stainless steel and SAE-AISI M34 steel are iron alloys. They have 73% 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 S31655 stainless steel and the bottom bar is SAE-AISI M34 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 78
77
Tensile Strength: Ultimate (UTS), MPa 710
800 to 2170

Thermal Properties

Latent Heat of Fusion, J/g 290
270
Melting Completion (Liquidus), °C 1430
1540
Melting Onset (Solidus), °C 1380
1500
Specific Heat Capacity, J/kg-K 480
450
Thermal Conductivity, W/m-K 15
24
Thermal Expansion, µm/m-K 16
12

Otherwise Unclassified Properties

Base Metal Price, % relative 17
32
Density, g/cm3 7.8
8.2
Embodied Carbon, kg CO2/kg material 3.3
9.5
Embodied Energy, MJ/kg 46
140
Embodied Water, L/kg 160
150

Common Calculations

PREN (Pitting Resistance) 27
35
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 25
27 to 74
Strength to Weight: Bending, points 23
23 to 46
Thermal Diffusivity, mm2/s 4.0
6.7
Thermal Shock Resistance, points 16
25 to 67

Alloy Composition

Carbon (C), % 0 to 0.030
0.85 to 0.92
Chromium (Cr), % 19.5 to 21.5
3.5 to 4.0
Cobalt (Co), % 0
7.8 to 8.8
Copper (Cu), % 0 to 1.0
0 to 0.25
Iron (Fe), % 63.2 to 71.9
71.3 to 76.5
Manganese (Mn), % 0 to 2.0
0.15 to 0.4
Molybdenum (Mo), % 0.5 to 1.5
7.8 to 9.2
Nickel (Ni), % 8.0 to 9.5
0 to 0.3
Nitrogen (N), % 0.14 to 0.25
0
Phosphorus (P), % 0 to 0.045
0 to 0.030
Silicon (Si), % 0 to 1.0
0.2 to 0.45
Sulfur (S), % 0 to 0.015
0 to 0.030
Tungsten (W), % 0
1.4 to 2.1
Vanadium (V), % 0
1.9 to 2.3