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SAE-AISI M43 Steel vs. S17700 Stainless Steel

Both SAE-AISI M43 steel and S17700 stainless steel are iron alloys. They have 78% 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 M43 steel and the bottom bar is S17700 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
76
Tensile Strength: Ultimate (UTS), MPa 810 to 2290
1180 to 1650

Thermal Properties

Latent Heat of Fusion, J/g 270
290
Melting Completion (Liquidus), °C 1550
1440
Melting Onset (Solidus), °C 1500
1400
Specific Heat Capacity, J/kg-K 450
480
Thermal Conductivity, W/m-K 19
15
Thermal Expansion, µm/m-K 12
11

Otherwise Unclassified Properties

Base Metal Price, % relative 33
13
Density, g/cm3 8.2
7.7
Embodied Carbon, kg CO2/kg material 8.5
2.8
Embodied Energy, MJ/kg 120
40
Embodied Water, L/kg 140
150

Common Calculations

PREN (Pitting Resistance) 35
17
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 27 to 77
42 to 59
Strength to Weight: Bending, points 24 to 47
32 to 40
Thermal Diffusivity, mm2/s 5.3
4.1
Thermal Shock Resistance, points 25 to 71
39 to 54

Alloy Composition

Aluminum (Al), % 0
0.75 to 1.5
Carbon (C), % 1.2 to 1.3
0 to 0.090
Chromium (Cr), % 3.5 to 4.3
16 to 18
Cobalt (Co), % 7.8 to 8.8
0
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 70.8 to 76
70.5 to 76.8
Manganese (Mn), % 0.2 to 0.4
0 to 1.0
Molybdenum (Mo), % 7.5 to 8.5
0
Nickel (Ni), % 0 to 0.3
6.5 to 7.8
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 0.15 to 0.65
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 2.3 to 3.0
0
Vanadium (V), % 1.5 to 1.8
0

Comparable Variants