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SAE-AISI D7 Steel vs. S15500 Stainless Steel

Both SAE-AISI D7 steel and S15500 stainless steel are iron alloys. They have 89% of their average alloy composition in common. There are 22 material properties with values for both materials. Properties with values for just one material (14, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI D7 steel and the bottom bar is S15500 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 73
75
Tensile Strength: Ultimate (UTS), MPa 800 to 2120
890 to 1490

Thermal Properties

Latent Heat of Fusion, J/g 270
280
Melting Completion (Liquidus), °C 1440
1430
Melting Onset (Solidus), °C 1400
1380
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 27
17
Thermal Expansion, µm/m-K 11
11

Otherwise Unclassified Properties

Base Metal Price, % relative 10
13
Density, g/cm3 7.6
7.8
Embodied Carbon, kg CO2/kg material 11
2.7
Embodied Energy, MJ/kg 180
39
Embodied Water, L/kg 130
130

Common Calculations

PREN (Pitting Resistance) 16
15
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 29 to 78
32 to 53
Strength to Weight: Bending, points 25 to 48
26 to 37
Thermal Diffusivity, mm2/s 7.4
4.6
Thermal Shock Resistance, points 27 to 72
30 to 50

Alloy Composition

Carbon (C), % 2.2 to 2.5
0 to 0.070
Chromium (Cr), % 11.5 to 13.5
14 to 15.5
Copper (Cu), % 0 to 0.25
2.5 to 4.5
Iron (Fe), % 76.6 to 81.9
71.9 to 79.9
Manganese (Mn), % 0 to 0.6
0 to 1.0
Molybdenum (Mo), % 0.7 to 1.2
0
Nickel (Ni), % 0 to 0.3
3.5 to 5.5
Niobium (Nb), % 0
0.15 to 0.45
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 0 to 0.6
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030
Vanadium (V), % 3.8 to 4.4
0