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SAE-AISI D7 Steel vs. EN 1.4903 Stainless Steel

Both SAE-AISI D7 steel and EN 1.4903 stainless steel are iron alloys. They have a moderately high 90% of their average alloy composition in common. There are 22 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI D7 steel and the bottom bar is EN 1.4903 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
670 to 680

Thermal Properties

Latent Heat of Fusion, J/g 270
270
Melting Completion (Liquidus), °C 1440
1460
Melting Onset (Solidus), °C 1400
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 27
26
Thermal Expansion, µm/m-K 11
11

Otherwise Unclassified Properties

Base Metal Price, % relative 10
7.0
Density, g/cm3 7.6
7.8
Embodied Carbon, kg CO2/kg material 11
2.6
Embodied Energy, MJ/kg 180
36
Embodied Water, L/kg 130
88

Common Calculations

PREN (Pitting Resistance) 16
13
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 29 to 78
24
Strength to Weight: Bending, points 25 to 48
22
Thermal Diffusivity, mm2/s 7.4
7.0
Thermal Shock Resistance, points 27 to 72
23

Alloy Composition

Aluminum (Al), % 0
0 to 0.040
Carbon (C), % 2.2 to 2.5
0.080 to 0.12
Chromium (Cr), % 11.5 to 13.5
8.0 to 9.5
Copper (Cu), % 0 to 0.25
0 to 0.3
Iron (Fe), % 76.6 to 81.9
87.1 to 90.5
Manganese (Mn), % 0 to 0.6
0.3 to 0.6
Molybdenum (Mo), % 0.7 to 1.2
0.85 to 1.1
Nickel (Ni), % 0 to 0.3
0 to 0.4
Niobium (Nb), % 0
0.060 to 0.1
Nitrogen (N), % 0
0.030 to 0.070
Phosphorus (P), % 0 to 0.030
0 to 0.025
Silicon (Si), % 0 to 0.6
0 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.015
Vanadium (V), % 3.8 to 4.4
0.18 to 0.25