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SAE-AISI D7 Steel vs. EN 1.4938 Stainless Steel

Both SAE-AISI D7 steel and EN 1.4938 stainless steel are iron alloys. They have a moderately high 93% of their average alloy composition in common. There are 22 material properties with values for both materials. Properties with values for just one material (10, 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 1.4938 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 73
76
Tensile Strength: Ultimate (UTS), MPa 800 to 2120
870 to 1030

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
30
Thermal Expansion, µm/m-K 11
11

Otherwise Unclassified Properties

Base Metal Price, % relative 10
10
Density, g/cm3 7.6
7.8
Embodied Carbon, kg CO2/kg material 11
3.3
Embodied Energy, MJ/kg 180
47
Embodied Water, L/kg 130
110

Common Calculations

PREN (Pitting Resistance) 16
18
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 29 to 78
31 to 37
Strength to Weight: Bending, points 25 to 48
26 to 29
Thermal Diffusivity, mm2/s 7.4
8.1
Thermal Shock Resistance, points 27 to 72
30 to 35

Alloy Composition

Carbon (C), % 2.2 to 2.5
0.080 to 0.15
Chromium (Cr), % 11.5 to 13.5
11 to 12.5
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 76.6 to 81.9
80.5 to 84.8
Manganese (Mn), % 0 to 0.6
0.4 to 0.9
Molybdenum (Mo), % 0.7 to 1.2
1.5 to 2.0
Nickel (Ni), % 0 to 0.3
2.0 to 3.0
Nitrogen (N), % 0
0.020 to 0.040
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
0.25 to 0.4

Comparable Variants