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SAE-AISI D7 Steel vs. EN 1.4729 Stainless Steel

Both SAE-AISI D7 steel and EN 1.4729 stainless steel are iron alloys. They have a moderately high 93% of their average alloy composition in common. There are 18 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 1.4729 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

Thermal Properties

Latent Heat of Fusion, J/g 270
300
Melting Completion (Liquidus), °C 1440
1420
Melting Onset (Solidus), °C 1400
1380
Specific Heat Capacity, J/kg-K 480
490
Thermal Conductivity, W/m-K 27
24
Thermal Expansion, µm/m-K 11
10

Otherwise Unclassified Properties

Base Metal Price, % relative 10
7.5
Density, g/cm3 7.6
7.6
Embodied Carbon, kg CO2/kg material 11
2.1
Embodied Energy, MJ/kg 180
29
Embodied Water, L/kg 130
100

Common Calculations

PREN (Pitting Resistance) 16
14
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Thermal Diffusivity, mm2/s 7.4
6.5

Alloy Composition

Carbon (C), % 2.2 to 2.5
0.3 to 0.5
Chromium (Cr), % 11.5 to 13.5
12 to 14
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 76.6 to 81.9
80.4 to 86.7
Manganese (Mn), % 0 to 0.6
0 to 1.0
Molybdenum (Mo), % 0.7 to 1.2
0 to 0.5
Nickel (Ni), % 0 to 0.3
0 to 1.0
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 0 to 0.6
1.0 to 2.5
Sulfur (S), % 0 to 0.030
0 to 0.030
Vanadium (V), % 3.8 to 4.4
0