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EN 1.4971 Stainless Steel vs. SAE-AISI D7 Steel

Both EN 1.4971 stainless steel and SAE-AISI D7 steel are iron alloys. They have 45% of their average alloy composition in common. There are 22 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is EN 1.4971 stainless steel and the bottom bar is SAE-AISI D7 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
190
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 81
73
Tensile Strength: Ultimate (UTS), MPa 800
800 to 2120

Thermal Properties

Latent Heat of Fusion, J/g 300
270
Melting Completion (Liquidus), °C 1460
1440
Melting Onset (Solidus), °C 1410
1400
Specific Heat Capacity, J/kg-K 450
480
Thermal Conductivity, W/m-K 13
27
Thermal Expansion, µm/m-K 15
11

Otherwise Unclassified Properties

Base Metal Price, % relative 70
10
Density, g/cm3 8.4
7.6
Embodied Carbon, kg CO2/kg material 7.6
11
Embodied Energy, MJ/kg 110
180
Embodied Water, L/kg 300
130

Common Calculations

PREN (Pitting Resistance) 38
16
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 26
29 to 78
Strength to Weight: Bending, points 23
25 to 48
Thermal Diffusivity, mm2/s 3.4
7.4
Thermal Shock Resistance, points 19
27 to 72

Alloy Composition

Carbon (C), % 0.080 to 0.16
2.2 to 2.5
Chromium (Cr), % 20 to 22.5
11.5 to 13.5
Cobalt (Co), % 18.5 to 21
0
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 24.3 to 37.1
76.6 to 81.9
Manganese (Mn), % 0 to 2.0
0 to 0.6
Molybdenum (Mo), % 2.5 to 3.5
0.7 to 1.2
Nickel (Ni), % 19 to 21
0 to 0.3
Niobium (Nb), % 0.75 to 1.3
0
Nitrogen (N), % 0.1 to 0.2
0
Phosphorus (P), % 0 to 0.035
0 to 0.030
Silicon (Si), % 0 to 1.0
0 to 0.6
Sulfur (S), % 0 to 0.015
0 to 0.030
Tungsten (W), % 2.0 to 3.0
0
Vanadium (V), % 0
3.8 to 4.4