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EN 1.4971 Stainless Steel vs. EN 1.7701 Steel

Both EN 1.4971 stainless steel and EN 1.7701 steel are iron alloys. They have a modest 33% of their average alloy composition in common, which, by itself, doesn't mean much. There are 23 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 EN 1.4971 stainless steel and the bottom bar is EN 1.7701 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 240
200 to 480
Elastic (Young's, Tensile) Modulus, GPa 210
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 81
73
Tensile Strength: Ultimate (UTS), MPa 800
670 to 2010

Thermal Properties

Latent Heat of Fusion, J/g 300
250
Maximum Temperature: Mechanical, °C 1100
420
Melting Completion (Liquidus), °C 1460
1460
Melting Onset (Solidus), °C 1410
1420
Specific Heat Capacity, J/kg-K 450
470
Thermal Conductivity, W/m-K 13
44
Thermal Expansion, µm/m-K 15
13

Otherwise Unclassified Properties

Base Metal Price, % relative 70
2.6
Density, g/cm3 8.4
7.8
Embodied Carbon, kg CO2/kg material 7.6
1.9
Embodied Energy, MJ/kg 110
26
Embodied Water, L/kg 300
52

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 26
24 to 71
Strength to Weight: Bending, points 23
22 to 45
Thermal Diffusivity, mm2/s 3.4
12
Thermal Shock Resistance, points 19
20 to 59

Alloy Composition

Carbon (C), % 0.080 to 0.16
0.48 to 0.56
Chromium (Cr), % 20 to 22.5
0.9 to 1.2
Cobalt (Co), % 18.5 to 21
0
Iron (Fe), % 24.3 to 37.1
96.2 to 97.7
Manganese (Mn), % 0 to 2.0
0.7 to 1.1
Molybdenum (Mo), % 2.5 to 3.5
0.15 to 0.3
Nickel (Ni), % 19 to 21
0
Niobium (Nb), % 0.75 to 1.3
0
Nitrogen (N), % 0.1 to 0.2
0
Phosphorus (P), % 0 to 0.035
0 to 0.025
Silicon (Si), % 0 to 1.0
0 to 0.4
Sulfur (S), % 0 to 0.015
0 to 0.025
Tungsten (W), % 2.0 to 3.0
0
Vanadium (V), % 0
0.1 to 0.2