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EN 1.4971 Stainless Steel vs. AWS ER70S-A1

Both EN 1.4971 stainless steel and AWS ER70S-A1 are iron alloys. They have a modest 33% of their average alloy composition in common, which, by itself, doesn't mean much. There are 25 material properties with values for both materials. Properties with values for just one material (8, 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 AWS ER70S-A1.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
190
Elongation at Break, % 34
22
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 81
73
Tensile Strength: Ultimate (UTS), MPa 800
590
Tensile Strength: Yield (Proof), MPa 340
450

Thermal Properties

Latent Heat of Fusion, J/g 300
260
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
50
Thermal Expansion, µm/m-K 15
13

Otherwise Unclassified Properties

Base Metal Price, % relative 70
2.5
Density, g/cm3 8.4
7.8
Embodied Carbon, kg CO2/kg material 7.6
1.5
Embodied Energy, MJ/kg 110
20
Embodied Water, L/kg 300
48

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 220
120
Resilience: Unit (Modulus of Resilience), kJ/m3 280
540
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 26
21
Strength to Weight: Bending, points 23
20
Thermal Diffusivity, mm2/s 3.4
14
Thermal Shock Resistance, points 19
17

Alloy Composition

Carbon (C), % 0.080 to 0.16
0 to 0.12
Chromium (Cr), % 20 to 22.5
0
Cobalt (Co), % 18.5 to 21
0
Copper (Cu), % 0
0 to 0.35
Iron (Fe), % 24.3 to 37.1
96.1 to 99.3
Manganese (Mn), % 0 to 2.0
0 to 1.3
Molybdenum (Mo), % 2.5 to 3.5
0.4 to 0.65
Nickel (Ni), % 19 to 21
0 to 0.2
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
0.3 to 0.7
Sulfur (S), % 0 to 0.015
0 to 0.025
Tungsten (W), % 2.0 to 3.0
0
Residuals, % 0
0 to 0.5