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EN 1.4971 Stainless Steel vs. EN 1.1158 Steel

Both EN 1.4971 stainless steel and EN 1.1158 steel are iron alloys. They have a modest 32% of their average alloy composition in common, which, by itself, doesn't mean much. There are 29 material properties with values for both materials. Properties with values for just one material (5, 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 1.1158 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 240
140 to 150
Elastic (Young's, Tensile) Modulus, GPa 210
190
Elongation at Break, % 34
23 to 24
Fatigue Strength, MPa 270
170 to 220
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 81
73
Shear Strength, MPa 530
300 to 320
Tensile Strength: Ultimate (UTS), MPa 800
470 to 500
Tensile Strength: Yield (Proof), MPa 340
240 to 310

Thermal Properties

Latent Heat of Fusion, J/g 300
250
Maximum Temperature: Mechanical, °C 1100
400
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
49
Thermal Expansion, µm/m-K 15
12

Otherwise Unclassified Properties

Base Metal Price, % relative 70
2.1
Density, g/cm3 8.4
7.8
Embodied Carbon, kg CO2/kg material 7.6
1.4
Embodied Energy, MJ/kg 110
19
Embodied Water, L/kg 300
47

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 220
89 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 280
150 to 250
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 26
17 to 18
Strength to Weight: Bending, points 23
17 to 18
Thermal Diffusivity, mm2/s 3.4
13
Thermal Shock Resistance, points 19
15 to 16

Alloy Composition

Carbon (C), % 0.080 to 0.16
0.22 to 0.29
Chromium (Cr), % 20 to 22.5
0 to 0.4
Cobalt (Co), % 18.5 to 21
0
Iron (Fe), % 24.3 to 37.1
97.6 to 99.38
Manganese (Mn), % 0 to 2.0
0.4 to 0.7
Molybdenum (Mo), % 2.5 to 3.5
0 to 0.1
Nickel (Ni), % 19 to 21
0 to 0.4
Niobium (Nb), % 0.75 to 1.3
0
Nitrogen (N), % 0.1 to 0.2
0
Phosphorus (P), % 0 to 0.035
0 to 0.035
Silicon (Si), % 0 to 1.0
0 to 0.4
Sulfur (S), % 0 to 0.015
0 to 0.035
Tungsten (W), % 2.0 to 3.0
0