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EN 1.4971 Stainless Steel vs. EN 1.4557 Stainless Steel

Both EN 1.4971 stainless steel and EN 1.4557 stainless steel are iron alloys. Both are furnished in the solution annealed (AT) condition. They have 73% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (4, 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 1.4557 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 240
160
Elastic (Young's, Tensile) Modulus, GPa 210
200
Elongation at Break, % 34
40
Fatigue Strength, MPa 270
260
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 81
80
Tensile Strength: Ultimate (UTS), MPa 800
560
Tensile Strength: Yield (Proof), MPa 340
300

Thermal Properties

Latent Heat of Fusion, J/g 300
300
Maximum Temperature: Corrosion, °C 570
420
Maximum Temperature: Mechanical, °C 1100
1090
Melting Completion (Liquidus), °C 1460
1460
Melting Onset (Solidus), °C 1410
1420
Specific Heat Capacity, J/kg-K 450
460
Thermal Conductivity, W/m-K 13
15
Thermal Expansion, µm/m-K 15
17

Otherwise Unclassified Properties

Base Metal Price, % relative 70
29
Density, g/cm3 8.4
8.0
Embodied Carbon, kg CO2/kg material 7.6
5.6
Embodied Energy, MJ/kg 110
76
Embodied Water, L/kg 300
190

Common Calculations

PREN (Pitting Resistance) 38
45
Resilience: Ultimate (Unit Rupture Work), MJ/m3 220
190
Resilience: Unit (Modulus of Resilience), kJ/m3 280
210
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 26
19
Strength to Weight: Bending, points 23
19
Thermal Diffusivity, mm2/s 3.4
4.0
Thermal Shock Resistance, points 19
12

Alloy Composition

Carbon (C), % 0.080 to 0.16
0 to 0.020
Chromium (Cr), % 20 to 22.5
19.5 to 20.5
Cobalt (Co), % 18.5 to 21
0
Copper (Cu), % 0
0.5 to 1.0
Iron (Fe), % 24.3 to 37.1
49.5 to 56.3
Manganese (Mn), % 0 to 2.0
0 to 1.2
Molybdenum (Mo), % 2.5 to 3.5
6.0 to 7.0
Nickel (Ni), % 19 to 21
17.5 to 19.5
Niobium (Nb), % 0.75 to 1.3
0
Nitrogen (N), % 0.1 to 0.2
0.18 to 0.24
Phosphorus (P), % 0 to 0.035
0 to 0.030
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.010
Tungsten (W), % 2.0 to 3.0
0