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EN 1.4971 Stainless Steel vs. EN 1.4458 Stainless Steel

Both EN 1.4971 stainless steel and EN 1.4458 stainless steel are iron alloys. Both are furnished in the solution annealed (AT) condition. They have 75% 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 1.4458 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 240
150
Elastic (Young's, Tensile) Modulus, GPa 210
200
Elongation at Break, % 34
34
Fatigue Strength, MPa 270
150
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 81
78
Tensile Strength: Ultimate (UTS), MPa 800
510
Tensile Strength: Yield (Proof), MPa 340
190

Thermal Properties

Latent Heat of Fusion, J/g 300
300
Maximum Temperature: Corrosion, °C 570
430
Maximum Temperature: Mechanical, °C 1100
1100
Melting Completion (Liquidus), °C 1460
1420
Melting Onset (Solidus), °C 1410
1370
Specific Heat Capacity, J/kg-K 450
470
Thermal Conductivity, W/m-K 13
16
Thermal Expansion, µm/m-K 15
15

Otherwise Unclassified Properties

Base Metal Price, % relative 70
30
Density, g/cm3 8.4
8.0
Embodied Carbon, kg CO2/kg material 7.6
5.4
Embodied Energy, MJ/kg 110
75
Embodied Water, L/kg 300
200

Common Calculations

PREN (Pitting Resistance) 38
30
Resilience: Ultimate (Unit Rupture Work), MJ/m3 220
140
Resilience: Unit (Modulus of Resilience), kJ/m3 280
89
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 26
17
Strength to Weight: Bending, points 23
18
Thermal Diffusivity, mm2/s 3.4
4.2
Thermal Shock Resistance, points 19
12

Alloy Composition

Carbon (C), % 0.080 to 0.16
0 to 0.030
Chromium (Cr), % 20 to 22.5
19 to 22
Cobalt (Co), % 18.5 to 21
0
Copper (Cu), % 0
0 to 2.0
Iron (Fe), % 24.3 to 37.1
40.2 to 53
Manganese (Mn), % 0 to 2.0
0 to 2.0
Molybdenum (Mo), % 2.5 to 3.5
2.0 to 2.5
Nickel (Ni), % 19 to 21
26 to 30
Niobium (Nb), % 0.75 to 1.3
0
Nitrogen (N), % 0.1 to 0.2
0 to 0.2
Phosphorus (P), % 0 to 0.035
0 to 0.035
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.025
Tungsten (W), % 2.0 to 3.0
0