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EN 1.4971 Stainless Steel vs. EN 1.4887 Stainless Steel

Both EN 1.4971 stainless steel and EN 1.4887 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 31 material properties with values for both materials. Properties with values for just one material (2, 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 1.4887 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 240
170
Elastic (Young's, Tensile) Modulus, GPa 210
200
Elongation at Break, % 34
45
Fatigue Strength, MPa 270
280
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 81
76
Shear Strength, MPa 530
400
Tensile Strength: Ultimate (UTS), MPa 800
580
Tensile Strength: Yield (Proof), MPa 340
300

Thermal Properties

Latent Heat of Fusion, J/g 300
320
Maximum Temperature: Corrosion, °C 570
600
Maximum Temperature: Mechanical, °C 1100
1100
Melting Completion (Liquidus), °C 1460
1390
Melting Onset (Solidus), °C 1410
1350
Specific Heat Capacity, J/kg-K 450
480
Thermal Conductivity, W/m-K 13
12
Thermal Expansion, µm/m-K 15
15

Otherwise Unclassified Properties

Base Metal Price, % relative 70
39
Density, g/cm3 8.4
8.0
Embodied Carbon, kg CO2/kg material 7.6
6.7
Embodied Energy, MJ/kg 110
96
Embodied Water, L/kg 300
210

Common Calculations

PREN (Pitting Resistance) 38
22
Resilience: Ultimate (Unit Rupture Work), MJ/m3 220
220
Resilience: Unit (Modulus of Resilience), kJ/m3 280
230
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 26
20
Strength to Weight: Bending, points 23
19
Thermal Diffusivity, mm2/s 3.4
3.2
Thermal Shock Resistance, points 19
14

Alloy Composition

Carbon (C), % 0.080 to 0.16
0 to 0.15
Chromium (Cr), % 20 to 22.5
20 to 23
Cobalt (Co), % 18.5 to 21
0
Iron (Fe), % 24.3 to 37.1
34.2 to 45
Manganese (Mn), % 0 to 2.0
0 to 2.0
Molybdenum (Mo), % 2.5 to 3.5
0
Nickel (Ni), % 19 to 21
33 to 37
Niobium (Nb), % 0.75 to 1.3
1.0 to 1.5
Nitrogen (N), % 0.1 to 0.2
0 to 0.1
Phosphorus (P), % 0 to 0.035
0 to 0.030
Silicon (Si), % 0 to 1.0
1.0 to 2.0
Sulfur (S), % 0 to 0.015
0 to 0.015
Tungsten (W), % 2.0 to 3.0
0