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EN 1.4971 Stainless Steel vs. EN 1.4640 Stainless Steel

Both EN 1.4971 stainless steel and EN 1.4640 stainless steel are iron alloys. They have 57% 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 1.4640 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 240
190 to 200
Elastic (Young's, Tensile) Modulus, GPa 210
200
Elongation at Break, % 34
51
Fatigue Strength, MPa 270
230 to 250
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 81
77
Shear Strength, MPa 530
440 to 460
Tensile Strength: Ultimate (UTS), MPa 800
620 to 650
Tensile Strength: Yield (Proof), MPa 340
240 to 260

Thermal Properties

Latent Heat of Fusion, J/g 300
280
Maximum Temperature: Corrosion, °C 570
420
Maximum Temperature: Mechanical, °C 1100
930
Melting Completion (Liquidus), °C 1460
1420
Melting Onset (Solidus), °C 1410
1380
Specific Heat Capacity, J/kg-K 450
480
Thermal Conductivity, W/m-K 13
15
Thermal Expansion, µm/m-K 15
16

Otherwise Unclassified Properties

Base Metal Price, % relative 70
14
Density, g/cm3 8.4
7.8
Embodied Carbon, kg CO2/kg material 7.6
2.8
Embodied Energy, MJ/kg 110
40
Embodied Water, L/kg 300
150

Common Calculations

PREN (Pitting Resistance) 38
20
Resilience: Ultimate (Unit Rupture Work), MJ/m3 220
250 to 260
Resilience: Unit (Modulus of Resilience), kJ/m3 280
150 to 170
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 26
22 to 23
Strength to Weight: Bending, points 23
21
Thermal Diffusivity, mm2/s 3.4
4.0
Thermal Shock Resistance, points 19
14 to 15

Alloy Composition

Carbon (C), % 0.080 to 0.16
0.030 to 0.080
Chromium (Cr), % 20 to 22.5
18 to 19
Cobalt (Co), % 18.5 to 21
0
Copper (Cu), % 0
1.3 to 2.0
Iron (Fe), % 24.3 to 37.1
67.4 to 73.6
Manganese (Mn), % 0 to 2.0
1.5 to 4.0
Molybdenum (Mo), % 2.5 to 3.5
0
Nickel (Ni), % 19 to 21
5.5 to 6.9
Niobium (Nb), % 0.75 to 1.3
0
Nitrogen (N), % 0.1 to 0.2
0.030 to 0.11
Phosphorus (P), % 0 to 0.035
0 to 0.045
Silicon (Si), % 0 to 1.0
0 to 0.5
Sulfur (S), % 0 to 0.015
0 to 0.015
Tungsten (W), % 2.0 to 3.0
0