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EN 1.4971 Stainless Steel vs. EN 1.4429 Stainless Steel

Both EN 1.4971 stainless steel and EN 1.4429 stainless steel are iron alloys. Both are furnished in the solution annealed (AT) condition. They have 65% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (3, 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 1.4429 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 240
220
Elastic (Young's, Tensile) Modulus, GPa 210
200
Elongation at Break, % 34
40
Fatigue Strength, MPa 270
280
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 81
78
Shear Strength, MPa 530
470
Tensile Strength: Ultimate (UTS), MPa 800
690
Tensile Strength: Yield (Proof), MPa 340
320

Thermal Properties

Latent Heat of Fusion, J/g 300
290
Maximum Temperature: Corrosion, °C 570
410
Maximum Temperature: Mechanical, °C 1100
960
Melting Completion (Liquidus), °C 1460
1440
Melting Onset (Solidus), °C 1410
1400
Specific Heat Capacity, J/kg-K 450
470
Thermal Conductivity, W/m-K 13
15
Thermal Expansion, µm/m-K 15
16

Otherwise Unclassified Properties

Base Metal Price, % relative 70
20
Density, g/cm3 8.4
7.9
Embodied Carbon, kg CO2/kg material 7.6
4.0
Embodied Energy, MJ/kg 110
55
Embodied Water, L/kg 300
150

Common Calculations

PREN (Pitting Resistance) 38
29
Resilience: Ultimate (Unit Rupture Work), MJ/m3 220
230
Resilience: Unit (Modulus of Resilience), kJ/m3 280
250
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 26
24
Strength to Weight: Bending, points 23
22
Thermal Diffusivity, mm2/s 3.4
4.0
Thermal Shock Resistance, points 19
15

Alloy Composition

Carbon (C), % 0.080 to 0.16
0 to 0.030
Chromium (Cr), % 20 to 22.5
16.5 to 18.5
Cobalt (Co), % 18.5 to 21
0
Iron (Fe), % 24.3 to 37.1
61.2 to 69.9
Manganese (Mn), % 0 to 2.0
0 to 2.0
Molybdenum (Mo), % 2.5 to 3.5
2.5 to 3.0
Nickel (Ni), % 19 to 21
11 to 14
Niobium (Nb), % 0.75 to 1.3
0
Nitrogen (N), % 0.1 to 0.2
0.12 to 0.22
Phosphorus (P), % 0 to 0.035
0 to 0.045
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.015
Tungsten (W), % 2.0 to 3.0
0