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EN 1.4971 Stainless Steel vs. EN 1.4122 Stainless Steel

Both EN 1.4971 stainless steel and EN 1.4122 stainless steel are iron alloys. They have 50% of their average alloy composition in common. There are 30 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 1.4122 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
200
Elongation at Break, % 34
14
Fatigue Strength, MPa 270
260 to 360
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 81
77
Shear Strength, MPa 530
480 to 520
Tensile Strength: Ultimate (UTS), MPa 800
790 to 850
Tensile Strength: Yield (Proof), MPa 340
450 to 630

Thermal Properties

Latent Heat of Fusion, J/g 300
280
Maximum Temperature: Corrosion, °C 570
400
Maximum Temperature: Mechanical, °C 1100
870
Melting Completion (Liquidus), °C 1460
1440
Melting Onset (Solidus), °C 1410
1400
Specific Heat Capacity, J/kg-K 450
480
Thermal Conductivity, W/m-K 13
15
Thermal Expansion, µm/m-K 15
10

Otherwise Unclassified Properties

Base Metal Price, % relative 70
9.5
Density, g/cm3 8.4
7.7
Embodied Carbon, kg CO2/kg material 7.6
2.4
Embodied Energy, MJ/kg 110
33
Embodied Water, L/kg 300
120

Common Calculations

PREN (Pitting Resistance) 38
20
Resilience: Ultimate (Unit Rupture Work), MJ/m3 220
93 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 280
520 to 1000
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 26
28 to 31
Strength to Weight: Bending, points 23
25 to 26
Thermal Diffusivity, mm2/s 3.4
4.0
Thermal Shock Resistance, points 19
28 to 30

Alloy Composition

Carbon (C), % 0.080 to 0.16
0.33 to 0.45
Chromium (Cr), % 20 to 22.5
15.5 to 17.5
Cobalt (Co), % 18.5 to 21
0
Iron (Fe), % 24.3 to 37.1
77.2 to 83.4
Manganese (Mn), % 0 to 2.0
0 to 1.5
Molybdenum (Mo), % 2.5 to 3.5
0.8 to 1.3
Nickel (Ni), % 19 to 21
0 to 1.0
Niobium (Nb), % 0.75 to 1.3
0
Nitrogen (N), % 0.1 to 0.2
0
Phosphorus (P), % 0 to 0.035
0 to 0.040
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