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EN 1.4557 Stainless Steel vs. EN 1.4412 Stainless Steel

Both EN 1.4557 stainless steel and EN 1.4412 stainless steel are iron alloys. Both are furnished in the solution annealed (AT) condition. They have 88% of their average alloy composition in common.

For each property being compared, the top bar is EN 1.4557 stainless steel and the bottom bar is EN 1.4412 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160
140
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 40
34
Fatigue Strength, MPa 260
190
Impact Strength: V-Notched Charpy, J 56
67
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 80
79
Tensile Strength: Ultimate (UTS), MPa 560
490
Tensile Strength: Yield (Proof), MPa 300
230

Thermal Properties

Latent Heat of Fusion, J/g 300
300
Maximum Temperature: Corrosion, °C 420
420
Maximum Temperature: Mechanical, °C 1090
1000
Melting Completion (Liquidus), °C 1460
1450
Melting Onset (Solidus), °C 1420
1400
Specific Heat Capacity, J/kg-K 460
470
Thermal Conductivity, W/m-K 15
15
Thermal Expansion, µm/m-K 17
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
2.1
Electrical Conductivity: Equal Weight (Specific), % IACS 2.2
2.4

Otherwise Unclassified Properties

Base Metal Price, % relative 29
20
Density, g/cm3 8.0
7.9
Embodied Carbon, kg CO2/kg material 5.6
4.1
Embodied Energy, MJ/kg 76
56
Embodied Water, L/kg 190
160

Common Calculations

PREN (Pitting Resistance) 45
30
Resilience: Ultimate (Unit Rupture Work), MJ/m3 190
140
Resilience: Unit (Modulus of Resilience), kJ/m3 210
140
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 19
17
Strength to Weight: Bending, points 19
18
Thermal Diffusivity, mm2/s 4.0
3.9
Thermal Shock Resistance, points 12
11

Alloy Composition

Carbon (C), % 0 to 0.020
0 to 0.070
Chromium (Cr), % 19.5 to 20.5
18 to 20
Copper (Cu), % 0.5 to 1.0
0
Iron (Fe), % 49.5 to 56.3
60.4 to 69
Manganese (Mn), % 0 to 1.2
0 to 1.5
Molybdenum (Mo), % 6.0 to 7.0
3.0 to 3.5
Nickel (Ni), % 17.5 to 19.5
10 to 13
Nitrogen (N), % 0.18 to 0.24
0
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.5
Sulfur (S), % 0 to 0.010
0 to 0.030