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EN 1.4434 Stainless Steel vs. EN 1.4557 Stainless Steel

Both EN 1.4434 stainless steel and EN 1.4557 stainless steel are iron alloys. Both are furnished in the solution annealed (AT) condition. They have 88% of their average alloy composition in common. There are 33 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is EN 1.4434 stainless steel and the bottom bar is EN 1.4557 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200
160
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 41
40
Fatigue Strength, MPa 270
260
Impact Strength: V-Notched Charpy, J 90
56
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 79
80
Tensile Strength: Ultimate (UTS), MPa 660
560
Tensile Strength: Yield (Proof), MPa 310
300

Thermal Properties

Latent Heat of Fusion, J/g 290
300
Maximum Temperature: Corrosion, °C 420
420
Maximum Temperature: Mechanical, °C 980
1090
Melting Completion (Liquidus), °C 1450
1460
Melting Onset (Solidus), °C 1400
1420
Specific Heat Capacity, J/kg-K 470
460
Thermal Conductivity, W/m-K 15
15
Thermal Expansion, µm/m-K 16
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.3
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.6
2.2

Otherwise Unclassified Properties

Base Metal Price, % relative 21
29
Density, g/cm3 7.9
8.0
Embodied Carbon, kg CO2/kg material 4.2
5.6
Embodied Energy, MJ/kg 57
76
Embodied Water, L/kg 160
190

Common Calculations

PREN (Pitting Resistance) 32
45
Resilience: Ultimate (Unit Rupture Work), MJ/m3 220
190
Resilience: Unit (Modulus of Resilience), kJ/m3 240
210
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 23
19
Strength to Weight: Bending, points 21
19
Thermal Diffusivity, mm2/s 4.0
4.0
Thermal Shock Resistance, points 15
12

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.020
Chromium (Cr), % 16.5 to 19.5
19.5 to 20.5
Copper (Cu), % 0
0.5 to 1.0
Iron (Fe), % 59.2 to 69.9
49.5 to 56.3
Manganese (Mn), % 0 to 2.0
0 to 1.2
Molybdenum (Mo), % 3.0 to 4.0
6.0 to 7.0
Nickel (Ni), % 10.5 to 14
17.5 to 19.5
Nitrogen (N), % 0.1 to 0.2
0.18 to 0.24
Phosphorus (P), % 0 to 0.045
0 to 0.030
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.010