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EN 1.4374 Stainless Steel vs. EN 1.4581 Stainless Steel

Both EN 1.4374 stainless steel and EN 1.4581 stainless steel are iron alloys. Both are furnished in the solution annealed (AT) condition. They have a moderately high 91% 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 1.4374 stainless steel and the bottom bar is EN 1.4581 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 230
150
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 40
28
Fatigue Strength, MPa 340
150
Impact Strength: V-Notched Charpy, J 90
45
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
78
Tensile Strength: Ultimate (UTS), MPa 800
510
Tensile Strength: Yield (Proof), MPa 400
210

Thermal Properties

Latent Heat of Fusion, J/g 290
300
Maximum Temperature: Corrosion, °C 410
490
Maximum Temperature: Mechanical, °C 920
990
Melting Completion (Liquidus), °C 1400
1440
Melting Onset (Solidus), °C 1360
1400
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 15
15
Thermal Expansion, µm/m-K 17
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.9
2.3

Otherwise Unclassified Properties

Base Metal Price, % relative 14
21
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.9
4.2
Embodied Energy, MJ/kg 42
59
Embodied Water, L/kg 150
160

Common Calculations

PREN (Pitting Resistance) 23
26
Resilience: Ultimate (Unit Rupture Work), MJ/m3 270
120
Resilience: Unit (Modulus of Resilience), kJ/m3 400
110
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 29
18
Strength to Weight: Bending, points 25
18
Thermal Diffusivity, mm2/s 4.0
3.9
Thermal Shock Resistance, points 17
12

Alloy Composition

Carbon (C), % 0.050 to 0.1
0 to 0.070
Chromium (Cr), % 17.5 to 18.5
18 to 20
Copper (Cu), % 0 to 0.4
0
Iron (Fe), % 63.5 to 67.9
61.4 to 71
Manganese (Mn), % 9.0 to 10
0 to 1.5
Molybdenum (Mo), % 0 to 0.5
2.0 to 2.5
Nickel (Ni), % 5.0 to 6.0
9.0 to 12
Niobium (Nb), % 0
0 to 1.0
Nitrogen (N), % 0.25 to 0.32
0
Phosphorus (P), % 0 to 0.035
0 to 0.040
Silicon (Si), % 0.3 to 0.6
0 to 1.5
Sulfur (S), % 0 to 0.030
0 to 0.030