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EN 1.4374 Stainless Steel vs. EN 1.4615 Stainless Steel

Both EN 1.4374 stainless steel and EN 1.4615 stainless steel are iron alloys. Both are furnished in the solution annealed (AT) condition. They have a moderately high 95% of their average alloy composition in common.

For each property being compared, the top bar is EN 1.4374 stainless steel and the bottom bar is EN 1.4615 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 230
150
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 40
50
Fatigue Strength, MPa 340
190
Impact Strength: V-Notched Charpy, J 90
91
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
76
Shear Strength, MPa 550
360
Tensile Strength: Ultimate (UTS), MPa 800
500
Tensile Strength: Yield (Proof), MPa 400
200

Thermal Properties

Latent Heat of Fusion, J/g 290
280
Maximum Temperature: Corrosion, °C 410
400
Maximum Temperature: Mechanical, °C 920
840
Melting Completion (Liquidus), °C 1400
1400
Melting Onset (Solidus), °C 1360
1360
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 15
15
Thermal Expansion, µm/m-K 17
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.9
2.8

Otherwise Unclassified Properties

Base Metal Price, % relative 14
13
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.9
2.8
Embodied Energy, MJ/kg 42
40
Embodied Water, L/kg 150
140

Common Calculations

PREN (Pitting Resistance) 23
17
Resilience: Ultimate (Unit Rupture Work), MJ/m3 270
200
Resilience: Unit (Modulus of Resilience), kJ/m3 400
99
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
4.1
Thermal Shock Resistance, points 17
11

Alloy Composition

Carbon (C), % 0.050 to 0.1
0 to 0.030
Chromium (Cr), % 17.5 to 18.5
14 to 16
Copper (Cu), % 0 to 0.4
2.0 to 4.0
Iron (Fe), % 63.5 to 67.9
63.1 to 72.5
Manganese (Mn), % 9.0 to 10
7.0 to 9.0
Molybdenum (Mo), % 0 to 0.5
0 to 0.8
Nickel (Ni), % 5.0 to 6.0
4.5 to 6.0
Nitrogen (N), % 0.25 to 0.32
0.020 to 0.060
Phosphorus (P), % 0 to 0.035
0 to 0.040
Silicon (Si), % 0.3 to 0.6
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.010