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EN 1.4640 Stainless Steel vs. EN 1.4376 Stainless Steel

Both EN 1.4640 stainless steel and EN 1.4376 stainless steel are iron alloys. They have a very high 95% of their average alloy composition in common.

For each property being compared, the top bar is EN 1.4640 stainless steel and the bottom bar is EN 1.4376 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190 to 200
230
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 51
45
Fatigue Strength, MPa 230 to 250
420
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
77
Shear Strength, MPa 440 to 460
530
Tensile Strength: Ultimate (UTS), MPa 620 to 650
750
Tensile Strength: Yield (Proof), MPa 240 to 260
450

Thermal Properties

Latent Heat of Fusion, J/g 280
290
Maximum Temperature: Corrosion, °C 420
420
Maximum Temperature: Mechanical, °C 930
930
Melting Completion (Liquidus), °C 1420
1410
Melting Onset (Solidus), °C 1380
1370
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 15
15
Thermal Expansion, µm/m-K 16
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
2.8

Otherwise Unclassified Properties

Base Metal Price, % relative 14
12
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 2.8
2.6
Embodied Energy, MJ/kg 40
37
Embodied Water, L/kg 150
140

Common Calculations

PREN (Pitting Resistance) 20
21
Resilience: Ultimate (Unit Rupture Work), MJ/m3 250 to 260
290
Resilience: Unit (Modulus of Resilience), kJ/m3 150 to 170
520
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 22 to 23
27
Strength to Weight: Bending, points 21
24
Thermal Diffusivity, mm2/s 4.0
4.0
Thermal Shock Resistance, points 14 to 15
17

Alloy Composition

Carbon (C), % 0.030 to 0.080
0 to 0.1
Chromium (Cr), % 18 to 19
17 to 20.5
Copper (Cu), % 1.3 to 2.0
0
Iron (Fe), % 67.4 to 73.6
65.5 to 76
Manganese (Mn), % 1.5 to 4.0
5.0 to 8.0
Nickel (Ni), % 5.5 to 6.9
2.0 to 4.5
Nitrogen (N), % 0.030 to 0.11
0 to 0.3
Phosphorus (P), % 0 to 0.045
0 to 0.045
Silicon (Si), % 0 to 0.5
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.015