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EN 1.4374 Stainless Steel vs. EN 1.4740 Stainless Steel

Both EN 1.4374 stainless steel and EN 1.4740 stainless steel are iron alloys. They have 85% of their average alloy composition in common. There are 24 material properties with values for both materials. Properties with values for just one material (10, 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 1.4740 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 230
260
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 40
22
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
77

Thermal Properties

Latent Heat of Fusion, J/g 290
300
Maximum Temperature: Corrosion, °C 410
410
Maximum Temperature: Mechanical, °C 920
900
Melting Completion (Liquidus), °C 1400
1420
Melting Onset (Solidus), °C 1360
1370
Specific Heat Capacity, J/kg-K 480
490
Thermal Conductivity, W/m-K 15
18
Thermal Expansion, µm/m-K 17
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.9
2.6

Otherwise Unclassified Properties

Base Metal Price, % relative 14
9.5
Density, g/cm3 7.7
7.6
Embodied Carbon, kg CO2/kg material 2.9
2.3
Embodied Energy, MJ/kg 42
32
Embodied Water, L/kg 150
120

Common Calculations

PREN (Pitting Resistance) 23
18
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Thermal Diffusivity, mm2/s 4.0
4.8

Alloy Composition

Carbon (C), % 0.050 to 0.1
0.3 to 0.5
Chromium (Cr), % 17.5 to 18.5
16 to 19
Copper (Cu), % 0 to 0.4
0
Iron (Fe), % 63.5 to 67.9
75.4 to 82.7
Manganese (Mn), % 9.0 to 10
0 to 1.0
Molybdenum (Mo), % 0 to 0.5
0 to 0.5
Nickel (Ni), % 5.0 to 6.0
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
1.0 to 2.5
Sulfur (S), % 0 to 0.030
0 to 0.030