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EN 1.4640 Stainless Steel vs. EN 1.7390 Steel

Both EN 1.4640 stainless steel and EN 1.7390 steel are iron alloys. They have 76% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is EN 1.4640 stainless steel and the bottom bar is EN 1.7390 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190 to 200
210
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 51
16
Fatigue Strength, MPa 230 to 250
310
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
74
Shear Strength, MPa 440 to 460
440
Tensile Strength: Ultimate (UTS), MPa 620 to 650
710
Tensile Strength: Yield (Proof), MPa 240 to 260
480

Thermal Properties

Latent Heat of Fusion, J/g 280
260
Maximum Temperature: Mechanical, °C 930
510
Melting Completion (Liquidus), °C 1420
1460
Melting Onset (Solidus), °C 1380
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 15
40
Thermal Expansion, µm/m-K 16
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
8.1
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
9.3

Otherwise Unclassified Properties

Base Metal Price, % relative 14
4.3
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 2.8
1.7
Embodied Energy, MJ/kg 40
23
Embodied Water, L/kg 150
69

Common Calculations

PREN (Pitting Resistance) 20
6.8
Resilience: Ultimate (Unit Rupture Work), MJ/m3 250 to 260
100
Resilience: Unit (Modulus of Resilience), kJ/m3 150 to 170
600
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 22 to 23
25
Strength to Weight: Bending, points 21
23
Thermal Diffusivity, mm2/s 4.0
11
Thermal Shock Resistance, points 14 to 15
20

Alloy Composition

Carbon (C), % 0.030 to 0.080
0 to 0.18
Chromium (Cr), % 18 to 19
4.0 to 6.0
Copper (Cu), % 1.3 to 2.0
0
Iron (Fe), % 67.4 to 73.6
91.9 to 95.3
Manganese (Mn), % 1.5 to 4.0
0.3 to 0.8
Molybdenum (Mo), % 0
0.45 to 0.65
Nickel (Ni), % 5.5 to 6.9
0
Nitrogen (N), % 0.030 to 0.11
0
Phosphorus (P), % 0 to 0.045
0 to 0.025
Silicon (Si), % 0 to 0.5
0 to 0.4
Sulfur (S), % 0 to 0.015
0 to 0.015