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EN 1.7390 Steel vs. EN 1.4655 Stainless Steel

Both EN 1.7390 steel and EN 1.4655 stainless steel are iron alloys. They have 75% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is EN 1.7390 steel and the bottom bar is EN 1.4655 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 16
23 to 25
Fatigue Strength, MPa 310
320
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 74
78
Shear Strength, MPa 440
460
Tensile Strength: Ultimate (UTS), MPa 710
720 to 730
Tensile Strength: Yield (Proof), MPa 480
450 to 480

Thermal Properties

Latent Heat of Fusion, J/g 260
290
Maximum Temperature: Mechanical, °C 510
1050
Melting Completion (Liquidus), °C 1460
1420
Melting Onset (Solidus), °C 1420
1370
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 40
15
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.1
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 9.3
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 4.3
15
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 1.7
2.9
Embodied Energy, MJ/kg 23
41
Embodied Water, L/kg 69
160

Common Calculations

PREN (Pitting Resistance) 6.8
26
Resilience: Ultimate (Unit Rupture Work), MJ/m3 100
150 to 160
Resilience: Unit (Modulus of Resilience), kJ/m3 600
510 to 580
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 25
26
Strength to Weight: Bending, points 23
23
Thermal Diffusivity, mm2/s 11
4.0
Thermal Shock Resistance, points 20
20

Alloy Composition

Carbon (C), % 0 to 0.18
0 to 0.030
Chromium (Cr), % 4.0 to 6.0
22 to 24
Copper (Cu), % 0
1.0 to 3.0
Iron (Fe), % 91.9 to 95.3
63.6 to 73.4
Manganese (Mn), % 0.3 to 0.8
0 to 2.0
Molybdenum (Mo), % 0.45 to 0.65
0.1 to 0.6
Nickel (Ni), % 0
3.5 to 5.5
Nitrogen (N), % 0
0.050 to 0.2
Phosphorus (P), % 0 to 0.025
0 to 0.035
Silicon (Si), % 0 to 0.4
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.015