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EN 1.4655 Stainless Steel vs. EN 1.7390 Steel

Both EN 1.4655 stainless steel and EN 1.7390 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 1.4655 stainless steel and the bottom bar is EN 1.7390 steel.

Metric UnitsUS Customary Units

Mechanical Properties

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

Thermal Properties

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

Electrical Properties

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

Otherwise Unclassified Properties

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

Common Calculations

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

Alloy Composition

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