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EN 1.7379 Steel vs. EN 1.4317 Stainless Steel

Both EN 1.7379 steel and EN 1.4317 stainless steel are iron alloys. Both are furnished in the quenched and tempered condition. They have 85% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is EN 1.7379 steel and the bottom bar is EN 1.4317 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 21
17
Fatigue Strength, MPa 320
380
Impact Strength: V-Notched Charpy, J 45
56
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 74
76
Tensile Strength: Ultimate (UTS), MPa 670
860
Tensile Strength: Yield (Proof), MPa 460
630

Thermal Properties

Latent Heat of Fusion, J/g 260
280
Maximum Temperature: Mechanical, °C 460
770
Melting Completion (Liquidus), °C 1470
1440
Melting Onset (Solidus), °C 1420
1400
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 39
26
Thermal Expansion, µm/m-K 13
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.6
2.7
Electrical Conductivity: Equal Weight (Specific), % IACS 8.8
3.2

Otherwise Unclassified Properties

Base Metal Price, % relative 3.8
10
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.8
2.4
Embodied Energy, MJ/kg 23
33
Embodied Water, L/kg 59
110

Common Calculations

PREN (Pitting Resistance) 5.7
14
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
130
Resilience: Unit (Modulus of Resilience), kJ/m3 550
1010
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 24
31
Strength to Weight: Bending, points 22
26
Thermal Diffusivity, mm2/s 11
7.0
Thermal Shock Resistance, points 19
30

Alloy Composition

Carbon (C), % 0.13 to 0.2
0 to 0.060
Chromium (Cr), % 2.0 to 2.5
12 to 13.5
Iron (Fe), % 94.5 to 96.5
78.7 to 84.5
Manganese (Mn), % 0.5 to 0.9
0 to 1.0
Molybdenum (Mo), % 0.9 to 1.2
0 to 0.7
Nickel (Ni), % 0
3.5 to 5.0
Phosphorus (P), % 0 to 0.025
0 to 0.035
Silicon (Si), % 0 to 0.6
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.025