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EN 1.7779 Steel vs. EN 1.4415 Stainless Steel

Both EN 1.7779 steel and EN 1.4415 stainless steel are iron alloys. They have 84% of their average alloy composition in common. There are 32 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 1.7779 steel and the bottom bar is EN 1.4415 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 16
17 to 20
Fatigue Strength, MPa 430
470 to 510
Impact Strength: V-Notched Charpy, J 38
91 to 110
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
77
Shear Strength, MPa 500
520 to 570
Tensile Strength: Ultimate (UTS), MPa 810
830 to 930
Tensile Strength: Yield (Proof), MPa 660
730 to 840

Thermal Properties

Latent Heat of Fusion, J/g 260
280
Maximum Temperature: Mechanical, °C 470
790
Melting Completion (Liquidus), °C 1460
1460
Melting Onset (Solidus), °C 1420
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 39
19
Thermal Expansion, µm/m-K 13
9.9

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.7
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 8.9
2.8

Otherwise Unclassified Properties

Base Metal Price, % relative 4.0
13
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 2.8
3.6
Embodied Energy, MJ/kg 41
51
Embodied Water, L/kg 64
120

Common Calculations

PREN (Pitting Resistance) 5.0
19
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
150 to 160
Resilience: Unit (Modulus of Resilience), kJ/m3 1150
1350 to 1790
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 29
29 to 33
Strength to Weight: Bending, points 25
25 to 27
Thermal Diffusivity, mm2/s 11
5.1
Thermal Shock Resistance, points 23
30 to 34

Alloy Composition

Aluminum (Al), % 0 to 0.040
0
Carbon (C), % 0.17 to 0.23
0 to 0.030
Chromium (Cr), % 3.0 to 3.3
11.5 to 13.5
Copper (Cu), % 0 to 0.3
0
Iron (Fe), % 93.8 to 95.4
75.9 to 82.4
Manganese (Mn), % 0.3 to 0.5
0 to 0.5
Molybdenum (Mo), % 0.5 to 0.6
1.5 to 2.5
Nickel (Ni), % 0 to 0.3
4.5 to 6.5
Phosphorus (P), % 0 to 0.025
0 to 0.040
Silicon (Si), % 0.15 to 0.35
0 to 0.5
Sulfur (S), % 0 to 0.010
0 to 0.015
Titanium (Ti), % 0
0 to 0.010
Vanadium (V), % 0.45 to 0.55
0.1 to 0.5