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EN 1.7779 Steel vs. EN 1.4986 Stainless Steel

Both EN 1.7779 steel and EN 1.4986 stainless steel are iron alloys. They have 68% of their average alloy composition in common. There are 33 material properties with values for both materials. Properties with values for just one material (1, 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 1.4986 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 240
230
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 16
18
Fatigue Strength, MPa 430
350
Impact Strength: V-Notched Charpy, J 38
57
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
77
Shear Strength, MPa 500
460
Tensile Strength: Ultimate (UTS), MPa 810
750
Tensile Strength: Yield (Proof), MPa 660
560

Thermal Properties

Latent Heat of Fusion, J/g 260
290
Maximum Temperature: Mechanical, °C 470
940
Melting Completion (Liquidus), °C 1460
1450
Melting Onset (Solidus), °C 1420
1400
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 39
15
Thermal Expansion, µm/m-K 13
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.7
2.3
Electrical Conductivity: Equal Weight (Specific), % IACS 8.9
2.6

Otherwise Unclassified Properties

Base Metal Price, % relative 4.0
25
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 2.8
4.8
Embodied Energy, MJ/kg 41
67
Embodied Water, L/kg 64
150

Common Calculations

PREN (Pitting Resistance) 5.0
22
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
120
Resilience: Unit (Modulus of Resilience), kJ/m3 1150
790
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 29
26
Strength to Weight: Bending, points 25
23
Thermal Diffusivity, mm2/s 11
4.0
Thermal Shock Resistance, points 23
16

Alloy Composition

Aluminum (Al), % 0 to 0.040
0
Boron (B), % 0
0.050 to 0.1
Carbon (C), % 0.17 to 0.23
0.040 to 0.1
Chromium (Cr), % 3.0 to 3.3
15.5 to 17.5
Copper (Cu), % 0 to 0.3
0
Iron (Fe), % 93.8 to 95.4
59.4 to 66.6
Manganese (Mn), % 0.3 to 0.5
0 to 1.5
Molybdenum (Mo), % 0.5 to 0.6
1.6 to 2.0
Nickel (Ni), % 0 to 0.3
15.5 to 17.5
Niobium (Nb), % 0
0.4 to 1.2
Phosphorus (P), % 0 to 0.025
0 to 0.045
Silicon (Si), % 0.15 to 0.35
0.3 to 0.6
Sulfur (S), % 0 to 0.010
0 to 0.030
Vanadium (V), % 0.45 to 0.55
0