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EN 1.7779 Steel vs. EN 1.3961 Alloy

Both EN 1.7779 steel and EN 1.3961 alloy are iron alloys. Both are furnished in the quenched and tempered condition. They have 64% of their average alloy composition in common. There are 24 material properties with values for both materials. Properties with values for just one material (9, 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 1.3961 alloy.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 16
31
Poisson's Ratio 0.29
0.3
Shear Modulus, GPa 73
72
Shear Strength, MPa 500
300
Tensile Strength: Ultimate (UTS), MPa 810
450
Tensile Strength: Yield (Proof), MPa 660
310

Thermal Properties

Latent Heat of Fusion, J/g 260
270
Melting Completion (Liquidus), °C 1460
1430
Melting Onset (Solidus), °C 1420
1390
Specific Heat Capacity, J/kg-K 470
460
Thermal Expansion, µm/m-K 13
1.3

Otherwise Unclassified Properties

Base Metal Price, % relative 4.0
25
Density, g/cm3 7.8
8.2
Embodied Carbon, kg CO2/kg material 2.8
4.8
Embodied Energy, MJ/kg 41
66
Embodied Water, L/kg 64
110

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
130
Resilience: Unit (Modulus of Resilience), kJ/m3 1150
250
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
23
Strength to Weight: Axial, points 29
15
Strength to Weight: Bending, points 25
16
Thermal Shock Resistance, points 23
130

Alloy Composition

Aluminum (Al), % 0 to 0.040
0
Carbon (C), % 0.17 to 0.23
0 to 0.050
Chromium (Cr), % 3.0 to 3.3
0 to 0.25
Copper (Cu), % 0 to 0.3
0
Iron (Fe), % 93.8 to 95.4
60.7 to 65
Manganese (Mn), % 0.3 to 0.5
0 to 0.5
Molybdenum (Mo), % 0.5 to 0.6
0 to 1.0
Nickel (Ni), % 0 to 0.3
35 to 37
Phosphorus (P), % 0 to 0.025
0 to 0.030
Silicon (Si), % 0.15 to 0.35
0 to 0.5
Sulfur (S), % 0 to 0.010
0 to 0.020
Vanadium (V), % 0.45 to 0.55
0