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EN 1.7779 Steel vs. EN 1.7233 Steel

Both EN 1.7779 steel and EN 1.7233 steel are iron alloys. They have a very high 97% of their average alloy composition in common. There are 32 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 1.7233 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 240
210 to 290
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 16
18 to 23
Fatigue Strength, MPa 430
270 to 530
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Shear Strength, MPa 500
450 to 590
Tensile Strength: Ultimate (UTS), MPa 810
700 to 960
Tensile Strength: Yield (Proof), MPa 660
380 to 780

Thermal Properties

Latent Heat of Fusion, J/g 260
250
Maximum Temperature: Mechanical, °C 470
430
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
39
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.7
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 8.9
8.5

Otherwise Unclassified Properties

Base Metal Price, % relative 4.0
3.0
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 2.8
1.6
Embodied Energy, MJ/kg 41
21
Embodied Water, L/kg 64
53

Common Calculations

PREN (Pitting Resistance) 5.0
3.3
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
110 to 200
Resilience: Unit (Modulus of Resilience), kJ/m3 1150
380 to 1630
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 29
25 to 34
Strength to Weight: Bending, points 25
22 to 28
Thermal Diffusivity, mm2/s 11
11
Thermal Shock Resistance, points 23
21 to 28

Alloy Composition

Aluminum (Al), % 0 to 0.040
0
Carbon (C), % 0.17 to 0.23
0.39 to 0.45
Chromium (Cr), % 3.0 to 3.3
1.2 to 1.5
Copper (Cu), % 0 to 0.3
0
Iron (Fe), % 93.8 to 95.4
96.2 to 97.5
Manganese (Mn), % 0.3 to 0.5
0.4 to 0.7
Molybdenum (Mo), % 0.5 to 0.6
0.5 to 0.7
Nickel (Ni), % 0 to 0.3
0
Phosphorus (P), % 0 to 0.025
0 to 0.025
Silicon (Si), % 0.15 to 0.35
0 to 0.4
Sulfur (S), % 0 to 0.010
0 to 0.035
Vanadium (V), % 0.45 to 0.55
0