MakeItFrom.com
Menu (ESC)

EN 1.7779 Steel vs. EN 1.8505 Steel

Both EN 1.7779 steel and EN 1.8505 steel are iron alloys. Both are furnished in the quenched and tempered condition. They have a very high 97% of their average alloy composition in common.

For each property being compared, the top bar is EN 1.7779 steel and the bottom bar is EN 1.8505 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 240
320
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 16
13
Fatigue Strength, MPa 430
540
Impact Strength: V-Notched Charpy, J 38
28
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Shear Strength, MPa 500
630
Tensile Strength: Ultimate (UTS), MPa 810
1050
Tensile Strength: Yield (Proof), MPa 660
860

Thermal Properties

Latent Heat of Fusion, J/g 260
250
Maximum Temperature: Mechanical, °C 470
440
Melting Completion (Liquidus), °C 1460
1450
Melting Onset (Solidus), °C 1420
1410
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 39
39
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.7
7.5
Electrical Conductivity: Equal Weight (Specific), % IACS 8.9
8.7

Otherwise Unclassified Properties

Base Metal Price, % relative 4.0
2.8
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 2.8
1.6
Embodied Energy, MJ/kg 41
22
Embodied Water, L/kg 64
65

Common Calculations

PREN (Pitting Resistance) 5.0
2.6
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
120
Resilience: Unit (Modulus of Resilience), kJ/m3 1150
1950
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 29
37
Strength to Weight: Bending, points 25
30
Thermal Diffusivity, mm2/s 11
11
Thermal Shock Resistance, points 23
31

Alloy Composition

Aluminum (Al), % 0 to 0.040
0.8 to 1.2
Carbon (C), % 0.17 to 0.23
0.28 to 0.35
Chromium (Cr), % 3.0 to 3.3
1.5 to 1.8
Copper (Cu), % 0 to 0.3
0
Iron (Fe), % 93.8 to 95.4
95.4 to 97.1
Manganese (Mn), % 0.3 to 0.5
0.4 to 0.7
Molybdenum (Mo), % 0.5 to 0.6
0.2 to 0.4
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