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EN 1.8527 Steel vs. EN 1.7706 Steel

Both EN 1.8527 steel and EN 1.7706 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. 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 1.8527 steel and the bottom bar is EN 1.7706 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 270
210
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 16
17
Fatigue Strength, MPa 520
330
Impact Strength: V-Notched Charpy, J 39
30
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 74
73
Tensile Strength: Ultimate (UTS), MPa 900
690
Tensile Strength: Yield (Proof), MPa 800
500

Thermal Properties

Latent Heat of Fusion, J/g 260
260
Maximum Temperature: Mechanical, °C 490
440
Melting Completion (Liquidus), °C 1460
1470
Melting Onset (Solidus), °C 1420
1430
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 41
40
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.8
7.6
Electrical Conductivity: Equal Weight (Specific), % IACS 9.0
8.7

Otherwise Unclassified Properties

Base Metal Price, % relative 4.0
3.7
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 1.7
2.3
Embodied Energy, MJ/kg 23
32
Embodied Water, L/kg 66
57

Common Calculations

PREN (Pitting Resistance) 5.7
4.7
Resilience: Ultimate (Unit Rupture Work), MJ/m3 140
110
Resilience: Unit (Modulus of Resilience), kJ/m3 1670
670
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 32
24
Strength to Weight: Bending, points 26
22
Thermal Diffusivity, mm2/s 11
11
Thermal Shock Resistance, points 26
20

Alloy Composition

Carbon (C), % 0.040 to 0.12
0.15 to 0.2
Chromium (Cr), % 3.7 to 4.3
1.2 to 1.5
Copper (Cu), % 0 to 0.25
0 to 0.3
Iron (Fe), % 93.2 to 95.1
94.7 to 97.1
Manganese (Mn), % 0.85 to 1.2
0.5 to 0.9
Molybdenum (Mo), % 0.4 to 0.6
0.9 to 1.1
Nickel (Ni), % 0
0 to 0.4
Phosphorus (P), % 0 to 0.025
0 to 0.020
Silicon (Si), % 0 to 0.4
0 to 0.6
Sulfur (S), % 0 to 0.035
0 to 0.015
Vanadium (V), % 0
0.2 to 0.3