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EN 1.7706 Steel vs. EN 1.7715 Steel

Both EN 1.7706 steel and EN 1.7715 steel are iron alloys. They have a very high 98% 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 1.7706 steel and the bottom bar is EN 1.7715 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210
160
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 17
21
Fatigue Strength, MPa 330
240
Impact Strength: V-Notched Charpy, J 30
34
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Tensile Strength: Ultimate (UTS), MPa 690
540
Tensile Strength: Yield (Proof), MPa 500
340

Thermal Properties

Latent Heat of Fusion, J/g 260
250
Maximum Temperature: Mechanical, °C 440
420
Melting Completion (Liquidus), °C 1470
1470
Melting Onset (Solidus), °C 1430
1430
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 40
40
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.6
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 8.7
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 3.7
2.9
Density, g/cm3 7.9
7.9
Embodied Carbon, kg CO2/kg material 2.3
2.2
Embodied Energy, MJ/kg 32
30
Embodied Water, L/kg 57
52

Common Calculations

PREN (Pitting Resistance) 4.7
2.4
Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
99
Resilience: Unit (Modulus of Resilience), kJ/m3 670
320
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 24
19
Strength to Weight: Bending, points 22
19
Thermal Diffusivity, mm2/s 11
11
Thermal Shock Resistance, points 20
16

Alloy Composition

Aluminum (Al), % 0
0 to 0.040
Carbon (C), % 0.15 to 0.2
0.1 to 0.15
Chromium (Cr), % 1.2 to 1.5
0.3 to 0.6
Copper (Cu), % 0 to 0.3
0 to 0.3
Iron (Fe), % 94.7 to 97.1
96.5 to 98.3
Manganese (Mn), % 0.5 to 0.9
0.4 to 0.7
Molybdenum (Mo), % 0.9 to 1.1
0.5 to 0.7
Nickel (Ni), % 0 to 0.4
0 to 0.3
Phosphorus (P), % 0 to 0.020
0 to 0.025
Silicon (Si), % 0 to 0.6
0.15 to 0.35
Sulfur (S), % 0 to 0.015
0 to 0.010
Vanadium (V), % 0.2 to 0.3
0.22 to 0.28