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EN 1.7725 Steel vs. SAE-AISI 8615 Steel

Both EN 1.7725 steel and SAE-AISI 8615 steel are iron alloys. They have a very high 99% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is EN 1.7725 steel and the bottom bar is SAE-AISI 8615 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 250 to 300
150
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 14
25
Fatigue Strength, MPa 390 to 550
220
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Tensile Strength: Ultimate (UTS), MPa 830 to 1000
480
Tensile Strength: Yield (Proof), MPa 610 to 860
310

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 440
410
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 7.4
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 8.6
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 2.9
2.6
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.8
1.5
Embodied Energy, MJ/kg 24
20
Embodied Water, L/kg 54
50

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110 to 130
110
Resilience: Unit (Modulus of Resilience), kJ/m3 980 to 1940
250
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 29 to 35
17
Strength to Weight: Bending, points 25 to 28
17
Thermal Diffusivity, mm2/s 11
10
Thermal Shock Resistance, points 24 to 29
14

Alloy Composition

Carbon (C), % 0.27 to 0.34
0.13 to 0.18
Chromium (Cr), % 1.3 to 1.7
0.4 to 0.6
Iron (Fe), % 95.7 to 97.5
96.9 to 98.1
Manganese (Mn), % 0.6 to 1.0
0.7 to 0.9
Molybdenum (Mo), % 0.3 to 0.5
0.15 to 0.25
Nickel (Ni), % 0
0.4 to 0.7
Phosphorus (P), % 0 to 0.025
0 to 0.035
Silicon (Si), % 0 to 0.6
0.15 to 0.35
Sulfur (S), % 0 to 0.030
0 to 0.040
Vanadium (V), % 0.050 to 0.15
0