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EN 1.7707 Steel vs. EN 1.8958 Steel

Both EN 1.7707 steel and EN 1.8958 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 1.7707 steel and the bottom bar is EN 1.8958 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 300
130
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 11
19
Fatigue Strength, MPa 500
150
Impact Strength: V-Notched Charpy, J 31
30
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Shear Strength, MPa 600
270
Tensile Strength: Ultimate (UTS), MPa 1010
430
Tensile Strength: Yield (Proof), MPa 800
220

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 460
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
46
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 3.3
2.4
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 1.9
1.5
Embodied Energy, MJ/kg 27
19
Embodied Water, L/kg 58
50

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
70
Resilience: Unit (Modulus of Resilience), kJ/m3 1690
130
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 36
15
Strength to Weight: Bending, points 29
16
Thermal Diffusivity, mm2/s 11
12
Thermal Shock Resistance, points 29
13

Alloy Composition

Carbon (C), % 0.26 to 0.34
0 to 0.16
Chromium (Cr), % 2.3 to 2.7
0.35 to 0.85
Copper (Cu), % 0
0.2 to 0.6
Iron (Fe), % 94.7 to 96.8
96.5 to 99.3
Manganese (Mn), % 0.4 to 0.7
0.15 to 0.7
Molybdenum (Mo), % 0.15 to 0.25
0
Nickel (Ni), % 0 to 0.6
0 to 0.7
Nitrogen (N), % 0
0 to 0.010
Phosphorus (P), % 0 to 0.035
0 to 0.040
Silicon (Si), % 0 to 0.4
0 to 0.45
Sulfur (S), % 0 to 0.035
0 to 0.040
Vanadium (V), % 0.1 to 0.2
0