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EN 1.7703 Steel vs. EN 1.6957 Steel

Both EN 1.7703 steel and EN 1.6957 steel are iron alloys. They have a very high 96% of their average alloy composition in common. There are 33 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 1.7703 steel and the bottom bar is EN 1.6957 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200 to 210
280
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 20
18
Fatigue Strength, MPa 320 to 340
530
Impact Strength: V-Notched Charpy, J 46
71
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 74
73
Shear Strength, MPa 420 to 430
570
Tensile Strength: Ultimate (UTS), MPa 670 to 690
930
Tensile Strength: Yield (Proof), MPa 460 to 500
780

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 460
450
Melting Completion (Liquidus), °C 1470
1460
Melting Onset (Solidus), °C 1430
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 39
47
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.6
7.9
Electrical Conductivity: Equal Weight (Specific), % IACS 8.7
9.1

Otherwise Unclassified Properties

Base Metal Price, % relative 4.2
5.0
Density, g/cm3 7.9
7.9
Embodied Carbon, kg CO2/kg material 2.5
2.1
Embodied Energy, MJ/kg 35
29
Embodied Water, L/kg 61
60

Common Calculations

PREN (Pitting Resistance) 5.6
2.7
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120 to 130
160
Resilience: Unit (Modulus of Resilience), kJ/m3 570 to 650
1630
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 24
33
Strength to Weight: Bending, points 22
27
Thermal Diffusivity, mm2/s 11
13
Thermal Shock Resistance, points 19 to 20
27

Alloy Composition

Carbon (C), % 0.11 to 0.15
0.22 to 0.32
Chromium (Cr), % 2.0 to 2.5
1.2 to 1.8
Copper (Cu), % 0 to 0.2
0
Iron (Fe), % 94.6 to 96.4
92.7 to 94.7
Manganese (Mn), % 0.3 to 0.6
0.15 to 0.4
Molybdenum (Mo), % 0.9 to 1.1
0.25 to 0.45
Nickel (Ni), % 0 to 0.25
3.4 to 4.0
Niobium (Nb), % 0 to 0.070
0
Nitrogen (N), % 0 to 0.012
0
Phosphorus (P), % 0 to 0.015
0 to 0.010
Silicon (Si), % 0 to 0.1
0 to 0.15
Sulfur (S), % 0 to 0.0050
0 to 0.0070
Titanium (Ti), % 0 to 0.030
0
Vanadium (V), % 0.25 to 0.35
0.050 to 0.15