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EN 1.6958 Steel vs. EN 1.7703 Steel

Both EN 1.6958 steel and EN 1.7703 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 1.6958 steel and the bottom bar is EN 1.7703 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 340
200 to 210
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 16
20
Fatigue Strength, MPa 700
320 to 340
Impact Strength: V-Notched Charpy, J 63
46
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
74
Shear Strength, MPa 700
420 to 430
Tensile Strength: Ultimate (UTS), MPa 1140
670 to 690
Tensile Strength: Yield (Proof), MPa 1070
460 to 500

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 450
460
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 47
39
Thermal Expansion, µm/m-K 11
13

Electrical Properties

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

Otherwise Unclassified Properties

Base Metal Price, % relative 5.0
4.2
Density, g/cm3 7.9
7.9
Embodied Carbon, kg CO2/kg material 2.0
2.5
Embodied Energy, MJ/kg 27
35
Embodied Water, L/kg 60
61

Common Calculations

PREN (Pitting Resistance) 2.9
5.6
Resilience: Ultimate (Unit Rupture Work), MJ/m3 180
120 to 130
Resilience: Unit (Modulus of Resilience), kJ/m3 3050
570 to 650
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 40
24
Strength to Weight: Bending, points 31
22
Thermal Diffusivity, mm2/s 13
11
Thermal Shock Resistance, points 39
19 to 20

Alloy Composition

Aluminum (Al), % 0.0050 to 0.050
0
Carbon (C), % 0.25 to 0.3
0.11 to 0.15
Chromium (Cr), % 1.2 to 1.7
2.0 to 2.5
Copper (Cu), % 0
0 to 0.2
Iron (Fe), % 92.6 to 94.5
94.6 to 96.4
Manganese (Mn), % 0.2 to 0.5
0.3 to 0.6
Molybdenum (Mo), % 0.35 to 0.55
0.9 to 1.1
Nickel (Ni), % 3.3 to 3.8
0 to 0.25
Niobium (Nb), % 0
0 to 0.070
Nitrogen (N), % 0
0 to 0.012
Phosphorus (P), % 0 to 0.020
0 to 0.015
Silicon (Si), % 0.15 to 0.3
0 to 0.1
Sulfur (S), % 0 to 0.015
0 to 0.0050
Titanium (Ti), % 0
0 to 0.030
Vanadium (V), % 0 to 0.12
0.25 to 0.35