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EN 1.7703 Steel vs. EN 1.7338 Steel

Both EN 1.7703 steel and EN 1.7338 steel are iron alloys. They have a very high 98% of their average alloy composition in common.

For each property being compared, the top bar is EN 1.7703 steel and the bottom bar is EN 1.7338 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200 to 210
150
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 20
23
Fatigue Strength, MPa 320 to 340
220
Impact Strength: V-Notched Charpy, J 46
38
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 74
73
Shear Strength, MPa 420 to 430
310
Tensile Strength: Ultimate (UTS), MPa 670 to 690
490
Tensile Strength: Yield (Proof), MPa 460 to 500
300

Thermal Properties

Latent Heat of Fusion, J/g 250
260
Maximum Temperature: Mechanical, °C 460
430
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
40
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.6
7.5
Electrical Conductivity: Equal Weight (Specific), % IACS 8.7
8.6

Otherwise Unclassified Properties

Base Metal Price, % relative 4.2
3.1
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 2.5
1.6
Embodied Energy, MJ/kg 35
21
Embodied Water, L/kg 61
53

Common Calculations

PREN (Pitting Resistance) 5.6
3.1
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120 to 130
97
Resilience: Unit (Modulus of Resilience), kJ/m3 570 to 650
240
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 24
17
Strength to Weight: Bending, points 22
18
Thermal Diffusivity, mm2/s 11
11
Thermal Shock Resistance, points 19 to 20
14

Alloy Composition

Aluminum (Al), % 0
0 to 0.040
Carbon (C), % 0.11 to 0.15
0 to 0.15
Chromium (Cr), % 2.0 to 2.5
1.0 to 1.5
Copper (Cu), % 0 to 0.2
0 to 0.3
Iron (Fe), % 94.6 to 96.4
95.4 to 97.8
Manganese (Mn), % 0.3 to 0.6
0.3 to 0.6
Molybdenum (Mo), % 0.9 to 1.1
0.45 to 0.65
Nickel (Ni), % 0 to 0.25
0 to 0.3
Niobium (Nb), % 0 to 0.070
0
Nitrogen (N), % 0 to 0.012
0
Phosphorus (P), % 0 to 0.015
0 to 0.025
Silicon (Si), % 0 to 0.1
0.5 to 1.0
Sulfur (S), % 0 to 0.0050
0 to 0.010
Titanium (Ti), % 0 to 0.030
0
Vanadium (V), % 0.25 to 0.35
0