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EN 1.6311 Steel vs. EN 1.7338 Steel

Both EN 1.6311 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 1.6311 steel and the bottom bar is EN 1.7338 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200
150
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 19
23
Fatigue Strength, MPa 340
220
Impact Strength: V-Notched Charpy, J 51
38
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Shear Strength, MPa 400
310
Tensile Strength: Ultimate (UTS), MPa 650
490
Tensile Strength: Yield (Proof), MPa 490
300

Thermal Properties

Latent Heat of Fusion, J/g 250
260
Maximum Temperature: Mechanical, °C 410
430
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
40
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
7.5
Electrical Conductivity: Equal Weight (Specific), % IACS 8.5
8.6

Otherwise Unclassified Properties

Base Metal Price, % relative 2.9
3.1
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 1.6
1.6
Embodied Energy, MJ/kg 22
21
Embodied Water, L/kg 51
53

Common Calculations

PREN (Pitting Resistance) 2.1
3.1
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
97
Resilience: Unit (Modulus of Resilience), kJ/m3 650
240
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 23
17
Strength to Weight: Bending, points 21
18
Thermal Diffusivity, mm2/s 10
11
Thermal Shock Resistance, points 19
14

Alloy Composition

Aluminum (Al), % 0
0 to 0.040
Carbon (C), % 0.15 to 0.23
0 to 0.15
Chromium (Cr), % 0 to 0.5
1.0 to 1.5
Copper (Cu), % 0 to 0.2
0 to 0.3
Iron (Fe), % 95.9 to 98
95.4 to 97.8
Manganese (Mn), % 1.0 to 1.5
0.3 to 0.6
Molybdenum (Mo), % 0.45 to 0.6
0.45 to 0.65
Nickel (Ni), % 0.4 to 0.8
0 to 0.3
Nitrogen (N), % 0 to 0.012
0
Phosphorus (P), % 0 to 0.035
0 to 0.025
Silicon (Si), % 0 to 0.4
0.5 to 1.0
Sulfur (S), % 0 to 0.035
0 to 0.010
Vanadium (V), % 0 to 0.020
0