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EN 1.4931 Steel vs. EN 1.7390 Steel

Both EN 1.4931 steel and EN 1.7390 steel are iron alloys. They have a moderately high 91% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is EN 1.4931 steel and the bottom bar is EN 1.7390 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 240
210
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 17
16
Fatigue Strength, MPa 410
310
Impact Strength: V-Notched Charpy, J 30
46
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
74
Tensile Strength: Ultimate (UTS), MPa 810
710
Tensile Strength: Yield (Proof), MPa 620
480

Thermal Properties

Latent Heat of Fusion, J/g 270
260
Maximum Temperature: Mechanical, °C 600
510
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 24
40
Thermal Expansion, µm/m-K 14
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 9.8
8.1
Electrical Conductivity: Equal Weight (Specific), % IACS 11
9.3

Otherwise Unclassified Properties

Base Metal Price, % relative 8.5
4.3
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 2.9
1.7
Embodied Energy, MJ/kg 42
23
Embodied Water, L/kg 100
69

Common Calculations

PREN (Pitting Resistance) 16
6.8
Resilience: Ultimate (Unit Rupture Work), MJ/m3 130
100
Resilience: Unit (Modulus of Resilience), kJ/m3 970
600
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 29
25
Strength to Weight: Bending, points 25
23
Thermal Diffusivity, mm2/s 6.5
11
Thermal Shock Resistance, points 22
20

Alloy Composition

Carbon (C), % 0.2 to 0.26
0 to 0.18
Chromium (Cr), % 11.3 to 12.2
4.0 to 6.0
Iron (Fe), % 83.2 to 86.8
91.9 to 95.3
Manganese (Mn), % 0.5 to 0.8
0.3 to 0.8
Molybdenum (Mo), % 1.0 to 1.2
0.45 to 0.65
Nickel (Ni), % 0 to 1.0
0
Phosphorus (P), % 0 to 0.030
0 to 0.025
Silicon (Si), % 0 to 0.4
0 to 0.4
Sulfur (S), % 0 to 0.020
0 to 0.015
Tungsten (W), % 0 to 0.5
0
Vanadium (V), % 0.25 to 0.35
0