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EN 1.8515 Steel vs. SAE-AISI 4340M Steel

Both EN 1.8515 steel and SAE-AISI 4340M steel are iron alloys. They have a very high 97% of their average alloy composition in common. There are 33 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 1.8515 steel and the bottom bar is SAE-AISI 4340M steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 340
710
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 11
6.0
Fatigue Strength, MPa 580
690
Impact Strength: V-Notched Charpy, J 29
18
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 74
72
Shear Strength, MPa 680
1360
Tensile Strength: Ultimate (UTS), MPa 1130
2340
Tensile Strength: Yield (Proof), MPa 940
1240

Thermal Properties

Latent Heat of Fusion, J/g 250
280
Maximum Temperature: Mechanical, °C 470
430
Melting Completion (Liquidus), °C 1460
1440
Melting Onset (Solidus), °C 1420
1400
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 40
38
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.6
7.8
Electrical Conductivity: Equal Weight (Specific), % IACS 8.7
9.1

Otherwise Unclassified Properties

Base Metal Price, % relative 3.5
3.9
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.6
1.9
Embodied Energy, MJ/kg 22
26
Embodied Water, L/kg 60
55

Common Calculations

PREN (Pitting Resistance) 4.4
2.2
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
120
Resilience: Unit (Modulus of Resilience), kJ/m3 2310
4120
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 40
84
Strength to Weight: Bending, points 31
51
Thermal Diffusivity, mm2/s 11
10
Thermal Shock Resistance, points 33
70

Alloy Composition

Carbon (C), % 0.28 to 0.35
0.38 to 0.43
Chromium (Cr), % 2.8 to 3.3
0.7 to 1.0
Iron (Fe), % 94.7 to 96.5
93.3 to 94.8
Manganese (Mn), % 0.4 to 0.7
0.65 to 0.9
Molybdenum (Mo), % 0.3 to 0.5
0.35 to 0.45
Nickel (Ni), % 0 to 0.3
1.7 to 2.0
Phosphorus (P), % 0 to 0.025
0 to 0.012
Silicon (Si), % 0 to 0.4
1.5 to 1.8
Sulfur (S), % 0 to 0.035
0 to 0.012
Vanadium (V), % 0
0.050 to 0.1