MakeItFrom.com
Menu (ESC)

SAE-AISI 4340M Steel vs. EN 1.6579 Steel

Both SAE-AISI 4340M steel and EN 1.6579 steel are iron alloys. They have a very high 98% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI 4340M steel and the bottom bar is EN 1.6579 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 710
260 to 290
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 6.0
11 to 14
Fatigue Strength, MPa 690
380 to 570
Impact Strength: V-Notched Charpy, J 18
35 to 41
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 72
73
Tensile Strength: Ultimate (UTS), MPa 2340
850 to 980
Tensile Strength: Yield (Proof), MPa 1240
600 to 910

Thermal Properties

Latent Heat of Fusion, J/g 280
250
Maximum Temperature: Mechanical, °C 430
440
Melting Completion (Liquidus), °C 1440
1460
Melting Onset (Solidus), °C 1400
1410
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 38
39
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.8
7.7
Electrical Conductivity: Equal Weight (Specific), % IACS 9.1
8.8

Otherwise Unclassified Properties

Base Metal Price, % relative 3.9
3.7
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.9
1.7
Embodied Energy, MJ/kg 26
22
Embodied Water, L/kg 55
56

Common Calculations

PREN (Pitting Resistance) 2.2
2.4
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
100 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 4120
950 to 2210
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 84
30 to 35
Strength to Weight: Bending, points 51
25 to 28
Thermal Diffusivity, mm2/s 10
11
Thermal Shock Resistance, points 70
25 to 29

Alloy Composition

Carbon (C), % 0.38 to 0.43
0.32 to 0.38
Chromium (Cr), % 0.7 to 1.0
1.4 to 1.7
Iron (Fe), % 93.3 to 94.8
94.2 to 96.1
Manganese (Mn), % 0.65 to 0.9
0.6 to 1.0
Molybdenum (Mo), % 0.35 to 0.45
0.15 to 0.35
Nickel (Ni), % 1.7 to 2.0
1.4 to 1.7
Phosphorus (P), % 0 to 0.012
0 to 0.025
Silicon (Si), % 1.5 to 1.8
0 to 0.6
Sulfur (S), % 0 to 0.012
0 to 0.030
Vanadium (V), % 0.050 to 0.1
0