MakeItFrom.com
Menu (ESC)

SAE-AISI 4340M Steel vs. EN 1.4658 Stainless Steel

Both SAE-AISI 4340M steel and EN 1.4658 stainless steel are iron alloys. They have 61% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (5, 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 1.4658 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 710
260
Elastic (Young's, Tensile) Modulus, GPa 190
210
Elongation at Break, % 6.0
28
Fatigue Strength, MPa 690
530
Impact Strength: V-Notched Charpy, J 18
110
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 72
81
Shear Strength, MPa 1360
580
Tensile Strength: Ultimate (UTS), MPa 2340
900
Tensile Strength: Yield (Proof), MPa 1240
730

Thermal Properties

Latent Heat of Fusion, J/g 280
300
Maximum Temperature: Mechanical, °C 430
1100
Melting Completion (Liquidus), °C 1440
1450
Melting Onset (Solidus), °C 1400
1400
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 38
16
Thermal Expansion, µm/m-K 13
13

Otherwise Unclassified Properties

Base Metal Price, % relative 3.9
25
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.9
4.5
Embodied Energy, MJ/kg 26
61
Embodied Water, L/kg 55
200

Common Calculations

PREN (Pitting Resistance) 2.2
49
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
240
Resilience: Unit (Modulus of Resilience), kJ/m3 4120
1280
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 84
32
Strength to Weight: Bending, points 51
26
Thermal Diffusivity, mm2/s 10
4.3
Thermal Shock Resistance, points 70
24

Alloy Composition

Carbon (C), % 0.38 to 0.43
0 to 0.030
Chromium (Cr), % 0.7 to 1.0
26 to 29
Cobalt (Co), % 0
0.5 to 2.0
Copper (Cu), % 0
0 to 1.0
Iron (Fe), % 93.3 to 94.8
50.9 to 63.7
Manganese (Mn), % 0.65 to 0.9
0 to 1.5
Molybdenum (Mo), % 0.35 to 0.45
4.0 to 5.0
Nickel (Ni), % 1.7 to 2.0
5.5 to 9.5
Nitrogen (N), % 0
0.3 to 0.5
Phosphorus (P), % 0 to 0.012
0 to 0.035
Silicon (Si), % 1.5 to 1.8
0 to 0.5
Sulfur (S), % 0 to 0.012
0 to 0.010
Vanadium (V), % 0.050 to 0.1
0