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EN 1.4859 Stainless Steel vs. SAE-AISI 4340M Steel

Both EN 1.4859 stainless steel and SAE-AISI 4340M steel are iron alloys. They have 49% 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 EN 1.4859 stainless steel and the bottom bar is SAE-AISI 4340M steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140
710
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 23
6.0
Fatigue Strength, MPa 140
690
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
72
Tensile Strength: Ultimate (UTS), MPa 490
2340
Tensile Strength: Yield (Proof), MPa 210
1240

Thermal Properties

Latent Heat of Fusion, J/g 310
280
Maximum Temperature: Mechanical, °C 1050
430
Melting Completion (Liquidus), °C 1410
1440
Melting Onset (Solidus), °C 1360
1400
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 13
38
Thermal Expansion, µm/m-K 16
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.7
7.8
Electrical Conductivity: Equal Weight (Specific), % IACS 1.9
9.1

Otherwise Unclassified Properties

Base Metal Price, % relative 36
3.9
Density, g/cm3 8.0
7.8
Embodied Carbon, kg CO2/kg material 6.2
1.9
Embodied Energy, MJ/kg 88
26
Embodied Water, L/kg 190
55

Common Calculations

PREN (Pitting Resistance) 21
2.2
Resilience: Ultimate (Unit Rupture Work), MJ/m3 91
120
Resilience: Unit (Modulus of Resilience), kJ/m3 110
4120
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 17
84
Strength to Weight: Bending, points 17
51
Thermal Diffusivity, mm2/s 3.4
10
Thermal Shock Resistance, points 11
70

Alloy Composition

Carbon (C), % 0.050 to 0.15
0.38 to 0.43
Chromium (Cr), % 19 to 21
0.7 to 1.0
Iron (Fe), % 40.3 to 49
93.3 to 94.8
Manganese (Mn), % 0 to 2.0
0.65 to 0.9
Molybdenum (Mo), % 0 to 0.5
0.35 to 0.45
Nickel (Ni), % 31 to 33
1.7 to 2.0
Niobium (Nb), % 0.5 to 1.5
0
Phosphorus (P), % 0 to 0.040
0 to 0.012
Silicon (Si), % 0.5 to 1.5
1.5 to 1.8
Sulfur (S), % 0 to 0.030
0 to 0.012
Vanadium (V), % 0
0.050 to 0.1