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EN 1.4542 Stainless Steel vs. SAE-AISI 4340M Steel

Both EN 1.4542 stainless steel and SAE-AISI 4340M steel are iron alloys. They have 78% 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 1.4542 stainless steel and the bottom bar is SAE-AISI 4340M steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 5.7 to 20
6.0
Fatigue Strength, MPa 370 to 640
690
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
72
Shear Strength, MPa 550 to 860
1360
Tensile Strength: Ultimate (UTS), MPa 880 to 1470
2340
Tensile Strength: Yield (Proof), MPa 580 to 1300
1240

Thermal Properties

Latent Heat of Fusion, J/g 280
280
Maximum Temperature: Mechanical, °C 860
430
Melting Completion (Liquidus), °C 1430
1440
Melting Onset (Solidus), °C 1380
1400
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 16
38
Thermal Expansion, µm/m-K 11
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
7.8
Electrical Conductivity: Equal Weight (Specific), % IACS 2.8
9.1

Otherwise Unclassified Properties

Base Metal Price, % relative 13
3.9
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 2.7
1.9
Embodied Energy, MJ/kg 39
26
Embodied Water, L/kg 130
55

Common Calculations

PREN (Pitting Resistance) 17
2.2
Resilience: Ultimate (Unit Rupture Work), MJ/m3 62 to 160
120
Resilience: Unit (Modulus of Resilience), kJ/m3 880 to 4360
4120
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 31 to 52
84
Strength to Weight: Bending, points 26 to 37
51
Thermal Diffusivity, mm2/s 4.3
10
Thermal Shock Resistance, points 29 to 49
70

Alloy Composition

Carbon (C), % 0 to 0.070
0.38 to 0.43
Chromium (Cr), % 15 to 17
0.7 to 1.0
Copper (Cu), % 3.0 to 5.0
0
Iron (Fe), % 69.6 to 79
93.3 to 94.8
Manganese (Mn), % 0 to 1.5
0.65 to 0.9
Molybdenum (Mo), % 0 to 0.6
0.35 to 0.45
Nickel (Ni), % 3.0 to 5.0
1.7 to 2.0
Niobium (Nb), % 0 to 0.45
0
Phosphorus (P), % 0 to 0.040
0 to 0.012
Silicon (Si), % 0 to 0.7
1.5 to 1.8
Sulfur (S), % 0 to 0.015
0 to 0.012
Vanadium (V), % 0
0.050 to 0.1