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EN 1.4469 Stainless Steel vs. SAE-AISI 4340M Steel

Both EN 1.4469 stainless steel and SAE-AISI 4340M steel are iron alloys. They have 65% 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 1.4469 stainless steel and the bottom bar is SAE-AISI 4340M steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
190
Elongation at Break, % 25
6.0
Fatigue Strength, MPa 380
690
Impact Strength: V-Notched Charpy, J 56
18
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 81
72
Tensile Strength: Ultimate (UTS), MPa 740
2340
Tensile Strength: Yield (Proof), MPa 550
1240

Thermal Properties

Latent Heat of Fusion, J/g 300
280
Maximum Temperature: Mechanical, °C 1100
430
Melting Completion (Liquidus), °C 1450
1440
Melting Onset (Solidus), °C 1400
1400
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 17
38
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
7.8
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
9.1

Otherwise Unclassified Properties

Base Metal Price, % relative 21
3.9
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 4.1
1.9
Embodied Energy, MJ/kg 57
26
Embodied Water, L/kg 180
55

Common Calculations

PREN (Pitting Resistance) 42
2.2
Resilience: Ultimate (Unit Rupture Work), MJ/m3 170
120
Resilience: Unit (Modulus of Resilience), kJ/m3 730
4120
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 26
84
Strength to Weight: Bending, points 23
51
Thermal Diffusivity, mm2/s 4.6
10
Thermal Shock Resistance, points 20
70

Alloy Composition

Carbon (C), % 0 to 0.030
0.38 to 0.43
Chromium (Cr), % 25 to 27
0.7 to 1.0
Copper (Cu), % 0 to 1.3
0
Iron (Fe), % 56.4 to 65.9
93.3 to 94.8
Manganese (Mn), % 0 to 1.0
0.65 to 0.9
Molybdenum (Mo), % 3.0 to 5.0
0.35 to 0.45
Nickel (Ni), % 6.0 to 8.0
1.7 to 2.0
Nitrogen (N), % 0.12 to 0.22
0
Phosphorus (P), % 0 to 0.035
0 to 0.012
Silicon (Si), % 0 to 1.0
1.5 to 1.8
Sulfur (S), % 0 to 0.025
0 to 0.012
Vanadium (V), % 0
0.050 to 0.1