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SAE-AISI 4340 Steel vs. EN 1.4848 Stainless Steel

Both SAE-AISI 4340 steel and EN 1.4848 stainless steel are iron alloys. They have 55% of their average alloy composition in common. There are 30 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 4340 steel and the bottom bar is EN 1.4848 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210 to 360
150
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 12 to 22
9.0
Fatigue Strength, MPa 330 to 740
130
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
78
Tensile Strength: Ultimate (UTS), MPa 690 to 1280
510
Tensile Strength: Yield (Proof), MPa 470 to 1150
250

Thermal Properties

Latent Heat of Fusion, J/g 250
320
Maximum Temperature: Mechanical, °C 430
1100
Melting Completion (Liquidus), °C 1460
1390
Melting Onset (Solidus), °C 1420
1340
Specific Heat Capacity, J/kg-K 470
490
Thermal Conductivity, W/m-K 44
15
Thermal Expansion, µm/m-K 13
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.5
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 8.6
2.3

Otherwise Unclassified Properties

Base Metal Price, % relative 3.5
25
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.7
4.4
Embodied Energy, MJ/kg 22
63
Embodied Water, L/kg 53
200

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 79 to 170
38
Resilience: Unit (Modulus of Resilience), kJ/m3 590 to 3490
150
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 24 to 45
18
Strength to Weight: Bending, points 22 to 33
18
Thermal Diffusivity, mm2/s 12
3.9
Thermal Shock Resistance, points 20 to 38
11

Alloy Composition

Carbon (C), % 0.38 to 0.43
0.3 to 0.5
Chromium (Cr), % 0.7 to 0.9
24 to 27
Iron (Fe), % 95.1 to 96.3
45.4 to 55.7
Manganese (Mn), % 0.6 to 0.8
0 to 2.0
Molybdenum (Mo), % 0.2 to 0.3
0 to 0.5
Nickel (Ni), % 1.7 to 2.0
19 to 22
Phosphorus (P), % 0 to 0.035
0 to 0.040
Silicon (Si), % 0.15 to 0.35
1.0 to 2.5
Sulfur (S), % 0 to 0.040
0 to 0.030