MakeItFrom.com
Menu (ESC)

SAE-AISI 4340 Steel vs. EN 1.4057 Stainless Steel

Both SAE-AISI 4340 steel and EN 1.4057 stainless steel are iron alloys. They have 84% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (4, 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 1.4057 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 12 to 22
11 to 17
Fatigue Strength, MPa 330 to 740
320 to 430
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
77
Shear Strength, MPa 430 to 770
520 to 580
Tensile Strength: Ultimate (UTS), MPa 690 to 1280
840 to 980
Tensile Strength: Yield (Proof), MPa 470 to 1150
530 to 790

Thermal Properties

Latent Heat of Fusion, J/g 250
280
Maximum Temperature: Mechanical, °C 430
850
Melting Completion (Liquidus), °C 1460
1440
Melting Onset (Solidus), °C 1420
1390
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 44
25
Thermal Expansion, µm/m-K 13
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.5
2.5
Electrical Conductivity: Equal Weight (Specific), % IACS 8.6
2.9

Otherwise Unclassified Properties

Base Metal Price, % relative 3.5
9.5
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 1.7
2.2
Embodied Energy, MJ/kg 22
32
Embodied Water, L/kg 53
120

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 79 to 170
96 to 130
Resilience: Unit (Modulus of Resilience), kJ/m3 590 to 3490
700 to 1610
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 24 to 45
30 to 35
Strength to Weight: Bending, points 22 to 33
26 to 28
Thermal Diffusivity, mm2/s 12
6.7
Thermal Shock Resistance, points 20 to 38
30 to 35

Alloy Composition

Carbon (C), % 0.38 to 0.43
0.12 to 0.22
Chromium (Cr), % 0.7 to 0.9
15 to 17
Iron (Fe), % 95.1 to 96.3
77.7 to 83.4
Manganese (Mn), % 0.6 to 0.8
0 to 1.5
Molybdenum (Mo), % 0.2 to 0.3
0
Nickel (Ni), % 1.7 to 2.0
1.5 to 2.5
Phosphorus (P), % 0 to 0.035
0 to 0.040
Silicon (Si), % 0.15 to 0.35
0 to 1.0
Sulfur (S), % 0 to 0.040
0 to 0.015

Comparable Variants