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SAE-AISI 4042 Steel vs. EN 1.4109 Stainless Steel

Both SAE-AISI 4042 steel and EN 1.4109 stainless steel are iron alloys. They have 84% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI 4042 steel and the bottom bar is EN 1.4109 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200
250
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 13
19
Fatigue Strength, MPa 360
270
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
76
Shear Strength, MPa 410
480
Tensile Strength: Ultimate (UTS), MPa 680
770
Tensile Strength: Yield (Proof), MPa 570
420

Thermal Properties

Latent Heat of Fusion, J/g 250
280
Maximum Temperature: Mechanical, °C 400
820
Melting Completion (Liquidus), °C 1460
1440
Melting Onset (Solidus), °C 1420
1400
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 49
30
Thermal Expansion, µm/m-K 12
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.1
2.7
Electrical Conductivity: Equal Weight (Specific), % IACS 8.2
3.1

Otherwise Unclassified Properties

Base Metal Price, % relative 2.1
8.5
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 1.5
2.2
Embodied Energy, MJ/kg 19
30
Embodied Water, L/kg 47
110

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 81
120
Resilience: Unit (Modulus of Resilience), kJ/m3 860
460
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 24
28
Strength to Weight: Bending, points 22
24
Thermal Diffusivity, mm2/s 13
8.1
Thermal Shock Resistance, points 22
28

Alloy Composition

Carbon (C), % 0.4 to 0.45
0.6 to 0.75
Chromium (Cr), % 0
14 to 16
Iron (Fe), % 97.9 to 98.6
80.7 to 85
Manganese (Mn), % 0.7 to 0.9
0 to 1.0
Molybdenum (Mo), % 0.2 to 0.3
0.4 to 0.8
Phosphorus (P), % 0 to 0.035
0 to 0.040
Silicon (Si), % 0.15 to 0.35
0 to 0.7
Sulfur (S), % 0 to 0.040
0 to 0.015