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AISI 439 Stainless Steel vs. S41425 Stainless Steel

Both AISI 439 stainless steel and S41425 stainless steel are iron alloys. They have a moderately high 92% of their average alloy composition in common. There are 34 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 AISI 439 stainless steel and the bottom bar is S41425 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160
280
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 23
17
Fatigue Strength, MPa 170
450
Poisson's Ratio 0.28
0.28
Reduction in Area, % 51
51
Shear Modulus, GPa 77
77
Shear Strength, MPa 310
570
Tensile Strength: Ultimate (UTS), MPa 490
920
Tensile Strength: Yield (Proof), MPa 250
750

Thermal Properties

Latent Heat of Fusion, J/g 280
280
Maximum Temperature: Corrosion, °C 530
390
Maximum Temperature: Mechanical, °C 890
810
Melting Completion (Liquidus), °C 1510
1450
Melting Onset (Solidus), °C 1430
1410
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 25
16
Thermal Expansion, µm/m-K 11
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
2.3
Electrical Conductivity: Equal Weight (Specific), % IACS 3.4
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
13
Density, g/cm3 7.7
7.9
Embodied Carbon, kg CO2/kg material 2.3
2.9
Embodied Energy, MJ/kg 34
40
Embodied Water, L/kg 120
120

Common Calculations

PREN (Pitting Resistance) 18
21
Resilience: Ultimate (Unit Rupture Work), MJ/m3 95
150
Resilience: Unit (Modulus of Resilience), kJ/m3 160
1420
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 18
33
Strength to Weight: Bending, points 18
27
Thermal Diffusivity, mm2/s 6.7
4.4
Thermal Shock Resistance, points 16
33

Alloy Composition

Aluminum (Al), % 0 to 0.15
0
Carbon (C), % 0 to 0.030
0 to 0.050
Chromium (Cr), % 17 to 19
12 to 15
Copper (Cu), % 0
0 to 0.3
Iron (Fe), % 77.1 to 82.8
74 to 81.9
Manganese (Mn), % 0 to 1.0
0.5 to 1.0
Molybdenum (Mo), % 0
1.5 to 2.0
Nickel (Ni), % 0 to 0.5
4.0 to 7.0
Nitrogen (N), % 0 to 0.030
0.060 to 0.12
Phosphorus (P), % 0 to 0.040
0 to 0.020
Silicon (Si), % 0 to 1.0
0 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.0050
Titanium (Ti), % 0.2 to 1.1
0