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AISI 439 Stainless Steel vs. EN 1.4125 Stainless Steel

Both AISI 439 stainless steel and EN 1.4125 stainless steel are iron alloys. Both are furnished in the annealed condition. They have a very high 98% of their average alloy composition in common. There are 33 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 AISI 439 stainless steel and the bottom bar is EN 1.4125 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160
250
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 23
19
Fatigue Strength, MPa 170
300
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
77
Shear Strength, MPa 310
500
Tensile Strength: Ultimate (UTS), MPa 490
800
Tensile Strength: Yield (Proof), MPa 250
470

Thermal Properties

Latent Heat of Fusion, J/g 280
280
Maximum Temperature: Corrosion, °C 530
390
Maximum Temperature: Mechanical, °C 890
870
Melting Completion (Liquidus), °C 1510
1430
Melting Onset (Solidus), °C 1430
1390
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 25
15
Thermal Expansion, µm/m-K 11
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 3.4
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
9.0
Density, g/cm3 7.7
7.7
Embodied Carbon, kg CO2/kg material 2.3
2.3
Embodied Energy, MJ/kg 34
32
Embodied Water, L/kg 120
120

Common Calculations

PREN (Pitting Resistance) 18
19
Resilience: Ultimate (Unit Rupture Work), MJ/m3 95
130
Resilience: Unit (Modulus of Resilience), kJ/m3 160
570
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 18
29
Strength to Weight: Bending, points 18
25
Thermal Diffusivity, mm2/s 6.7
4.1
Thermal Shock Resistance, points 16
29

Alloy Composition

Aluminum (Al), % 0 to 0.15
0
Carbon (C), % 0 to 0.030
1.0 to 1.2
Chromium (Cr), % 17 to 19
16 to 18
Iron (Fe), % 77.1 to 82.8
78 to 82.7
Manganese (Mn), % 0 to 1.0
0 to 1.0
Molybdenum (Mo), % 0
0.4 to 0.8
Nickel (Ni), % 0 to 0.5
0
Nitrogen (N), % 0 to 0.030
0
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.015
Titanium (Ti), % 0.2 to 1.1
0