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AISI 309Cb Stainless Steel vs. EN 1.4125 Stainless Steel

Both AISI 309Cb stainless steel and EN 1.4125 stainless steel are iron alloys. Both are furnished in the annealed condition. They have 79% of their average alloy composition in common. There are 33 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 309Cb stainless steel and the bottom bar is EN 1.4125 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
250
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 39
19
Fatigue Strength, MPa 200
300
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 78
77
Shear Strength, MPa 390
500
Tensile Strength: Ultimate (UTS), MPa 580
800
Tensile Strength: Yield (Proof), MPa 230
470

Thermal Properties

Latent Heat of Fusion, J/g 300
280
Maximum Temperature: Corrosion, °C 510
390
Maximum Temperature: Mechanical, °C 1090
870
Melting Completion (Liquidus), °C 1420
1430
Melting Onset (Solidus), °C 1380
1390
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 15
15
Thermal Expansion, µm/m-K 16
10

Electrical Properties

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

Otherwise Unclassified Properties

Base Metal Price, % relative 23
9.0
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 4.1
2.3
Embodied Energy, MJ/kg 59
32
Embodied Water, L/kg 170
120

Common Calculations

PREN (Pitting Resistance) 23
19
Resilience: Ultimate (Unit Rupture Work), MJ/m3 180
130
Resilience: Unit (Modulus of Resilience), kJ/m3 140
570
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 20
29
Strength to Weight: Bending, points 20
25
Thermal Diffusivity, mm2/s 4.0
4.1
Thermal Shock Resistance, points 13
29

Alloy Composition

Carbon (C), % 0 to 0.080
1.0 to 1.2
Chromium (Cr), % 22 to 24
16 to 18
Iron (Fe), % 56 to 66
78 to 82.7
Manganese (Mn), % 0 to 2.0
0 to 1.0
Molybdenum (Mo), % 0
0.4 to 0.8
Nickel (Ni), % 12 to 16
0
Niobium (Nb), % 0 to 1.1
0
Phosphorus (P), % 0 to 0.045
0 to 0.040
Silicon (Si), % 0 to 0.75
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.015