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AISI 409Cb Stainless Steel vs. EN 1.4938 Stainless Steel

Both AISI 409Cb stainless steel and EN 1.4938 stainless steel are iron alloys. They have a moderately high 95% of their average alloy composition in common.

For each property being compared, the top bar is AISI 409Cb stainless steel and the bottom bar is EN 1.4938 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 24
16 to 17
Fatigue Strength, MPa 140
390 to 520
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 75
76
Shear Strength, MPa 270
540 to 630
Tensile Strength: Ultimate (UTS), MPa 420
870 to 1030
Tensile Strength: Yield (Proof), MPa 200
640 to 870

Thermal Properties

Latent Heat of Fusion, J/g 270
270
Maximum Temperature: Corrosion, °C 440
390
Maximum Temperature: Mechanical, °C 710
750
Melting Completion (Liquidus), °C 1450
1460
Melting Onset (Solidus), °C 1410
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 25
30
Thermal Expansion, µm/m-K 10
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 8.5
10
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 2.2
3.3
Embodied Energy, MJ/kg 31
47
Embodied Water, L/kg 94
110

Common Calculations

PREN (Pitting Resistance) 11
18
Resilience: Ultimate (Unit Rupture Work), MJ/m3 83
140 to 160
Resilience: Unit (Modulus of Resilience), kJ/m3 100
1050 to 1920
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 15
31 to 37
Strength to Weight: Bending, points 16
26 to 29
Thermal Diffusivity, mm2/s 6.7
8.1
Thermal Shock Resistance, points 15
30 to 35

Alloy Composition

Carbon (C), % 0 to 0.060
0.080 to 0.15
Chromium (Cr), % 10.5 to 11.7
11 to 12.5
Iron (Fe), % 84.9 to 89.5
80.5 to 84.8
Manganese (Mn), % 0 to 1.0
0.4 to 0.9
Molybdenum (Mo), % 0
1.5 to 2.0
Nickel (Ni), % 0 to 0.5
2.0 to 3.0
Niobium (Nb), % 0 to 0.75
0
Nitrogen (N), % 0
0.020 to 0.040
Phosphorus (P), % 0 to 0.045
0 to 0.025
Silicon (Si), % 0 to 1.0
0 to 0.5
Sulfur (S), % 0 to 0.040
0 to 0.015
Vanadium (V), % 0
0.25 to 0.4