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EN 1.4749 Stainless Steel vs. AISI 309Cb Stainless Steel

Both EN 1.4749 stainless steel and AISI 309Cb stainless steel are iron alloys. Both are furnished in the annealed condition. They have 85% 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 EN 1.4749 stainless steel and the bottom bar is AISI 309Cb stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180
190
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 16
39
Fatigue Strength, MPa 190
200
Poisson's Ratio 0.27
0.28
Shear Modulus, GPa 80
78
Shear Strength, MPa 370
390
Tensile Strength: Ultimate (UTS), MPa 600
580
Tensile Strength: Yield (Proof), MPa 320
230

Thermal Properties

Latent Heat of Fusion, J/g 300
300
Maximum Temperature: Corrosion, °C 450
510
Maximum Temperature: Mechanical, °C 1100
1090
Melting Completion (Liquidus), °C 1420
1420
Melting Onset (Solidus), °C 1380
1380
Specific Heat Capacity, J/kg-K 490
480
Thermal Conductivity, W/m-K 17
15
Thermal Expansion, µm/m-K 9.6
16

Electrical Properties

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

Otherwise Unclassified Properties

Base Metal Price, % relative 13
23
Density, g/cm3 7.6
7.8
Embodied Carbon, kg CO2/kg material 2.5
4.1
Embodied Energy, MJ/kg 36
59
Embodied Water, L/kg 160
170

Common Calculations

PREN (Pitting Resistance) 31
23
Resilience: Ultimate (Unit Rupture Work), MJ/m3 80
180
Resilience: Unit (Modulus of Resilience), kJ/m3 250
140
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 26
25
Strength to Weight: Axial, points 22
20
Strength to Weight: Bending, points 21
20
Thermal Diffusivity, mm2/s 4.6
4.0
Thermal Shock Resistance, points 22
13

Alloy Composition

Carbon (C), % 0.15 to 0.2
0 to 0.080
Chromium (Cr), % 26 to 29
22 to 24
Iron (Fe), % 68.5 to 73.7
56 to 66
Manganese (Mn), % 0 to 1.0
0 to 2.0
Nickel (Ni), % 0
12 to 16
Niobium (Nb), % 0
0 to 1.1
Nitrogen (N), % 0.15 to 0.25
0
Phosphorus (P), % 0 to 0.040
0 to 0.045
Silicon (Si), % 0 to 1.0
0 to 0.75
Sulfur (S), % 0 to 0.015
0 to 0.030