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EN 1.4971 Stainless Steel vs. AISI 309Cb Stainless Steel

Both EN 1.4971 stainless steel and AISI 309Cb stainless steel are iron alloys. They have 68% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is EN 1.4971 stainless steel and the bottom bar is AISI 309Cb stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 240
190
Elastic (Young's, Tensile) Modulus, GPa 210
200
Elongation at Break, % 34
39
Fatigue Strength, MPa 270
200
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 81
78
Shear Strength, MPa 530
390
Tensile Strength: Ultimate (UTS), MPa 800
580
Tensile Strength: Yield (Proof), MPa 340
230

Thermal Properties

Latent Heat of Fusion, J/g 300
300
Maximum Temperature: Corrosion, °C 570
510
Maximum Temperature: Mechanical, °C 1100
1090
Melting Completion (Liquidus), °C 1460
1420
Melting Onset (Solidus), °C 1410
1380
Specific Heat Capacity, J/kg-K 450
480
Thermal Conductivity, W/m-K 13
15
Thermal Expansion, µm/m-K 15
16

Otherwise Unclassified Properties

Base Metal Price, % relative 70
23
Density, g/cm3 8.4
7.8
Embodied Carbon, kg CO2/kg material 7.6
4.1
Embodied Energy, MJ/kg 110
59
Embodied Water, L/kg 300
170

Common Calculations

PREN (Pitting Resistance) 38
23
Resilience: Ultimate (Unit Rupture Work), MJ/m3 220
180
Resilience: Unit (Modulus of Resilience), kJ/m3 280
140
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 26
20
Strength to Weight: Bending, points 23
20
Thermal Diffusivity, mm2/s 3.4
4.0
Thermal Shock Resistance, points 19
13

Alloy Composition

Carbon (C), % 0.080 to 0.16
0 to 0.080
Chromium (Cr), % 20 to 22.5
22 to 24
Cobalt (Co), % 18.5 to 21
0
Iron (Fe), % 24.3 to 37.1
56 to 66
Manganese (Mn), % 0 to 2.0
0 to 2.0
Molybdenum (Mo), % 2.5 to 3.5
0
Nickel (Ni), % 19 to 21
12 to 16
Niobium (Nb), % 0.75 to 1.3
0 to 1.1
Nitrogen (N), % 0.1 to 0.2
0
Phosphorus (P), % 0 to 0.035
0 to 0.045
Silicon (Si), % 0 to 1.0
0 to 0.75
Sulfur (S), % 0 to 0.015
0 to 0.030
Tungsten (W), % 2.0 to 3.0
0