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EN 1.3956 Stainless Steel vs. AISI 309 Stainless Steel

Both EN 1.3956 stainless steel and AISI 309 stainless steel are iron alloys. They have a moderately high 93% of their average alloy composition in common. There are 27 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is EN 1.3956 stainless steel and the bottom bar is AISI 309 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 27
34 to 47
Fatigue Strength, MPa 240
250 to 280
Poisson's Ratio 0.28
0.27
Shear Modulus, GPa 79
78
Tensile Strength: Ultimate (UTS), MPa 650
600 to 710
Tensile Strength: Yield (Proof), MPa 330
260 to 350

Thermal Properties

Latent Heat of Fusion, J/g 300
290
Maximum Temperature: Corrosion, °C 460
440
Maximum Temperature: Mechanical, °C 1080
980
Melting Completion (Liquidus), °C 1420
1450
Melting Onset (Solidus), °C 1380
1400
Specific Heat Capacity, J/kg-K 480
480
Thermal Expansion, µm/m-K 13
15

Otherwise Unclassified Properties

Base Metal Price, % relative 22
19
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 4.8
3.6
Embodied Energy, MJ/kg 68
51
Embodied Water, L/kg 180
170

Common Calculations

PREN (Pitting Resistance) 34
23
Resilience: Ultimate (Unit Rupture Work), MJ/m3 150
200 to 230
Resilience: Unit (Modulus of Resilience), kJ/m3 270
170 to 310
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 23
21 to 25
Strength to Weight: Bending, points 21
20 to 23
Thermal Shock Resistance, points 18
14 to 16

Alloy Composition

Carbon (C), % 0 to 0.060
0 to 0.2
Chromium (Cr), % 20.5 to 23.5
22 to 24
Iron (Fe), % 51.9 to 62.1
58 to 66
Manganese (Mn), % 4.0 to 6.0
0 to 2.0
Molybdenum (Mo), % 1.5 to 3.0
0
Nickel (Ni), % 11.5 to 13.5
12 to 15
Niobium (Nb), % 0.1 to 0.3
0
Nitrogen (N), % 0.2 to 0.4
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 0.030
0 to 0.030
Vanadium (V), % 0.1 to 0.3
0