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AISI 309 Stainless Steel vs. EN 1.4550 Stainless Steel

Both AISI 309 stainless steel and EN 1.4550 stainless steel are iron alloys. They have a moderately high 92% 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 309 stainless steel and the bottom bar is EN 1.4550 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180 to 210
200
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 34 to 47
42
Fatigue Strength, MPa 250 to 280
210
Poisson's Ratio 0.27
0.28
Shear Modulus, GPa 78
77
Shear Strength, MPa 420 to 470
430
Tensile Strength: Ultimate (UTS), MPa 600 to 710
620
Tensile Strength: Yield (Proof), MPa 260 to 350
230

Thermal Properties

Latent Heat of Fusion, J/g 290
290
Maximum Temperature: Corrosion, °C 440
480
Maximum Temperature: Mechanical, °C 980
940
Melting Completion (Liquidus), °C 1450
1430
Melting Onset (Solidus), °C 1400
1390
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 16
15
Thermal Expansion, µm/m-K 15
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 19
18
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 3.6
3.6
Embodied Energy, MJ/kg 51
51
Embodied Water, L/kg 170
140

Common Calculations

PREN (Pitting Resistance) 23
18
Resilience: Ultimate (Unit Rupture Work), MJ/m3 200 to 230
210
Resilience: Unit (Modulus of Resilience), kJ/m3 170 to 310
140
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 21 to 25
22
Strength to Weight: Bending, points 20 to 23
21
Thermal Diffusivity, mm2/s 4.3
4.0
Thermal Shock Resistance, points 14 to 16
14

Alloy Composition

Carbon (C), % 0 to 0.2
0 to 0.080
Chromium (Cr), % 22 to 24
17 to 19
Iron (Fe), % 58 to 66
64.9 to 74
Manganese (Mn), % 0 to 2.0
0 to 2.0
Nickel (Ni), % 12 to 15
9.0 to 12
Niobium (Nb), % 0
0 to 1.0
Phosphorus (P), % 0 to 0.045
0 to 0.045
Silicon (Si), % 0 to 0.75
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.015