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EN 1.4309 Stainless Steel vs. EN 1.4547 Stainless Steel

Both EN 1.4309 stainless steel and EN 1.4547 stainless steel are iron alloys. Both are furnished in the solution annealed (AT) condition. They have 84% of their average alloy composition in common. There are 33 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is EN 1.4309 stainless steel and the bottom bar is EN 1.4547 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140
230
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 34
39
Fatigue Strength, MPa 170
290
Impact Strength: V-Notched Charpy, J 90
90
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
80
Tensile Strength: Ultimate (UTS), MPa 490
750
Tensile Strength: Yield (Proof), MPa 210
340

Thermal Properties

Latent Heat of Fusion, J/g 290
300
Maximum Temperature: Corrosion, °C 420
420
Maximum Temperature: Mechanical, °C 960
1090
Melting Completion (Liquidus), °C 1420
1470
Melting Onset (Solidus), °C 1380
1420
Specific Heat Capacity, J/kg-K 480
460
Thermal Conductivity, W/m-K 15
14
Thermal Expansion, µm/m-K 17
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.6
2.3

Otherwise Unclassified Properties

Base Metal Price, % relative 16
28
Density, g/cm3 7.8
8.0
Embodied Carbon, kg CO2/kg material 3.1
5.6
Embodied Energy, MJ/kg 45
75
Embodied Water, L/kg 150
190

Common Calculations

PREN (Pitting Resistance) 21
45
Resilience: Ultimate (Unit Rupture Work), MJ/m3 140
240
Resilience: Unit (Modulus of Resilience), kJ/m3 110
290
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 18
26
Strength to Weight: Bending, points 18
23
Thermal Diffusivity, mm2/s 4.1
3.8
Thermal Shock Resistance, points 11
16

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.020
Chromium (Cr), % 18 to 20
19.5 to 20.5
Copper (Cu), % 0
0.5 to 1.0
Iron (Fe), % 64.2 to 73
51 to 56.3
Manganese (Mn), % 0 to 2.0
0 to 1.0
Molybdenum (Mo), % 0
6.0 to 7.0
Nickel (Ni), % 9.0 to 12
17.5 to 18.5
Nitrogen (N), % 0 to 0.2
0.18 to 0.25
Phosphorus (P), % 0 to 0.035
0 to 0.030
Silicon (Si), % 0 to 1.5
0 to 0.7
Sulfur (S), % 0 to 0.025
0 to 0.010