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EN 1.4449 Stainless Steel vs. AISI 309H Stainless Steel

Both EN 1.4449 stainless steel and AISI 309H stainless steel are iron alloys. They have a moderately high 93% of their average alloy composition in common. There are 33 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is EN 1.4449 stainless steel and the bottom bar is AISI 309H stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
190
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 48
40
Fatigue Strength, MPa 240
200
Poisson's Ratio 0.28
0.27
Shear Modulus, GPa 78
78
Shear Strength, MPa 440
400
Tensile Strength: Ultimate (UTS), MPa 620
580
Tensile Strength: Yield (Proof), MPa 250
230

Thermal Properties

Latent Heat of Fusion, J/g 290
290
Maximum Temperature: Corrosion, °C 410
440
Maximum Temperature: Mechanical, °C 960
1080
Melting Completion (Liquidus), °C 1440
1420
Melting Onset (Solidus), °C 1400
1370
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 15
15
Thermal Expansion, µm/m-K 16
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.3
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.6
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 19
19
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 3.9
3.6
Embodied Energy, MJ/kg 54
51
Embodied Water, L/kg 150
170

Common Calculations

PREN (Pitting Resistance) 27
23
Resilience: Ultimate (Unit Rupture Work), MJ/m3 240
190
Resilience: Unit (Modulus of Resilience), kJ/m3 160
130
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 22
21
Strength to Weight: Bending, points 20
20
Thermal Diffusivity, mm2/s 4.0
4.0
Thermal Shock Resistance, points 14
13

Alloy Composition

Carbon (C), % 0 to 0.035
0.040 to 0.1
Chromium (Cr), % 17 to 18.2
22 to 24
Copper (Cu), % 0 to 1.0
0
Iron (Fe), % 62.4 to 69.3
58.1 to 66
Manganese (Mn), % 0 to 2.0
0 to 2.0
Molybdenum (Mo), % 2.3 to 2.8
0
Nickel (Ni), % 11.5 to 12.5
12 to 15
Nitrogen (N), % 0 to 0.080
0
Phosphorus (P), % 0 to 0.045
0 to 0.045
Silicon (Si), % 0 to 1.0
0 to 0.75
Sulfur (S), % 0 to 0.015
0 to 0.030