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EN 1.4945 Stainless Steel vs. AISI 309H Stainless Steel

Both EN 1.4945 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 (2, in this case) are not shown.

For each property being compared, the top bar is EN 1.4945 stainless steel and the bottom bar is AISI 309H stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200 to 220
190
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 19 to 34
40
Fatigue Strength, MPa 230 to 350
200
Poisson's Ratio 0.28
0.27
Shear Modulus, GPa 77
78
Shear Strength, MPa 430 to 460
400
Tensile Strength: Ultimate (UTS), MPa 640 to 740
580
Tensile Strength: Yield (Proof), MPa 290 to 550
230

Thermal Properties

Latent Heat of Fusion, J/g 290
290
Maximum Temperature: Corrosion, °C 520
440
Maximum Temperature: Mechanical, °C 920
1080
Melting Completion (Liquidus), °C 1490
1420
Melting Onset (Solidus), °C 1440
1370
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 14
15
Thermal Expansion, µm/m-K 17
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 3.2
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 30
19
Density, g/cm3 8.1
7.8
Embodied Carbon, kg CO2/kg material 5.0
3.6
Embodied Energy, MJ/kg 73
51
Embodied Water, L/kg 150
170

Common Calculations

PREN (Pitting Resistance) 23
23
Resilience: Ultimate (Unit Rupture Work), MJ/m3 130 to 180
190
Resilience: Unit (Modulus of Resilience), kJ/m3 210 to 760
130
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 22 to 25
21
Strength to Weight: Bending, points 20 to 22
20
Thermal Diffusivity, mm2/s 3.7
4.0
Thermal Shock Resistance, points 14 to 16
13

Alloy Composition

Carbon (C), % 0.040 to 0.1
0.040 to 0.1
Chromium (Cr), % 15.5 to 17.5
22 to 24
Iron (Fe), % 57.9 to 65.7
58.1 to 66
Manganese (Mn), % 0 to 1.5
0 to 2.0
Nickel (Ni), % 15.5 to 17.5
12 to 15
Niobium (Nb), % 0.4 to 1.2
0
Nitrogen (N), % 0.060 to 0.14
0
Phosphorus (P), % 0 to 0.035
0 to 0.045
Silicon (Si), % 0.3 to 0.6
0 to 0.75
Sulfur (S), % 0 to 0.015
0 to 0.030
Tungsten (W), % 2.5 to 3.5
0