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AISI 440A Stainless Steel vs. EN 1.4959 Stainless Steel

Both AISI 440A stainless steel and EN 1.4959 stainless steel are iron alloys. They have 63% of their average alloy composition in common. There are 31 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 AISI 440A stainless steel and the bottom bar is EN 1.4959 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 5.0 to 20
40
Fatigue Strength, MPa 270 to 790
170
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
77
Shear Strength, MPa 450 to 1040
430
Tensile Strength: Ultimate (UTS), MPa 730 to 1790
630
Tensile Strength: Yield (Proof), MPa 420 to 1650
190

Thermal Properties

Latent Heat of Fusion, J/g 280
300
Maximum Temperature: Corrosion, °C 400
510
Maximum Temperature: Mechanical, °C 760
1090
Melting Completion (Liquidus), °C 1480
1400
Melting Onset (Solidus), °C 1370
1350
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 23
12
Thermal Expansion, µm/m-K 10
15

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.5
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 2.9
2.0

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
31
Density, g/cm3 7.7
8.0
Embodied Carbon, kg CO2/kg material 2.2
5.4
Embodied Energy, MJ/kg 31
76
Embodied Water, L/kg 120
200

Common Calculations

PREN (Pitting Resistance) 18
21
Resilience: Ultimate (Unit Rupture Work), MJ/m3 87 to 120
190
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 26 to 65
22
Strength to Weight: Bending, points 23 to 43
20
Thermal Diffusivity, mm2/s 6.2
3.2
Thermal Shock Resistance, points 26 to 65
15

Alloy Composition

Aluminum (Al), % 0
0.25 to 0.65
Carbon (C), % 0.6 to 0.75
0.050 to 0.1
Chromium (Cr), % 16 to 18
19 to 22
Cobalt (Co), % 0
0 to 0.5
Copper (Cu), % 0
0 to 0.5
Iron (Fe), % 78.4 to 83.4
39.4 to 50.5
Manganese (Mn), % 0 to 1.0
0 to 1.5
Molybdenum (Mo), % 0 to 0.75
0
Nickel (Ni), % 0
30 to 34
Nitrogen (N), % 0
0 to 0.030
Phosphorus (P), % 0 to 0.040
0 to 0.015
Silicon (Si), % 0 to 1.0
0 to 0.7
Sulfur (S), % 0 to 0.015
0 to 0.010
Titanium (Ti), % 0
0.25 to 0.65