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EN 1.4509 Stainless Steel vs. AISI 441 Stainless Steel

Both EN 1.4509 stainless steel and AISI 441 stainless steel are iron alloys. Both are furnished in the annealed condition. Their average alloy composition is basically identical. 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 1.4509 stainless steel and the bottom bar is AISI 441 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180
170
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 21
23
Fatigue Strength, MPa 170
180
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
77
Shear Strength, MPa 330
300
Tensile Strength: Ultimate (UTS), MPa 530
470
Tensile Strength: Yield (Proof), MPa 260
270

Thermal Properties

Latent Heat of Fusion, J/g 280
280
Maximum Temperature: Corrosion, °C 570
550
Maximum Temperature: Mechanical, °C 890
910
Melting Completion (Liquidus), °C 1440
1440
Melting Onset (Solidus), °C 1400
1400
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 25
23
Thermal Expansion, µm/m-K 10
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
2.7
Electrical Conductivity: Equal Weight (Specific), % IACS 3.4
3.1

Otherwise Unclassified Properties

Base Metal Price, % relative 13
13
Density, g/cm3 7.7
7.7
Embodied Carbon, kg CO2/kg material 2.8
2.8
Embodied Energy, MJ/kg 41
41
Embodied Water, L/kg 120
130

Common Calculations

PREN (Pitting Resistance) 18
19
Resilience: Ultimate (Unit Rupture Work), MJ/m3 90
92
Resilience: Unit (Modulus of Resilience), kJ/m3 180
190
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 19
17
Strength to Weight: Bending, points 19
17
Thermal Diffusivity, mm2/s 6.8
6.1
Thermal Shock Resistance, points 19
16

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.030
Chromium (Cr), % 17.5 to 18.5
17.5 to 19.5
Iron (Fe), % 77.8 to 82.1
76 to 82.2
Manganese (Mn), % 0 to 1.0
0 to 1.0
Nickel (Ni), % 0
0 to 1.0
Niobium (Nb), % 0.3 to 1.0
0.3 to 0.9
Nitrogen (N), % 0
0 to 0.030
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.030
Titanium (Ti), % 0.1 to 0.6
0.1 to 0.5