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EN 1.4511 Stainless Steel vs. EN 1.4640 Stainless Steel

Both EN 1.4511 stainless steel and EN 1.4640 stainless steel are iron alloys. They have 88% of their average alloy composition in common.

For each property being compared, the top bar is EN 1.4511 stainless steel and the bottom bar is EN 1.4640 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180
190 to 200
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 25
51
Fatigue Strength, MPa 180
230 to 250
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
77
Shear Strength, MPa 330
440 to 460
Tensile Strength: Ultimate (UTS), MPa 510
620 to 650
Tensile Strength: Yield (Proof), MPa 260
240 to 260

Thermal Properties

Latent Heat of Fusion, J/g 280
280
Maximum Temperature: Corrosion, °C 480
420
Maximum Temperature: Mechanical, °C 870
930
Melting Completion (Liquidus), °C 1440
1420
Melting Onset (Solidus), °C 1400
1380
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 25
15
Thermal Expansion, µm/m-K 10
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 11
14
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.5
2.8
Embodied Energy, MJ/kg 37
40
Embodied Water, L/kg 120
150

Common Calculations

PREN (Pitting Resistance) 17
20
Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
250 to 260
Resilience: Unit (Modulus of Resilience), kJ/m3 170
150 to 170
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 18
22 to 23
Strength to Weight: Bending, points 18
21
Thermal Diffusivity, mm2/s 6.7
4.0
Thermal Shock Resistance, points 19
14 to 15

Alloy Composition

Carbon (C), % 0 to 0.050
0.030 to 0.080
Chromium (Cr), % 16 to 18
18 to 19
Copper (Cu), % 0
1.3 to 2.0
Iron (Fe), % 78.9 to 84
67.4 to 73.6
Manganese (Mn), % 0 to 1.0
1.5 to 4.0
Nickel (Ni), % 0
5.5 to 6.9
Niobium (Nb), % 0 to 1.0
0
Nitrogen (N), % 0
0.030 to 0.11
Phosphorus (P), % 0 to 0.040
0 to 0.045
Silicon (Si), % 0 to 1.0
0 to 0.5
Sulfur (S), % 0 to 0.015
0 to 0.015