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EN 1.4640 Stainless Steel vs. EN 1.4646 Stainless Steel

Both EN 1.4640 stainless steel and EN 1.4646 stainless steel are iron alloys. They have 90% of their average alloy composition in common. There are 29 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is EN 1.4640 stainless steel and the bottom bar is EN 1.4646 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190 to 200
220
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 51
34
Fatigue Strength, MPa 230 to 250
340
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
77
Shear Strength, MPa 440 to 460
500
Tensile Strength: Ultimate (UTS), MPa 620 to 650
750
Tensile Strength: Yield (Proof), MPa 240 to 260
430

Thermal Properties

Latent Heat of Fusion, J/g 280
290
Maximum Temperature: Corrosion, °C 420
410
Maximum Temperature: Mechanical, °C 930
910
Melting Completion (Liquidus), °C 1420
1390
Melting Onset (Solidus), °C 1380
1340
Specific Heat Capacity, J/kg-K 480
480
Thermal Expansion, µm/m-K 16
17

Otherwise Unclassified Properties

Base Metal Price, % relative 14
13
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 2.8
2.8
Embodied Energy, MJ/kg 40
41
Embodied Water, L/kg 150
160

Common Calculations

PREN (Pitting Resistance) 20
23
Resilience: Ultimate (Unit Rupture Work), MJ/m3 250 to 260
220
Resilience: Unit (Modulus of Resilience), kJ/m3 150 to 170
460
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 22 to 23
27
Strength to Weight: Bending, points 21
24
Thermal Shock Resistance, points 14 to 15
16

Alloy Composition

Carbon (C), % 0.030 to 0.080
0.020 to 0.1
Chromium (Cr), % 18 to 19
17 to 19
Copper (Cu), % 1.3 to 2.0
1.5 to 3.0
Iron (Fe), % 67.4 to 73.6
59 to 67.3
Manganese (Mn), % 1.5 to 4.0
10.5 to 12.5
Molybdenum (Mo), % 0
0 to 0.5
Nickel (Ni), % 5.5 to 6.9
3.5 to 4.5
Nitrogen (N), % 0.030 to 0.11
0.2 to 0.3
Phosphorus (P), % 0 to 0.045
0 to 0.050
Silicon (Si), % 0 to 0.5
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.015