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EN 1.4640 Stainless Steel vs. AISI 317 Stainless Steel

Both EN 1.4640 stainless steel and AISI 317 stainless steel are iron alloys. They have 89% of their average alloy composition in common.

For each property being compared, the top bar is EN 1.4640 stainless steel and the bottom bar is AISI 317 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190 to 200
170 to 220
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 51
35 to 55
Fatigue Strength, MPa 230 to 250
250 to 330
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
79
Shear Strength, MPa 440 to 460
420 to 470
Tensile Strength: Ultimate (UTS), MPa 620 to 650
580 to 710
Tensile Strength: Yield (Proof), MPa 240 to 260
250 to 420

Thermal Properties

Latent Heat of Fusion, J/g 280
290
Maximum Temperature: Corrosion, °C 420
420
Maximum Temperature: Mechanical, °C 930
590
Melting Completion (Liquidus), °C 1420
1400
Melting Onset (Solidus), °C 1380
1380
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 15
15
Thermal Expansion, µm/m-K 16
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
2.3
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
2.6

Otherwise Unclassified Properties

Base Metal Price, % relative 14
21
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 2.8
4.3
Embodied Energy, MJ/kg 40
59
Embodied Water, L/kg 150
160

Common Calculations

PREN (Pitting Resistance) 20
31
Resilience: Ultimate (Unit Rupture Work), MJ/m3 250 to 260
210 to 260
Resilience: Unit (Modulus of Resilience), kJ/m3 150 to 170
150 to 430
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 22 to 23
20 to 25
Strength to Weight: Bending, points 21
20 to 22
Thermal Diffusivity, mm2/s 4.0
4.1
Thermal Shock Resistance, points 14 to 15
12 to 15

Alloy Composition

Carbon (C), % 0.030 to 0.080
0 to 0.080
Chromium (Cr), % 18 to 19
18 to 20
Copper (Cu), % 1.3 to 2.0
0
Iron (Fe), % 67.4 to 73.6
58 to 68
Manganese (Mn), % 1.5 to 4.0
0 to 2.0
Molybdenum (Mo), % 0
3.0 to 4.0
Nickel (Ni), % 5.5 to 6.9
11 to 15
Nitrogen (N), % 0.030 to 0.11
0 to 0.1
Phosphorus (P), % 0 to 0.045
0 to 0.045
Silicon (Si), % 0 to 0.5
0 to 0.75
Sulfur (S), % 0 to 0.015
0 to 0.030

Comparable Variants