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EN 1.4640 Stainless Steel vs. AISI 202 Stainless Steel

Both EN 1.4640 stainless steel and AISI 202 stainless steel are iron alloys. They have a moderately high 94% 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 202 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190 to 200
210 to 300
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 51
14 to 45
Fatigue Strength, MPa 230 to 250
290 to 330
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
77
Shear Strength, MPa 440 to 460
490 to 590
Tensile Strength: Ultimate (UTS), MPa 620 to 650
700 to 980
Tensile Strength: Yield (Proof), MPa 240 to 260
310 to 580

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
1400
Melting Onset (Solidus), °C 1380
1360
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 15
15
Thermal Expansion, µm/m-K 16
17

Electrical Properties

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

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
40
Embodied Water, L/kg 150
150

Common Calculations

PREN (Pitting Resistance) 20
20
Resilience: Ultimate (Unit Rupture Work), MJ/m3 250 to 260
120 to 260
Resilience: Unit (Modulus of Resilience), kJ/m3 150 to 170
250 to 840
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 22 to 23
25 to 35
Strength to Weight: Bending, points 21
23 to 29
Thermal Diffusivity, mm2/s 4.0
4.0
Thermal Shock Resistance, points 14 to 15
15 to 21

Alloy Composition

Carbon (C), % 0.030 to 0.080
0 to 0.15
Chromium (Cr), % 18 to 19
17 to 19
Copper (Cu), % 1.3 to 2.0
0
Iron (Fe), % 67.4 to 73.6
63.5 to 71.5
Manganese (Mn), % 1.5 to 4.0
7.5 to 10
Nickel (Ni), % 5.5 to 6.9
4.0 to 6.0
Nitrogen (N), % 0.030 to 0.11
0 to 0.25
Phosphorus (P), % 0 to 0.045
0 to 0.060
Silicon (Si), % 0 to 0.5
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.030