EN 1.4404 is an austenitic stainless steel containing molybdenum intended to provide better corrosion resistance than standard Cr-Ni steel. The addition of molybdenum provides enhanced resistance to pitting and crevice corrosion in environments containing chlorides or other halides.
It is not magnetic in the annealed state but may become somewhat magnetic as a result of cold working or welding.
Austenitic stainless steels (1.4404) are susceptible to intergranular corrosion due to grain boundary precipitation of chromium carbides, which can occur in the temperature range 550 - 850oC.
This is not a common problem for modern stainless steels - 1.4404, as the carbon content is generally kept at a low level. Steels with low carbon content (0.02%) have good resistance to intergranular corrosion. Resistance to pitting and crevice corrosion can be increased by increasing the chromium content. Molybdenum and nitrogen. These grades have significantly better resistance to this type of local corrosion than standard Cr-Ni grades.
EN 1.4404 grade and standard Cr-Ni steels are susceptible to stress corrosion cracking. Critical service conditions, i. to. Applications exposed to combinations of tensile stresses, temperatures above about 50oC and chloride containing solutions should be avoided.
Other norms and standards:
EN 10088-3
EN 10028-7
EN 10272
ASTM A 276 / ASME SA 276
ASTM A 479 / ASME SA-479
X2CrNiMo17-12-2
316L
The main application areas of 1.4404 stainless steel are the chemical and textile industry, and desalination of seawater.
Electrical Properties
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Electrical Resistance
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0.75 ohm-m2
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Hardness HB
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Max 215
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Magnetic susceptibility
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Non magnetic
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Process Properties
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Machinability
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good
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Hot Forming
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low
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Cold Forming
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medium
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Thermal Recovery
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Softening Annealing
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1050-1100 ℃
30 min
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Specific Thermal Capacity W / m.K
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15
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Weldability
1.4404 stainless steels can be easily welded using a wide variety of conventional welding methods.
Hardening
These grades cannot be hardened by heat treatment. However, they can be hardened by cold working.
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Dimensions mm |
| X2CrNiMo17-12-2 |
6mm |
up tp |
80mm |