Sheet, strip 1.4438 - aisi 317L
|Mark||Analogue||W. Nr.||Aisi Uns||En||Order|
|03Х19Н13М3||1.4438||317L||X218-5-4||Delivery from the stock, in stock|
|~1.4438||~317L||X2CrNiMo18-15-4||Delivery from the stock, in stock|
Chemical composition and characteristics
Sheet and strip, in stainless steel AISI 317L, depending on the country of manufacture may have a slightly different composition, which, in addition to chemically pure iron, required the presence of at least 18…19% chromium, not less than 11 to 12% Nickel, and up to 4…5% molybdenum. The alloy is characterized by an extremely low percentage of carbon, which does not exceed 0,035%.
Separate state standards of leading world manufacturers reglementary the content of alloying elements of the alloy within such limits:
|USA||AISI||0.03||Not below 24||22||0,75…1,0|
Rolled sheet alloy is considered:
- Extremely high corrosion resistance, particularly in severe operating conditions.
- High mechanical strength at high loads with a predominance of tensile stresses.
- The presence of finely dispersed chromium carbides formed during smelting that minimizes the possibility of subsequent corrosion damage and destruction.
- The durability of the parts that can not change their size during sudden temperature fluctuations.
The scope and workability
Sheet and strip from alloy (1.4438) AISI 317L is used:
- In toliociai devices and the scrubber systems of metallurgical units;
- For the manufacture of operating equipment for chemical and petrochemical plants;
- In the food industry;
- For details of the aggregates used for the production of paper products;
- In the machines of textile production;
- In the pharmaceutical industry.
Alloy successfully resists corrosion phenomena, which are caused by constant exposure to aggressive environments that contain nitrides, sulphides and acids — sulfuric, formic, citric, etc. Intergranular corrosion (due to the extremely low carbon content). Steel also has good weldability, and the welding exhibits weak magnetic properties.
In this paper we atmosphere, the steel retains its high level of corrosion parameters to temperatures of 870…9000 C. After melting and rolling alloy has relatively low hardness not exceeding HRC 95. However, during the deformation, as well as high-speed machining, the material is prone to hardening.