03Х17Н14М3- 1.4404 - aisi 316L tube
|Mark||Analogue||W. Nr.||Aisi Uns||En||Order|
|03Х17Н14М3||EI844||1.4435||316L||X2CrNiMo18-4-3||Delivery from the stock, in stock|
High-alloy 03X17H14MZ alloy belongs to the austenitic class. It is used in the production of the main equipment units in the chemical synthesis of caprolactam and urea.
Physical properties at t° 20°C
- Modulus of elasticity is 19.5x10-4 N/mm2, and at 300 ° C 19x10-4 N/mm2 .
- The density is 7.75 g/cm3.
- thermal conductivity = 0.294 - 10² W (m - K).
- linear thermal expansion coefficient α - at t ° 20-200 ° C = 16.1x10-6 / C, at t ° 20-300 ° C = 14.4x10-6 / C.
- Specific electrical resistance = 0.73 Ohmxmm2 / m.
Mechanical characteristics of the alloy at 20 °C.
|Specifications and GOST||Product Type||σ0,2, N/mm²||σ in, N/mm²||δ5, %|
|GOST 5582-75||Cold-rolled sheet||200||500||40|
Mechanical characteristics at elevated and low temperature (6 mm thick sheet, quenched in water at 1100°C)
|σ0,2, N/mm²||σ in, N/mm²||
|δ5, %||σ0,2, N/mm²||σ in, N/mm²||tisp, °С||δ5, %|
Mechanical characteristics at high temperature (20 mm thick sheet, water hardened at 1100°C)
|σ0.2, N/mm²||σ in, N/mm²||
|δ5, %||n, vol||KCU, J/cm2||ψ, %|
According to the following specifications: 14-1-1154-74, 14-1-69 273, 14-1-1541-75, 14-1-240-72, 14-1-2144-77 alloy 03X17H14MZ when tested in boiling 65% nitric acid (density 1.41 g/cm3), made ofdistilled water and absolutely pure acid OSCh-1 1-3 according to
Duration of tests according to TU 14-1-2144-77 is 5 cycles of 48 hours each. The rate of corrosion of the alloy must not be more than 0.5 mm/year. This steel 03Х17Н14МЗ according to
In the manufacture of urea 03Cr17H14MZ alloy is used for lining synthesis columns and mixers, and in the manufacture of caprolactam - in the oxidation reactors cyclohexane. This alloy is used in the production of welded structures that operate in sulfuric acid environments, as well as in boiling 10% acetic and phosphoric acids.
Plastic hot deformation is carried out in the temperature range of 1150-900°C. This steel has high ductility. Hardening in water at 1080 ± 20°C is used for debinding after cold and hot plastic deformation.
Good weldability by all automatic and manual welding methods. In manual arc welding OZL-20 electrodes with 03X17H14M2 (or EP551) steel wire are used. During automatic welding in shielding gas or submerged arc welding wire of the same grade is used. The strength and corrosion resistance of welded joints in this case is not lower than the base metal. Welded seams of steel in urea synthesis medium are not susceptible to intergranular, knife corrosion and have a corrosion rate of 0.041-0.11 mm / year.
Applicable GOST for the steel 03Cr17N14M3
5582-75; "Corrosion-resistant thin sheet steel, heat-resistant and heat-resistant. TU".
25 054-81 "Forgings of corrosion-resistant alloys and steels. General specifications. Specifications".
5632-72 "Alloys of corrosion-resistant and high-alloy steels, heat-resistant heat-resistant. grades".
5949-75 "Calibrated and section steel corrosion-resistant, heat-resistant and heat-resistant. Technical Conditions". ;
5632-72 "Corrosion-resistant and high-alloy steel alloys, heat-resistant and heat-resistant. Grades".
TU 14-11-245-88. "Shaped steel profiles of high accuracy.
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