Heat Treated Steel Bar And Tube
HEAT TREATED STEEL BAR AND TUBE
Heat treated steel bar is produced by heating and cooling in different temperature based on the steel grades to improve the steel bar mechanical properties or machinability for various industrial applications. Heat treated steel bar includes annealed steel bars, Normalized Steel Bar, quenched and temper qt steel bar.
Annealed Steel Bar has better ductility and lower hardness, which can be easier to be machined. The annealing processing is usually widely used for steel grade with higher carbon content above 0.5%. However, some low carbon steel also requires to do annealing for special usage such as 20CrMnTi gear steel. For some special material such as 20CrMnTi gear steel and GCr15 such bearing steel, spheroidizing annealing is often required.
Normalized steel bar sometime is also one kind of annealing processing. It mainly changes the grain to remove the impurities in steel and improves the strength and hardness. For some hot rolled steel bars, to keep the basic mechanical properties, normalizing is often used.
Quenching and Tempering, abbreviated as Q&T is a king of processing that strengthen or harden steel bars by heating the materials and then cooling in water, oil or other liquid medium, that rapidly the change from austenite to perlite to get the proper properties for various usage. The quenched & tempered steel bar materials are usually with carbon from 0.30% - 0.60%, it is widely used as merchant bars in components of various machines.
Our advantages on producing heat treated steel bars:
1) Big stocks of hot rolled round bars or wire rods as raw materials
2) Wide range of Cold Drawn Steel Bar sizes: from 10mm to 150mm
3) Different cold drawing medias powder or oil to get different surface
4) Straightening machines to get better straightness up to 0.5mm/m
5) Grinding and polishing machines to get better roughness upto 0.4um
6) Heat treating furnaces to adjust the mechanical properties
7) Full sets of testing equipment to test the sizes, mechanical properties and microstructure.
8) Multiple packages to avoid broken packages and anti-rusty
4140 steel tube,Round Steel Tubing,Heat Treated Steel Tube,Heat Treated Steel Bar And Tube,S355JR steel tube SHANDONG LE REN SPECIAL STEEL CO., LTD. , https://www.sdbrightsteelbar.com
· Shenlong Automobile recalled 141 Citroen C4 Picasso
Recently, Shenlong Automobile Co., Ltd. filed a recall plan to recall some imported Citroen C4 Picasso series cars from January 18, 2017 to April 6, 2017, starting from May 31, 2018. According to the company's statistics, there are 141 vehicles in mainland China.
Some vehicles in this recall range may not be able to adhere to the inner and outer plates of the hood due to the position and width of the glass glue on the inner and outer plates of the engine hood, which may cause the hood to shake and deform. In extreme cases, the inner and outer plates of the hood may be degummed and the outer cover of the hood may fall off, posing a safety hazard. Shenlong Automobile Co., Ltd. will carry out free maintenance for the vehicles within the scope of the recall. In accordance with the specifications, glass glue will be added between the inner and outer panels of the hood to eliminate potential safety hazards.
Shenlong Automobile Co., Ltd. will notify the relevant owner by registered mail, telephone, etc. Users can log on to Shenlong Automobile Co., Ltd. website () or call Citroé¾™n customer service hotline 400-886-6688 (mobile or landline) to get the details of this recall. Users can also visit the Defence Product Management Center of the State Administration of Markets () and the WeChat Public Account (SAMRDPAC) for more information. In addition, you can call the National Product Supervision and Administration Administration's Defective Product Management Center hotline to reflect problems in the implementation of the recall or to submit defects.