Home > Products >Hot Rolled Steel Coil (HR) 
Brief of Product
Hot rolled steel coil are made from slab. Hot rolled steel coil is rolling steel slab after heating to about 1200℃. Hot Rolled steel coil has black surface due to oxidation and the thickness and width of head and tail varies quite a lot. Hot rolled steel coil is the primary formed steel while pickling, cold rolled, surface treatment and color coating are the subsequent processes.
Product Features
Wide range of applications: Is the raw material for cold rolled products, can produce structural steel ,welding structure steel (bridge, ship, automobile), steel pipe, high pressure vessel, hot-rolled speciality steel (carbon steel, alloy steel and tool steel), corrosion resiting steel (added with special element). Also can be used for automobile body and stamping parts, parts and components of automobile and motorcycle, home appliance, iron drum, pipe making.
Quality Categorization, Specifications, Characteristics and Application of Hot Rolled Products
| Quality Categorization | Characteristics and Applications | Specifications |
| Commercial Quality (CQ) | Suitable for ordinary forming, bending, welding, such as pipe, wiring piping and other parts, cover plate and truss that has no strength requirements. |
JIS G3131 SPHC SAE 1008 ~ 1023 CQ |
| Drawing Quality(DQ) | Suitable for stamping or forming processing, such as bicycle ball race, handle and 5-way pipe and bottom bracket shell etc. | JIS G3131 SPHD JSH 2700 270E SAE 1006 ~ 1008 DQ |
| Structural Quality(SQ) | Suitable for simple processing, welding and riveting assembly and with mechanical property, such as ship’s hull, bridge, scaffolding. | SS400、SS490 SM400、SAPH400 SAPH440、SPFH590、 CSC HM690T、JSH780R |
| Automobile Structural Quality(ASQ) | Suitable for manufacturing auto parts and the quality and processing requirement are very strict and normally used in car wheel rim, suspension system, chassis beam and brake back plate, etc. | JIS G3113 SAPH310、SAPH370、SAPH440、SPFH590、CSC HM 690T、JSH780R |
| Corrosion Resistance Steel Quality (CRSQ) | Normally the steel is added with chromium, phosphorus and they help to form protective oxide film on surface of steel to prevent further rusting. It is normally used in cargo container, rail car, bridge, etc. | JIS G3125 SPA-H、CSC ACR-TEN A、ACR-TEN AF |
| Pressure Vessel Quality(PVQ) | The steel requires strength, welding and processing ability. The steel has strict quality requirements and some of them needs also low temperature ductility. It is generally used in gas cylinder and other pressure vessel. | JIS G3115 SG255、SG295 ASTM A5 16 GR60、70 |
| Line Pipe Steel (LPS) | In addition to tensile strength, the steel needs also good low temperature ductility and welding ability and suitable processing ability；strict quality requirement and it is generally used in gas cylinder and other pressure vessel. | API 5LB、API X42、X52、X60 JIS G3132 SPHT1、SPHT2、 SPHT3、SPHT4 |
| Machinery Structural Quality (MSQ) | After processing into parts with this type of steel, they shall be annealed, tempered or quenched to change the basic product characteristics to increase the hardness and tensile strength of work pieces. They usually used in gardening tool, chain piece, tensioner, wrapping device, etc. | JIS S35C、S45C、S50C、 SCM415 ~ SCM435、 SAE 4130、1552 |
| Re-Rolling Quality (RRQ) | This type of steel can be set according to the quality requirements of finished products and the process capability of customer.The products include cold roll steel sheet, galvanized steel sheet and color steel sheets, etc. | SAE1006RRQ~SAE1022RRQ |
