Complaint
Rolling is divided into cold-rolled and hot-rolled steel sheets, and the recrystallization temperature is the distinguishing point. The hot-rolled sheet has poor toughness and surface smoothness, and the price is low, while the cold-rolled sheet has good stretchability and toughness, but the price is more expensive. The cold-rolled sheet is cold-rolled, and the surface has no oxide skin and is of good quality. The hot-rolled sheet is processed by hot rolling, and the surface has an oxide scale, and the thickness of the sheet is poor.
Continuous casting slabs or primary rolling slabs are used as raw materials, heated by a stepping furnace, and dephosphorized by high-pressure water, and then enter the roughing mill. The rough rolling material is cut through the head, tail, and then into the finishing mill, and computer-controlled rolling is carried out. After the final rolling, it will go through laminar cooling (computer-controlled cooling rate) and take-up by the coiler to become a straight hair coil. The head and tail of straight hair curls tend to be tongue-shaped and fish-tailed, with poor thickness and width accuracy, and often have wavy, folded, tower-shaped and other defects on the edges. The coil is heavier and the inner diameter of the steel coil is 760mm. (Generally used in the pipe-making industry.) After straightening the hair through the cutting head, tail cutting, trimming and multi-pass straightening and smoothing finishing lines, and then cutting or re-rolling, it becomes: hot rolling Steel plates, flat hot rolled steel coils, slitting tapes and other products. If the hot-rolled finishing coil is pickled to remove scale and coated with oil, it will become a hot-rolled pickled coil.
Cold rolled steel is low-carbon hot-rolled steel that has been cleaned of oxide scale and then finished in a specific series of rolling to just over the desired thickness, heating to controlled temperatures, and final rolling to the desired thickness. This produces steel with close dimensional tolerances and a wide range of controlled surface finishes. Use cold rolled steel coils where thickness tolerances and surface condition are important for light gauge applications.
| Main grade | St37,St52,SS400,A36,Q235B,Q345A,Q345B,A516GR60,A516GR70,AH32,AH36,SS400Cr, SM400A,SM400B,SPCC,SGCC,DC01,DC03,DC04 |
Standard | ASTM A20/A20M,A36/A36M JIS G3115 DIN 17100 EN 10028 GB |
| Surface | Clean, blasting and painting ,Decorative pattern into tear, diamond, round bean shaped, mixed oval shape or as client requirement. |
| Thickness | 0.12-12mm |
| Width | 500-2200mm |
| Tolerance | Thickness: +/-0.02mm, Width:+/-2mm |
Other Common Size | 1219*2438; 1220*2440; 1500*3000; 1500*6000; 2438*6096; 2438*9143 Can be customized, cut, or processed according to customers' requirements |
| Package | tied up with steel strips and wrapped with water proof paper |
| Weight Calculation | Weight(kg)=Thickness(mm)*Width(m)*Length(m)*Density(7.85g/cm3) |
Application | Building Construction Bridge Architecture Vehicles Components Hipping High pressure container Boiler Shipping building Food and Mechanical Industries Large Structure steel etc. |
Standard | Grade | General Size | Delivery Condition |
ASTM A36 | A36/A36-B | 5-20 * 2300-2500 * C | Boron added or Black Condition |
ASTM A283 | A283-B/A283C | 5-20 * 2300-2500 * C | Boron added or Black Condition |
ASTM A572 | A572Gr50-B/A572Gr42-B | 5-20 * 2300-2500 * C | Boron added or Black Condition |
ASTM A515 | A515Gr70 | 5-20 * 2300-2500 * C | Boron added or Black Condition |
ASTM A516 | A516Gr70 | 5-20 * 2300-2500 * C | Boron added or Black Condition |
JIS G 3101 | SS400-B | 5-20 * 2300-2500 * C | Boron added or Black Condition |
JIS G3136 | SN400B | 5-20 * 2300-2500 * C | Boron added or Black Condition |
EN10025-2:2004 | S235JR-S355K2+N | 5-20 * 2300-2500 * C | Boron added or Black Condition |
EN10025-5:2004 | S355J2W/S355K2W | 5-20 * 2300-2500 * C | Boron added or Black Condition |
| Grade | Rank | Chemical Composition( %) | ||||
| C | Mn | Si | S | P | ||
| Q195 | 0.06~0.12 | 0.25~0.50 | ≤0.3 | ≤0.05 | ≤0.045 | |
| Q215 | A | 0.09~0.15 | 0.25~0.55 | ≤0.3 | ≤0.05 | ≤0.045 |
| B | ≤0.045 | |||||
| Q235 | A | 0.14~0.22 | 0.30~0.65 | ≤0.3 | ≤0.05 | ≤0.045 |
| B | 0.12~0.20 | 0.30~0.70 | ≤0.045 | |||
| C | ≤0.18 | 0.35~0.80 | ----- | ≤0.04 | ≤0.04 | |
| D | ≤0.17 | ≤0.035 | ≤0.035 | |||
| Q255 | A | 0.18~0.28 | 0.40~0.70 | ≤0.3 | ≤0.05 | ≤0.045 |
| B | ≤0.045 | ----- | ||||
| Q275 | 0.28~0.38 | 0.50~0.80 | ≤0.35 | ≤0.05 | ≤0.045 | |
| Grade | C | Si | Mn | P | S | Cr |
| A36Cr | 0.12%~0.20% | ≤0.30% | 0.30%~0.70% | ≤0.045% | ≤0.045% | ≤0.30% |
| SS400Cr | 0.12%~0.20% | ≤0.30% | 0.30%~0.70% | ≤0.045% | ≤0.045% | ≤0.30% |
| Q235B | 0.12%~0.20% | ≤0.30% | 0.30%~0.70% | ≤0.045% | ≤0.045% | ≤0.30% |
| Q345B | ≤0.20% | ≤0.50% | ≤1.70% | ≤0.035% | ≤0.035% | ≤0.30% |
We provide one-stop trading services, including: design, quotation, inspection,packaging, delivery and installation to meet customer needs. We have many excellent experienced personnel. Our technical team combines advanced technology to provide sketch design and efficient project solutions. Our international sales staff can use professional knowledge to solve your problems. Our customers will always be respected because we meet all aspects of your personal needs.The company has always insisted on striving for survival by quality,continuously innovating in management and technology,and has established a sound scientific management and quality assurance system.
After 10 years of development and customer support, our carbon steel production capacity is from 500 tons/month to 10000 tons/month. Currently, we have 6 carbon steel production lines. Our professional engineers and well-trained workshop workers help our sales team complete every order ahead of schedule.
Q1:Can you send samples?
A:Of course, we can provide customers with free samples and express shipping service to all over of the world.
Q2:What product information do I need to provide?
A:Please kindly provide the grade, width, thickness, surface treatment requirement should you have and quantities you need to purchase.
Q3:It's my first time to import steel products, can you help me with it?
A:Sure,we have agent to arrange the shipment, we will do it together with you.
Q4:What ports of shipment are there?
A:Under normal circumstances, we ship from Shanghai, Tianjin, Qingdao, Ningbo ports, you can specify other ports according to your needs.
Q5:What about product prices information?
A:Prices various according to periodic price changes of raw materials.
Q6:What is your terms of payment ?
A:Payment<=1000USD, 100% in advance. Payment>=1000USD, 30% T/T in advance ,balance before shipment or based on BL copy or LC at sight.
Q7:Do you provide custom made Products service?
A: Yes,if you have your own design , we can produce according to your specification and drawing.
Q8:What are the certifications for your products?
A:We have ISO 9001, MTC, third parties' inspections are all available such SGS, BV ect.
Q9:How long does your delivery time take?
A:In general, our delivery time is within 7-15 days, and may be longer if the quantity is extremely large or special circumstances occur.
Q10: How many countries you already exported to?
A:We have exported to America, Canada, Brazil, Chile, Colombia, Russia, Ukraine, Thailand, Myanmar, Vietnam, India, Kenya, Ghana,somalia and other African countries.Our export experience is rich, we familiar with different market demands, can help customers avoid a lot of trouble.
Q11:Can I go to your factory to visit?
A:Of course, we welcome customers from all over the world to visit our factory.
Q12:Does the product have quality inspection before loading?
A:Of course, all our products are strictly tested for quality before packaging, and unqualified products will be destroyed and customers can appoint third parties to inspect the products before loading too.
Q13:How to pack the products?
A: Standard export sea-worthy packaging, the inner layer has a waterproof paper outer layer with iron packaging and is fixed with a fumigation wooden pallet. It can effectively protect products from corrosion and various climate changes during ocean transportation.
Q14:What is your working time?
A:In general, our online service time is Beijing time: 8:00-22:00, after 22:00, we will reply to your inquiry in the coming working day.
