Q345 steel coil is a low-alloy high-strength structural steel material, Q represents the yield strength of this steel, and the latter 345 represents the yield value, and it will increase with the thickness of Q345 hot rolled carbon steel coil. Its yield v
| Q345 carbon steel | GB | ASTM | DIN | JIS | NF EN | BS EN | ISO |
| Q345A | Gr.50 Gr.B Gr.C Gr.D Gr.A A808M | E335 | SPFC590 | E335 | E335 | HS355CC E355CC | |
| Q345B | Gr.50 Gr.B Gr.C Gr.D Gr.A A808M | S335JR | SPFC590 | E335JR | E335JR | E355CC | |
| Q345C | Gr.C Gr.D TyPe7 Gr.A A808M Gr.50 | S355JO | SPFC590 | S335JO | S335JO | E355DD | |
| Q345D | TyPe7 Gr.50 | S355J2G3 S355J2G4 S355K2G3 S355K2G4 | SPFC590 | S355J2G3 S355J2G4 S355K2G3 S355K2G4 | S355J2G3 S355J2G4 S355K2G3 S355K2G4 | E355DD | |
| Q345E | TyPe7 Gr.50 | S355NL S355ML | SPFC590 | S355NL S355ML | S355NL S355ML | E355E E355DD |
Chemical properties
Grade and chemical composition of Q345 carbon steel (smelting analysis)：
| Q345 | quality level | C | Si | Mn | P | S | Nb | V | Ti | Cr | Ni | Cu | N | Mo | B | Als |
| A | ≤0.20 | ≤0.50 | ≤1.70 | ≤0.035 | ≤0.035 | ≤0.07 | ≤0.15 | ≤0.20 | ≤0.30 | ≤0.50 | ≤0.30 | ≤0.012 | ≤0.10 | - | - | |
| B | ≤0.035 | ≤0.035 | ||||||||||||||
| C | ≤0.030 | ≤0.030 | ≥0.07 | |||||||||||||
| D | ≤0.18 | ≤0.030 | ≤0.025 | |||||||||||||
| E | ≤0.025 | ≤0.020 |
Carbon equivalent of Q345 carbon steel delivered in hot-rolled and controlled-rolled state :
| Q345 carbon steel | Carbon Equivalent(CEV)/% | ||
Nominal Thickness or Diameter ≤63mm | Nominal Thickness or Diameter ＞63mm~250mm | Nominal Thickness ＞250mm | |
| ≤0.44 | ≤0.47 | ≤0.47 | |
Carbon equivalent of Q345 hot rolled carbon steel coil delivered in normalized, normalized rolled, normalized plus tempered state :
| Q345 hot rolled carbon steel coil | Carbon Equivalent(CEV)/% | ||
Nominal Thickness ≤63mm | Nominal Thickness ＞63mm~120mm | Nominal Thickness ＞120mm~250mm | |
| ≤0.45 | ≤0.48 | ≤0.48 | |
The carbon equivalent of Q345 steel coil delivered in the state of thermomechanical rolling (TMCP) or thermomechanical rolling plus tempering :
| Q345 steel coil | Carbon Equivalent(CEV)/% | ||
Nominal Thickness ≤63mm | Nominal Thickness ＞63mm~120mm | Nominal Thickness ＞120mm~150mm | |
| ≤0.44 | ≤0.45 | ≤0.45 | |
Pcm value of Q345 carbon steel delivered in the state of thermomechanical rolling (TMCP) or thermomechanical rolling plus tempering :
| Q345 carbon steel | Pcm/% |
| ≤0.20 |
Mechancal properties:
| Q345 Carbon Steel | Quality Level | Yield strength at the following nominal thickness (diameter, side length)(ReL)/MPa | ||||||||
| ≤16mm | ＞16mm ~ 40mm | ＞40mm ~ 63mm | ＞63mm ~ 80mm | ＞80mm ~ 100mm | ＞100mm ~ 150mm | ＞150mm ~ 200mm | ＞200mm ~ 250mm | ＞250mm ~ 400mm | ||
| A | ≥345 | ≥335 | ≥325 | ≥315 | ≥305 | ≥285 | ≥275 | ≥265 | - | |
| B | ||||||||||
| C | ||||||||||
| D | ≥265 | |||||||||
| E | ||||||||||
| Q345 Steel Coil | Quality Level | Tensile strength at the following nominal thickness (diameter, side length)(Rm)/MPa | ||||||
| ≤40mm | ＞40mm ~ 63mm | ＞63mm ~ 80mm | ＞80mm ~ 100mm | ＞100mm ~ 150mm | ＞150mm ~ 250mm | ＞250mm ~ 400mm | ||
| A | 470~630 | 470~630 | 470~630 | 470~630 | 450~600 | 450~600 | - | |
| B | ||||||||
| C | ||||||||
| D | 450~600 | |||||||
| E | ||||||||
| Q345 Hot Rolled Carbon Steel Coil | Quality Level | Elongation after break (A)/% | |||||
| ≤40mm | ＞40mm ~ 63mm | ＞63mm ~ 100mm | ＞100mm ~ 150mm | ＞150mm ~ 250mm | ＞250mm ~ 400mm | ||
| A | ≥20 | ≥19 | ≥19 | ≥18 | ≥17 | - | |
| B | |||||||
| C | ≥21 | ≥20 | ≥20 | ≥19 | ≥18 | ||
| D | ≥17 | ||||||
| E | |||||||
| Q345 Carbon Steel | Quality Level | Test temperature/℃ | Impact absorption energy (KV2)a*/J Nominal thickness (diameter, side length) | ||
| 12mm~150mm | ＞150mm~250mm | ＞250mm~400mm | |||
| B | 20 | ≥34 | ≥27 | - | |
| C | 0 | ||||
| D | -20 | 27 | |||
| E | -40 | ||||
| a The impact test takes a longitudinal sample. | |||||
| Q345 Steel Coil | Specimen Direction | 180°bending test [d=centroid diameter, α=sample thickness (diameter)] | |
| Flat material with a width of not less than 600mm, transverse specimen for tensile test. For flat materials, profiles and bars with a width less than 600mm, longitudinal samples shall be taken. | Steel thickness (diameter, side length) | ||
| ≤16mm | ＞16mm~100mm | ||
| 2α | 3α | ||
Q345 steel coil is a low-alloy high-strength structural steel material, Q represents the yield strength of this steel, and the latter 345 represents the yield value, and it will increase with the thickness of Q345 hot rolled carbon steel coil. Its yield value decreases.
Q345 carbon steel has good comprehensive mechanical properties such as low temperature performance, plasticity and weldability, and can be used for various structural parts in cold environments below -40 °C.
Q345 hot rolled carbon steel coils are widely used in construction, bridges, vehicles, ships, pressure vessels and other industries.
In the state of hot rolling or normalizing, Q345 steel coils are mainly used to manufacture low and medium pressure vessels, oil tanks, cranes, mining machinery, power stations, bridges and other dynamic load-bearing structures, mechanical parts, building structures, and general metal structural parts.
| Product name | Q345 Hot Rolled Carbon Steel Coil |
| Standard | GB , ASTM , DIN , JIS , NF EN , BS EN , ISO |
| Thickness | Hot Rolled : 4-100mm |
| Width | 500-3000mm |
| Weight | 4-5tons/roll (Or as custom) |
| Certification | ISO9001, SGS, BV,CE |
| Trade Terms | EXW,FOB,CIF CFR |
| Loading Port | TIANJIN,SHANGHAI,DALIAN QINGDAO,etc |
| Payment terms | 1) 30% deposit by T/T, the balance against copy of B/L by T/T. |
| 2) 30% deposit by T/T, the balance by L/C at sight. | |
| 3) 100% L/C at sight. | |
| Packing Detail | Standard export package:Wooden pallet+paperboard+steel strip Customized requirements are accepted |
| Delivery time | Usually 7-15 days, or upon negotiation |
| Samples | Free samples are provided but the fright is borne by the buyer |
| *If you do not find what you are
looking for, please call us now. If you have found it, we are happy to
answer any questions or concerns you may have about stainless steel
grades and assist you through the purchasing process. | |
Q:Can you send samples?
A:Sample can be for free,freight cost collect.
Q:What product information do I need to provide?
A:Steel grade/thickness/width/quantity,these will decide the price.
Q:About product prices?
A:Prices vary from period to period due to cyclical changes in the price of raw materials.
Q:What are the certifications for your products?
A:We have ISO 9001,CE,SGS,BV and other certifications.
Q:How about the delivery time?
A:Regularly the delivery time around 10-15 days,customized one will inform the delivery time ahead.
Q:Does the product have quality inspection before loading?
A:All the products are strictly tested before packaging,also can inspect by third party inspection.
Q:How to pack the products?
A:Standard export package with waterproof film and wooden pallet.It can effectively protect products from corrosion.
