Steel Q345A has good strength but poor performance. It is a low alloy steel, which is widely used in bridges, vehicles, ships, buildings, pressure vessels and so on. Compared with Q345B, C, D and E steel, Q345A steel has high low temperature impact test temperature and poor performance, and the content of harmful substances P and S is higher than Q345B, C, D and E.
Product Description:
| Product Name | Steel sheets/plate |
| Size | as required |
| Width | 50mm-6000mm or as required |
| Thickness | 8mm-320mm or as required |
| Standard | GB/T1591-2008 |
| Technique | Hot rolled |
| Surface Treatment | According to customer's requirement |
| Thickness Tolerance | ±0.01mm~ ±0.25mm |
| Material | Q345A |
| Application | Bridges, vehicles, ships, buildings, pressure vessels. |
| MOQ | 1 ton , We can accept sample order. |
| Shipment Time | Within 15-20 workdays after receiving deposit or workable L/C |
| Export Packing | Waterproof paper, and steel strip packed.
Standard Export Seaworthy Package.Suit for all kinds of transport,or as required |
| Capacity | 250,000 tons/year |
Chemical Composition:
| Grade | C | Si | Mn | P | S | V | Nb | Ti | AL |
| ≤% | ≤% | ≤% | ≤% | ≤% | % | % | % | ≥% |
| Q345A | 0.20 | 0.55 | 1.70 | 0.045 | 0.045 | 0.02-0.15 | 0.015-0.060 | 0.02-0.20 | / |
| Q345B | 0.20 | 0.55 | 1.70 | 0.040 | 0.045 | 0.02-0.15 | 0.015-0.060 | 0.02-0.20 | / |
| Q345C | 0.20 | 0.55 | 1.70 | 0.035 | 0.035 | 0.02-0.15 | 0.015-0.060 | 0.02-0.20 | 0.015 |
| Q345D | 0.18 | 0.55 | 1.80 | 0.030 | 0.030 | 0.02-0.15 | 0.015-0.060 | 0.02-0.20 | 0.015 |
| Q345E | 0.18 | 0.55 | 1.80 | 0.025 | 0.025 | 0.02-0.15 | 0.015-0.060 | 0.02-0.20 | 0.015 |
Physical properties :
| Grade | Tensile strength (MPa) | Yield strength (MPa) | Elongation δ5≥(%) |
| Q345A (thickness≦16mm) | 470-630 | 345 | 21 |
| Q345B(thickness≦16mm) | 470-630 | 345 | 21 |
| Q345C(thickness16-35mm) | 470-630 | ≥325 | 22 |
| Q345D(thickness35-50mm) | 490-675 | ≥295 | 22 |
| Q345E(thickness50-100mm) | 490-675 | ≥275 | 22 |
Difference between Q235 and Q345:
Q235 is ordinary carbon steel, metal structural parts, carburized or cyanide parts with low core strength requirements, pull rods, connecting rods, hooks, couplers, bolts, nuts, sleeves, shafts and weldments.
Q345 is a low alloy steel with good comprehensive mechanical properties, low temperature performance, good plasticity and weldability. It is used as structures, mechanical parts, building structures and general metal structure components bearing dynamic load such as medium and low pressure vessels, oil tanks, vehicles, cranes, mining machinery, power stations and bridges. It can be used in hot rolling or normalizing state. It can be used for various structures in cold areas below - 40 ℃.
If the structure is controlled by strength, Q345 can be considered; if the structure is controlled by stiffness, Q235 can be considered. Q345 is a little expensive, but it can save materials because of its high strength. The specific selection can be comprehensively compared from the above points.
FAQ:
Q1. What are your company's main products ?
A1: Our main products are stainless steel plate/sheet, coil, round/square pipe, bar, channel, etc.
Q2. How do you control quality ?
A2: Mill Test Certification is supplied with shipment, Third Party Inspection is available. and we also get ISO,SGS,Alibaba Verified.
Q3. What are the advantages of your company ?
A35: We have many professionals, technical personnel, more competitive prices and best after-dales service than other stainless steel companies.
Q4: What is the terms of packing?
A3: generally, we pack our goods in bundles or coils with rods or belts, we could also pack the goods as the customers requirement.
Q5:What is your delivery time?
A4: For stocks, we could transport the goods to loading port within 7 days after we received your deposit
For production period, it usually takes about 15 days-30 days after receiving the deposit.
Q6. Can you provide sample ?
A7: We can provide the samll samples in stock for free, as long as you contact us.
Customized samples will take about 5-7days.
Q7. How many coutries you already exported ?
A6: Exported to more than 50 countries mainly from America, Russia, UK, Kuwait, Egypt, Turkey, Jordan,India, etc.
Product Tags:
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Grade Q345A Hot Rolled Carbon Steel Sheet Metal Images
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