Q345D, low alloy high strength steel. It can be used as various components and components in buildings. In reinforced concrete, it can make up for the low tensile, flexural, shear and crack resistance of concrete. Good plasticity and toughness. Construction steel can withstand large plastic deformation at room temperature, and can carry out cold bending, cold drawing, cold drawing, cold rolling, cold stamping and other cold processing. Steel has high toughness and can withstand impact; It can be welded or riveted to facilitate assembly; Capable of cutting, hot rolling and forging; The properties of steel can be changed or controlled to a considerable extent by heat treatment. Disadvantages: the main disadvantages of building steel are easy to rust, poor fire resistance, high maintenance cost, high energy consumption and cost.

Product Description:

Chemical Composition:

Physical properties :

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.