Q345 ASTMGr.50 ISOE355CC JISSN400 low alloy high strength structural seamless steel pipe

Short Description:

Q345 seamless pipe belongs to low alloy series – low alloy high strength structural steel (GB / t1591-1994). Q345A, B, C, D and E are the representative grades of this kind of steel. Compared with carbon structural steel, Q345A has the advantages of high strength, good comprehensive performance, long service life, wide application range and relatively economic. It is widely used in bridges, ships, boilers, vehicles and important building structures.

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Product Description

Q345 is a kind of low-alloy steel with good comprehensive mechanical properties, low-temperature properties, good plasticity and weldability. It is used for medium and low pressure vessels, oil tanks, vehicles, cranes, mining machinery, power stations, bridges and other structures, mechanical parts, building structures and general metal structures under dynamic load. Q345A, Q345B, Q345C, Q345D, Q345E. The main reason is that the impact temperature is different. Q345A level, is not to do impact; Q345B, 20 ℃ impact at room temperature; Q345C, 0 degree impact; Q345D is - 20 degree impact; Q345E is - 40 degree impact. At different impact temperature, the impact value is different. In the plate, it belongs to low alloy series. In the low alloy material, this material is the most common. Q345 used to be called 16Mn. Due to the implementation of the standard, this kind of steel plate is allowed to be delivered with negative tolerance.

Product Parameter

Standerd	GB ASTM ISO JIS DIN
Steel pipe grade	Q345 16MN E355CC E355M Gr.50 SN400 S355JR
Lengh	hot rolled (extruded and expanded): 3-12m
Outer Diameter	hot rolled:32-756mm
wall thickness	2.5-100mm
Processing Service	Cutting or according to the customer's demand
Packaging Details	Bare packing/wooden case /waterproof cloth
Terms of Payment	T/T L/C at sight
20 feet container contains dimension	Length under 6000mm
40 feet container contains dimension	Length under 12000mm
Samples	Free samples are provided but the freight is paid by the buyer
Min order	1 Ton

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Chemical Composition

Q345A：C≤0.20，Mn ≤1.70，Si≤0.50，P≤0.035，S≤0.035；

Q345B：C≤0.20，Mn ≤1.70，Si≤0.50，P≤0.035，S≤0.035；

Q345C：C≤0.20，Mn ≤1.70，Si≤0.50，P≤0.030，S≤0.030，Al≥0.015；

Q345D：C≤0.18，Mn ≤1.70，Si≤0.50，P≤0.030，S≤0.025，Al≥0.015；

Q345E：C≤0.18，Mn ≤1.70，Si≤0.50，P≤0.025，S≤0.020，Al≥0.015；

Q345A、B、C、D、E均含Nb≤0.07，V≤0.15，Ti≤0.20，Cr≤0.30，Ni≤0.012，Mo≤0.10。

Product Application

Q345 is a kind of low alloy steel with good comprehensive mechanical properties, low temperature properties, good plasticity and weldability. It is used for medium and low pressure vessels, oil tanks, vehicles, cranes, mining machinery, power stations, bridges and other structures, mechanical parts, building structures and general metal structural parts under dynamic load