GB/T Q345D carbon and low-alloy high-strength steel

Description: Q345D carbon and low-alloy high-strength steel grade with a yield strength of not less than 345MPa, Q represents the yield strength, and the quality grade is D (grades are divided into A, B, C, D, E). Q345D steel is compared with Q345A, B, C steel. Low te...

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Q345D steel Description

Q345D carbon and low-alloy high-strength steel grade with a yield strength of not less than 345MPa, Q represents the yield strength, and the quality grade is D (grades are divided into A, B, C, D, E). Q345D steel is compared with Q345A, B, C steel. Low temperature impact energy test temperature is low (-20 ℃ minimum 27J). Q345 low-alloy steel is an alloy steel with a total alloying element of less than 5%. Compared with carbon steel, low-alloy steel is intentionally added to the steel on the basis of carbon steel in order to improve the properties of the steel. an alloying element.

The parts of Q345D low carbon alloy steel welded structure usually need to go through processes such as forming - welding - post-weld heat treatment, which requires the steel to have good process performance. Process properties include metal weldability, machinability, cold and hot working properties, heat treatment properties, forgeability, uniformity and stability of the structure and hardenability of large sections. While considering the cost of materials, the influence of different degrees of difficulty in material processing and welding on the manufacturing cost should also be considered. Q345 low carbon alloy steel is widely used in bridges, vehicles, ships, buildings, pressure vessels, general metal structures, etc.

Q345D steel Datasheet

Product	Q345D Hot rolled carbon steel sheet
Thickness	3mm-55mm
Width range	600mm-1500mm
Length	3000mm, 6000mm, 12000mm
Surface	Clean, blasting and painting according to customer requirement
Packaging Details	steel strip packed. Standard Export Seaworthy Package.Suit for all kinds of transport,or as required
Payment Terms	LC, TT

Q345D steel Chemical composition

Grade	C	Si	Mn	P	S	Nb	V	Ti	Cr	Ni	Cu	N	Mo	Als
Q345D	0.18	0.50	1.70	0.030	0.025	0.07	0.15	0.20	0.30	0.5	0.30	0.012	0.1	Min. 0.015

Q345D steel Mechanical Properties

Steel Standard	Steel Grade	Yield Strength Mpa	Tensile Stregth Map	Elongation %
Q345	A	345	470~630	21
	B	345	470~630	21
	C	345	470~630	22
	D	345	470~630	22
	E	345	470~630	22

Equivalent Grade of Q345D steel

Grade	Standard	Country	Application
SS490YA	JIS	Japan	Mainly used across various commercial applications including construction, cranes, poles, bridges, road plate and other high-strength applications
S355J2	EN	Europen	Widely used in manufacture of chilly work dies, punches, cold chopping scissors, drill bushes, gauges, wire drawing dies, coining dies, draw bench boards, drawing dies, thread rolling dies, and so forth.