GBT714 High-strength structural steel plate

GB/T 714 high-strength structural steel plates are carbon and low-alloy steel materials designed for use in bridges, buildings, and other
structural applications, offering excellent strength and toughness. We provide certified industrial supply.

1.Excellent welding performance and toughness
2.Various steel grades and thicknesses available
3.Complies with international and domestic quality standards

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GBT714 High-strength structural steel description

GB/T 714 steel plates, developed by China’s national standard, are widely used in pressure vessels and boilers due to their excellent mechanical properties and adaptability to a wide range of operating conditions. In the power generation industry, GB/T 714 steel plates are commonly used in boiler drums, steam headers, and superheaters, offering excellent strength and high-temperature creep resistance. In the oil and gas sector, these plates are used in the manufacture of storage tanks for liquefied natural gas, crude oil, and other hydrocarbons, providing reliable performance at medium to low temperatures and high pressures. In the chemical industry, GB/T 714 steel plates are used in the manufacture of reactors, distillation columns, and heat exchangers, where resistance to corrosive environments and thermal stresses is crucial. Furthermore, these plates are used in marine boiler systems, industrial gas storage tanks, and sanitary pressure vessels for food and pharmaceutical processing. Due to its high weldability, toughness, and compliance with stringent standards, GB/T 714 steel plates are the preferred choice of EPC contractors and pressure vessel manufacturers worldwide.

GBT714Chemical Composition/Tensile Requirements(part)

grade

Quality
Grade

Chemical composition (mass fraction)/%

Als.e

No more than

Q345q

C
D
E

0.14

0.55

0.90~
1.60

0.010~
0.090

0.010~
0.080

0.006~
0.030

0.010~
0.045

0.30

一

0.0080

Q370q

D
E

1.00～1.60

Q420q

D
E
F

0.11

1.00～1.70

0.50

0.30

0.20

Q460q

0.25

Q500q

0.80

0.70

0.30

Upon agreement between the supplier and buyer, the maximum manganese content may be 2.00%.
Al, Nb, V, and Ti may be added to the steel individually or in combination. When added individually, they must comply with the requirements in the table. When added in combination, at least one alloying element must meet the lower limit specified in the table, and Nb + V + Ti must be ≤ 0.22%.
When calculating the total aluminum (Al) content, the total aluminum content should be 0.015% to 0.050%.

GBT714-Tensile Requirements
grade	Quality Grade	Tensile test.					Impact test
		Lower yield strength Ra./MPa			tensile strength Rm/MPa	Elongation at break A/%	temperature ℃	Impact absorption energy KV₂/J
		thickness ≤50mm	50 mm<thickness ≤100 mm	100 mm<thickness ≤150mm
		Not less than						Not less than
Q345q	C	345	335	305	490	20	0	120
	D						-20
	E						-40
Q370q	C	370	360	一	510	20	0	120
	D						-20
	E						-40
Q420q	D	420	410	一	540	19	-20	120
	E						-40
	F						-60	47
Q420q	D	420	410	一	540	19	-20	120
	E						-40
	F						-60	47
Q460q	D	460	450	一	570	18	-20	120
	E						-40
	F						-60	47
Q500q	D	500	480	一	630	18	-20	120
	E						-40
	F						-60	47
Q550q	D	550	530	一	660	16	-20	120
	E						-40
	F						-60	47
Q620q	D	620	580	一	720	15	-20	120
	E						-40
	F						-60	47
Q690q	D	690	650	一	770	14	-20	120
	E						-40
	F						-60	47
When yield strength is not apparent, R can be measured instead of the lower yield strength. Transverse specimens are used for tensile testing. Longitudinal specimens are used for impact testing.

Products Categories

Pressure Vessel Steel

Pipeline Steel

Pipe Fittings Steel

Stainless Steel

Galvanized Steel

High-strength Structural Steel

Quality Carbon Structural Steel

Offshore and Marine Structural Steel

Nuclear Power Steel

Corten Steel&Weathering Steel

Wind Turbine Tower Steel

Nickel-Based Low Temperature Structural Steel

Wear-Resistant Steel

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GBT714 High-strength structural steel Application

GBT714 high-strength structural steel is a high-performance steel that complies with the Chinese national standard (GB/T 714). It is primarily used in bridges, construction, machinery manufacturing, and heavy engineering. Its primary applications include: 1) Bridge construction, such as large sea- and river-crossing bridges, where its high strength and excellent fatigue resistance allow it to withstand complex loads and harsh environments; 2) Steel frameworks for high-rise buildings and large venues, providing excellent seismic resistance and structural stability; 3) Key components of construction machinery, such as cranes and excavators, meeting high strength and wear resistance requirements; 4) Marine engineering, such as offshore platforms and ship structures, offering excellent corrosion resistance and toughness; and 5) Railways and mass transit, where it is used in the manufacture of track and bridge components, ensuring long-term safety. Furthermore, GBT714 steel, due to its excellent weldability and processability, is widely used in modern engineering projects requiring a high strength-to-weight ratio to meet the demands of complex designs and extreme operating conditions.

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GB/T714 FAQs:

1.What is GB/T 714 steel used for?

It is primarily used for manufacturing structural components in bridges, buildings, and other large-scale infrastructure projects, as well as for pressure vessels and heavy machinery requiring high strength and toughness.

2.What grades are available for GB/T 714 steel?

The common grades include Q235q, Q345q, Q370q, and Q420q, with Q345q being the most widely used due to its balanced strength, weldability, and impact resistance.

3.Can GB/T 714 plates be customized?

Yes, we offer customized sizes, thicknesses (typically from 6mm to 200mm), and edge preparation (cutting, beveling, drilling) based on your project requirements.