Reliable Pressure Vessel Steel Plates from China

Product Range & Introduction:

GB 713 Q245R and Q345R steel plates are premium quality carbon structural steels widely used in manufacturing pressure vessels, boilers, and heat exchangers. These grades conform to the Chinese national standard GB 713 and meet stringent requirements for strength, weldability, and toughness under high temperature and pressure conditions.

CJM is a trusted Chinese steel supplier with an extensive inventory exceeding 1 million tons, ensuring fast delivery and customized processing for clients worldwide.

Product Overview

Grade	Description	Standard	Typical Use
Q245R	Low alloy pressure vessel steel plate	GB 713	Boilers, pressure vessels, tanks
Q345R	Higher strength low alloy steel plate	GB 713	Pressure vessels, chemical reactors

Chemical Composition

Element	Q245R (%)	Q345R (%)
Carbon (C)	0.12 – 0.20	0.12 – 0.20
Manganese (Mn)	0.50 – 1.20	1.00 – 1.60
Phosphorus (P)	≤0.035	≤0.035
Sulfur (S)	≤0.035	≤0.035
Silicon (Si)	0.20 – 0.50	0.20 – 0.50
Copper (Cu)	–	0.30 max
Nickel (Ni)	–	0.30 max
Chromium (Cr)	–	0.30 max
Molybdenum (Mo)	–	0.08 max

Mechanical Properties

Property	Q245R	Q345R
Tensile Strength (MPa)	410 – 550	470 – 630
Yield Strength (MPa)	≥245	≥345
Elongation (%)	≥21	≥20
Impact Toughness	≥27J at -20°C	≥27J at -20°C

Dimensions & Surface

• Thickness: 5 mm to 120 mm
• Width: Up to 3000 mm
• Length: Up to 12000 mm
• Surface: Hot rolled, pickled, or shot blasted
• Edges: Mill edge or sheared
• Tolerance: According to GB 713 standard

Custom sizes and processing services available to meet your project needs.

Typical Applications

• Pressure vessels and boilers
• Chemical and petrochemical reactors
• Heat exchangers and condensers
• Oil and gas storage tanks
• Industrial piping systems

Why Choose CJM for GB 713 Q245R / Q345R Plates?

• Large stock ensuring quick shipment worldwide
• Strict quality control to meet international standards
• Customized processing: cutting, beveling, drilling
• Experienced logistics support for smooth export
• Trusted supplier to clients in Southeast Asia, Middle East, Africa, Europe, and Americas

Packaging & Shipping

• Bundled with steel strips
• Waterproof wrapping & edge protection
• Wooden pallets or as per buyer request
• Shipping by container or bulk vessel

Request a Quote

Contact CJM to get the best price for GB 713 Q245R / Q345R in all grades and sizes.
👉 Fill out our contact form or email us at info@cjmstainlesssteel.com to get your free quote and mill certificate.

Q: What is your company’s main products/services?

A: We are a professional manufacturer for Carbon Steel, Alloy Steel and Profile products. We have the experience of steel business for more than 10 years and our products are exported to Mid East,South America,Southeast Asia,Africa,South and East Asia etc.

Q: Can I go to your factory for a visit?

A: Of course, we welcome customers from all over the world to visit our factory.

Q: What are your terms of payment?

A: 30% T/T deposite and 70% balance before shipment.

Q: What is your delivery time?

A: For stocks,we could transport the goods to loading port within 7 days after we received the deposit; For production,it usually takes about 15-30 days after receiving the deposit.

Q: Do you provide samples? Are they free or paid?

A: Samples are available for free,but the courier freight will be covered by customer account.

Q: Do you accept the third party inspection?

A:Yes, we fully accept ‌third-party inspections.

Q: Why should I buy from you not from other suppliers?

A: Integrating the superior resources of China’s steel industry, we provide customers with high-quality steel products at preferential prices, and can ensure that the goods are delivered to customers in a timely manner.

Q:How can you guarantee quality?

A: Always a pre-production sample before mass production;Always 100% inspected before shipment