GB/T 713 Q345R Steel Plate | Q345R Pressure Vessel Plate

GB/T 713 Q345R, also written Q345 R, GB/T 713.2 Q345R, 16MnR and Q345R steel plate, is the workhorse Chinese boiler and pressure-vessel plate. Current product rules sit in GB/T 713.2-2023. Buyers still search GB/T 713. Yield is 345 MPa at 3–16 mm. Tensile in that band is 510–640 MPa. Delivery is hot rolled, normalized rolling, normalizing, or normalizing plus tempering. SHH STEEL is a global steel mill sourcing partner and steel manufacturer & exporter (mill-direct, China origin) for this grade. Plate is produced to GB/T 713 / GB/T 713.2 and shipped to buyers in the USA, Mexico, South America, Europe, Middle East, Africa and Asia.

A purchase order that only says “Q345 vessel plate” is incomplete. Write GB/T 713 Q345R or GB/T 713.2 Q345R. Do not ship structural Q345B / Q355B against a Q345R drawing. Do not ship SA516 Gr.70 and stamp Q345R because tensile looks close. Impact temperature, P / S, delivery condition and GB/T 150 rules are not the same as ASME SA-516.

Old names still appear on drawings: 16MnR, 16Mng, 19Mng. Those names were merged into Q345R. If the drawing still says 16MnR, confirm whether the buyer accepts Q345R marking or needs both names on the certificate.

This page is not JIS G3106 SM490. It is not DIN 17100 St52-3. It is not QT alloy under ASME SA387 or ASME SA543. It is not low-temperature 16MnDR under GB/T 713.3.

Company scope: global steel mill sourcing partner – SHH STEEL.

This plate sits in pressure vessel steel plates and carbon steel plates. ASME comparisons belong on ASME SA516 and ASTM A516, not as automatic substitutes.

GB/T 713 Q345R / Q345 R heat analysis follows GB/T 713.2 Table 1. Product analysis follows the permitted deviations in GB/T 713.1. Write “heat + product analysis” on the order if both are required.

Heat Analysis and Product Analysis — GB/T 713 Q345R

For thickness greater than 60 mm, carbon may rise to 0.22% heat analysis when the standard allowance is used. Nb + V + Ti together shall not exceed 0.120% on Q345R. Do not treat structural Q355B chemistry as Q345R. Do not treat Q245R chemistry as Q345R. SHH STEEL reports heat analysis on every certificate and product analysis when the order names it.

If the file is HIC / NACE, write that separately. Ordinary Q345R is not automatically Q345R-HIC.

Yield starts at 345 MPa at 3–16 mm and falls as thickness rises.

Tensile and Yield — GB/T 713 Q345R (typical published bands)

Impact for Q345R is commonly 0 °C, 41 J minimum. Write the test temperature if the destination file wants −20 °C. Do not quote 345 MPa yield on a 80 mm plate. Do not treat 510–640 MPa tensile as permission to stamp SA516 Gr.70 without checking yield, impact and PWHT.

These names are project-comparison grades. They are not automatic substitutes. Dual marking is possible only when chemistry, tensile, impact, delivery condition and all extras fit both named editions.

ASME SA515, ASME SA387 and ASME SA203 are not Q345R.

GB/T 713 Q345R / Q345 R is selected for boilers, drums, heat-exchanger shells, towers, tanks and other pressure equipment that name the Chinese vessel book at the 345 MPa step. It is the plate Chinese fabricators use most. It is not automatically an ASME Section VIII plate. If the vessel is ASME, the drawing should name an ASME or ASTM grade such as SA516 Gr.70, SA516 Gr.65 or SA537 Cl.1.

SHH STEEL supplies this plate to fabricators in the United States, Mexico, South America, Europe, the Middle East, Africa and Asia. It is not nickel low-temp plate like SA203 Gr.D or SA203 Gr.E. It is not QT Ni-Cr-Mo like SA543 Type B Cl.1. It is not Cr-Mo like SA387 Gr.22 Cl.2 or 15CrMoR. Stainless inquiries belong on ASME SA240 or ASTM A240.

Q345R is killed C-Mn vessel plate. Welding is production welding, and Code welding when the equipment is a vessel.

Qualify procedures to the applicable code. For ASME work that happens to use a dual-named plate, use ASME Section IX. Consumables should match the 510–640 MPa tensile band, not a SA387 Gr.12 Cl.2 Cr-Mo procedure and not a QT procedure from SA517 Gr.F. Preheat follows thickness and hydrogen control. The fabricator owns the WPS. SHH STEEL can share mill heat data for that review.

Usual delivery from SHH STEEL is hot rolled, normalized rolling or normalized GB/T 713 Q345R. Normalizing plus tempering is used when the order names it. As-rolled thin plate is common. Thick plate is usually normalized.

If the vessel will see PWHT, test coupons shall follow a simulated cycle when the order names it. This is not the QT route used on SA738 Gr.B or SA737 Gr.C. Special heat treatment, extra simulation or third-party hold points add time. Plan about two months when those extras are on the order.

The certificate lists GB/T 713 Q345R or GB/T 713.2 Q345R; heat number; heat analysis; product analysis when ordered; tensile results to the correct thickness column; delivery condition; impact at 0 °C or the named temperature. Certificates may be EN 10204 3.1 or EN 10204 3.2. Dual marking to SA516 Gr.70 is available only when both books are met.

Usual supply range from SHH STEEL for Q345R pressure vessel plate:

• Thickness: commonly 6 mm – 200 mm. Confirm any request above 150 mm against mill capability
• Width: 1500 mm – 4000 mm
• Length: 3000 mm – 12000 mm
• Cut-to-length plates and nest sizes inside those limits

Ship plate inquiries belong on shipbuilding steel plates or BV Rules. Weathering plate belongs on EN 10025-5 or Corten A/B. TMCP fine-grain structural belongs on EN 10025-4. QT structural belongs on EN 10025-6. Ordinary structural belongs on EN 10025-2 or JIS G3106.

Dimensional limits follow GB/T 713.1 and the mill rolling standard named on the order. Do not apply ASTM A36/A36M structural tolerances to a Chinese vessel plate without writing them. UT to GB/T 2970, JB/T 4730, EN 10160 or ASTM A435 / A577 / A578 is added when the order names it.

Most export GB/T 713 Q345R / Q345 R orders add extras. SHH STEEL does not assume them.

Charpy details. Temperature, energy, location and orientation. GB default is commonly 0 °C.

Product analysis. Add this when the destination file wants finished-plate chemistry.

Simulated PWHT. When the equipment will be stress-relieved.

NDE. UT per the named method.

Z-direction. Z15 / Z25 / Z35 when the drawing names it.

HIC / NACE / SSC. Only when written. Ordinary Q345R is not Q345R-HIC.

Third-party. EN 10204 3.2, with inspectors arranged for US, Mexican, European, Middle East, Japanese or Korean documentation packages.

Stainless inquiries belong on stainless steel products, JIS G4305 or AISI stainless. Other vessel comparisons: SA203 Gr.B, SA302 Gr.B, A516 Grade 70, SA533 Type C Cl.2, SA517 Gr.P, SA738 Gr.C.

SHH STEEL is a global steel mill sourcing partner with mill partnerships in China. We supply ASTM, ASME, EN, DIN, JIS and GB steel to buyers outside a single region. Origin is mill-direct, China origin.

SHH STEEL has supplied steel plates to:

• North America: USA, Mexico
• South America: Argentina, Peru and other South American ports
• Central America: El Salvador
• Europe: Spain, Netherlands, Germany and surrounding ports
• Middle East: UAE, Saudi Arabia and nearby Gulf ports
• Africa: South Africa
• South / Southeast Asia: India, Thailand, Singapore, Vietnam, Philippines
• East Asia: Japan, Korea

Typical trade terms: FOB Shanghai, CIF Houston, CIF Rotterdam, CIF Jebel Ali, plus Manzanillo, Callao, Buenos Aires, Barcelona, Durban, Laem Chabang, Ho Chi Minh, Manila, Mumbai, Yokohama and Busan.

Typical lead time for GB/T 713 Q345R:

• Ex-stock: about 5–7 days
• Mill rolling, standard AR / N: about 45 days
• HIC, simulated PWHT, 3.2 or extra NDE: about 2 months

Documents travel with the cargo: mill certificate, packing list, commercial invoice, bill of lading, and EN 10204 3.1 or 3.2 as ordered. Third-party inspection can be arranged before loading. Packing is seaworthy, with edge protection and marking in English as specified on the order.

SHH STEEL is a global steel mill sourcing partner and steel manufacturer & exporter (mill-direct, China origin). We supply ASTM / ASME / EN / DIN / JIS / GB steel to the USA, Mexico, South America, Europe, the Middle East, Africa and Asia. On GB/T 713 Q345R / Q345 R that means mill pricing, Q345R chemistry reported as heat analysis and as product analysis when ordered, recorded delivery condition, tensile results to the correct thickness column, 345 MPa yield in the thin band, 3.1 as standard and 3.2 when specified.

We keep the grade on the order. Q345R is not Q245R. Q345R is not Q370R. Q345R is not structural Q355B. Q345R is not 16MnDR. Q345R is not SA516 Gr.70 unless both books are met. Q345R is not SA387 Gr.22 Cl.2.

Company scope: global steel mill sourcing partner – SHH STEEL.

GB/T 713 Q345R Steel Plate, also searched as Q345 R, GB/T 713.2 Q345R and 16MnR, is China’s main boiler and pressure-vessel plate at the 345 MPa yield step, 510–640 MPa tensile in the thin band. Whether the inquiry says GB/T 713 Q345R, Q345 R or Q345R Pressure Vessel Plate, SHH STEEL as a global steel mill sourcing partner and steel manufacturer & exporter (mill-direct, China origin) supplies plate with Q345R chemistry, heat and product analysis when ordered, recorded delivery condition, and EN 10204 3.1 or 3.2 certification.

SHH STEEL supplies GB/T 713 Q345R / Q345R Pressure Vessel Plate to the USA, Mexico, South America, Europe, the Middle East, Africa and Asia for work that actually names this grade. FOB Shanghai / CIF Houston / Rotterdam / Jebel Ali.

Contact SHH STEEL for mill rolling, stock inquiry, normalize, dual SA516 Gr.70 marking when eligible, HIC, impact testing, 3.2 inspection or a quotation.

GB/T 713 Q345R Steel Plate, Q345 R, GB/T 713.2 Q345R, 16MnR, Q345R pressure vessel plate, Q345R supplier, global steel mill sourcing partner SHH STEEL