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GB/T 713 Q345R steel plate, also written as Q345R pressure vessel steel plate, GB713 Q345R, Q345R boiler steel plate, formerly 16MnR, is a C-Mn pressure vessel / boiler plate grade under GB/T 713 / GB/T 713.2. Minimum yield is 345 MPa for thickness 3–16 mm, tensile typically 510-640 MPa in that band, with Charpy V-notch at 0°C. Gangsteel (HENAN GANG IRON AND STEEL) produces and exports Q345R plates cut to size with mill test certificates for boilers, pressure vessels, heat exchangers and petrochemical equipment.
Data source: Per GB/T 713 / GB/T 713.2-2023 (Steel plate, sheet and strip for pressure equipments — Part 2: Non-alloy and alloy steel with specified temperature properties; buyers still search “GB/T 713”). Official mill/certificate grade is Q345R. Verify the contracted edition and purchase-order supplements before ordering.
| Element | C | Si | Mn | P | S | Alt |
|---|---|---|---|---|---|---|
| Q345R, % | 0.20 max | 0.55 max | 1.20-1.70 | 0.025 max | 0.010 max | per edition |
| Element | Cu | Ni | Cr | Mo | Nb | V/Ti |
|---|---|---|---|---|---|---|
| Q345R, % | 0.30 max | 0.30 max | 0.30 max | 0.08 max | 0.050 max | 0.050/0.030 max |
Per GB/T 713.2 heat analysis. Cu+Ni+Cr+Mo ≤0.70%. For t>60 mm, C upper limit may rise to 0.22%.
| Thickness | Yield ReL, min | Tensile Rm | Elongation A, min | Impact KV2 |
|---|---|---|---|---|
| 3–16 mm | 345 MPa | 510-640 MPa | 21% | 0°C, ≥41 J |
| >16–36 mm | 325 MPa | 500-630 MPa | 21% | 0°C, ≥41 J |
| >36–60 mm | 315 MPa | 490-620 MPa | 21% | 0°C, ≥41 J |
| >60–100 mm | 305 MPa | 490-620 MPa | 20% | 0°C, ≥41 J |
| >100–150 mm | 285 MPa | 480-610 MPa | 20% | 0°C, ≥41 J |
| >150–250 mm | 265 MPa | 470-600 MPa | 20% | 0°C, ≥40 J |
Per GB/T 713.2. Use Rp0.2 when yield is not distinct. -20°C impact may replace 0°C when specified.
Hot-rolled, normalized-rolled, normalized, or normalized + tempered by thickness and order. Killed steel. Optional UT, Z-test, HIC/NACE, elevated-temperature tensile, PWHT simulation and 3.1/3.2 MTC.
Commonly 6–200 mm (up to 250 mm by edition/capability), width 1500-4000 mm, length 6000-18000 mm.
Workhorse Chinese C-Mn plate for medium/high-pressure boilers, vessels, heat exchangers, separators, reactors, tanks and petrochemical equipment.
| Standard | Comparable grade (approximate) |
|---|---|
| GB/T 713 | Q345R |
| ASTM/ASME | ASTM A516 / A516 Grade 70 / SA516 Gr.70 (approx.; dual cert by agreement) |
| EN 10028-2 | P265GH / P355GH family (approx.) |
| Related GB/T 713 | Q245R | Q370R | Q420R | Q460R | 18MnMoNbR |
Equivalents are engineering references only. Dual certification requires the stricter combined limits on the PO and MTC.
It is a C-Mn boiler and pressure vessel steel under GB/T 713 / GB/T 713.2. a C-Mn pressure vessel / boiler plate grade under GB/T 713 / GB/T 713.2. Minimum yield is 345 MPa for thickness 3–16 mm, tensile typically 510-640 MPa in that band, with Charpy V-notch at 0°C. Gangsteel lists the official mill/certificate grade as Q345R. See the full GB/T 713 Q345R page for chemistry and mechanical tables.
345 MPa min at 3–16 mm; 325/315/305/285/265 MPa in thicker bands up to 250 mm. Typical tensile bands are shown in the mechanical properties table on this page; confirm the contracted GB/T 713.2 edition before design.
0°C standard (KV2 typically ≥41 J); -20°C by agreement. Always state the required Charpy temperature and energy on the purchase order.
Hot-rolled, normalized-rolled, normalized, or normalized + tempered by thickness and order. Killed steel. Optional UT, Z-test, HIC/NACE, elevated-temperature tensile, PWHT simulation and 3.1/3.2 MTC.
All sit in the GB/T 713.2 non-alloy / microalloy vessel family. Sister carbon grades: Q245R / Q370R / Q420R / Q460R. Hub: GB/T 713 Steel Plate.
No. They are often compared for design but chemistry, impact and delivery rules differ. See ASTM A516 and A516 Grade 70 / SA516 Gr.70. Dual certification needs the stricter combined limits on the PO and MTC.
EN 10204 3.1 as standard; 3.2 with third-party inspection when ordered. MTC lists heat analysis, mechanical tests, delivery condition and any optional UT / Z / HIC / elevated-temperature results.
Commonly 6–200 mm (up to 250 mm by edition/capability), width 1500-4000 mm, length 6000-18000 mm. Browse the GB/T 713 hub for the full grade list.
GB/T 713 Steel Plate | Q345R | Q245R | 15CrMoR | ASTM A516 | ASTM A387 | ASTM A537 | Pressure Vessel Steel Plate | Boiler Steel Plate
