16MnR Steel Plate Applications & Ordering Guide
16MnR (GB 6654-1996) pressure-vessel plate; successor practice Q345R (GB/T 713) is specified for industrial fabrications where the drawing or material list names this grade. This applications page explains where the grade is used, what service conditions drive selection, and which certificate details belong on the purchase order. Gangsteel supplies 16MnR (GB 6654-1996) pressure-vessel plate; successor practice Q345R (GB/T 713) with EN 10204 mill test certificates.
Typical Applications and Service Conditions
16MnR (GB 6654-1996) pressure-vessel plate; successor practice Q345R (GB/T 713) plate is ordered for pressure equipment, process vessels, heat-exchanger related fabrications, structural members under the governing code, and project packages that call the grade by name. Match the mill test certificate grade mark to the calculation sheet; do not treat near-equivalents as automatic substitutes.
Service drivers include the design temperature and pressure of the governing code (ASME, EN/PED, class society, or project specification), weld procedure qualification needs, toughness or creep allowables where applicable, and inspection scope. Delivery condition Hot-rolled / normalized per thickness; killed should be stated explicitly on the purchase order.
Industry Use Cases
Pressure equipment and process: shells, heads, and related platework when drawings name 16MnR (GB 6654-1996) pressure-vessel plate; successor practice Q345R (GB/T 713). Power and energy: boiler and heat-recovery fabrications under the ordered edition. Marine / offshore (when classed): only when the society material list names this exact grade stamp. Always keep heat-number traceability on cut pieces.
Chemical Composition - Supporting Data (16MnR (GB 6654-1996) pressure-vessel plate; successor practice Q345R (GB/T 713))
Legacy GB 6654 16MnR ladle limits. For new Code work prefer GB/T 713 Q345R and confirm which book is stamped on the MTC.
| Element / rule | Requirement |
|---|
| C, max | 0.20 |
| Si | 0.20-0.55 |
| Mn | 1.20-1.60 |
| P, max | 0.035 |
| S, max | 0.030 |
| Cr / Ni / Cu, max each | 0.30 |
Mechanical Properties - Supporting Data (16MnR (GB 6654-1996) pressure-vessel plate; successor practice Q345R (GB/T 713))
Confirm thickness, specimen orientation, and any supplementary impact, UT, or hardness requirements on the PO.
| Property | Requirement |
|---|
| Tensile / yield (6-16 mm) | 510-640 MPa / >=345 MPa |
| Tensile / yield (>16-36 mm) | 500-630 MPa / >=325 MPa |
| Tensile / yield (>36-60 mm) | 490-620 MPa / >=315 MPa |
| Tensile / yield (>60-100 mm) | 490-620 MPa / >=305 MPa |
| Elongation A, min | ~21% typical (confirm edition) |
Related / Near-Equivalent Grades
Near-equivalents are for cross-reference only. They are not automatic code substitutes. Substitution requires engineer approval and matching certificate scope.
| System | Grade | Note |
|---|
| GB/T 713 | Q345R | Modern successor |
| ASTM | A516 Grade 70 (approx. strength) | Not identical chem |
Frequently Asked Questions
Where is 16MnR (GB 6654-1996) pressure-vessel plate; successor practice Q345R (GB/T 713) typically applied?
16MnR (GB 6654-1996) pressure-vessel plate; successor practice Q345R (GB/T 713) is applied where design documents, class material lists, or purchaser specs name this grade for pressure, process, structural, or marine fabrications as applicable. Match the MTC marking to the drawing.
What service conditions drive selection of 16MnR (GB 6654-1996) pressure-vessel plate; successor practice Q345R (GB/T 713)?
Design temperature and pressure, toughness or creep allowables, weldability, corrosion or process media, and the governing code edition drive selection. Delivery condition Hot-rolled / normalized per thickness; killed must align with the ordered specification.
Can a near-equivalent replace 16MnR (GB 6654-1996) pressure-vessel plate; successor practice Q345R (GB/T 713) on an applications drawing?
Not without redesign and written approval. Near-equivalents differ in chemistry, heat treatment, impact temperature, or product form. Commercial swaps create non-conformance when the dossier names 16MnR (GB 6654-1996) pressure-vessel plate; successor practice Q345R (GB/T 713).
What fabrication notes matter for 16MnR (GB 6654-1996) pressure-vessel plate; successor practice Q345R (GB/T 713)?
Use approved WPS/PQR packages for the thickness and filler, control heat input, and preserve heat-number traceability on cut pieces. State any supplementary UT, PMI, or impact tests on the purchase order.
What certificate and marking should an applications PO demand?
EN 10204 3.1 is standard; 3.2 when a purchaser-appointed inspector witnesses tests. The MTC should show heat analysis, tensile results, delivery condition, and heat number aligned with 16MnR (GB 6654-1996) pressure-vessel plate; successor practice Q345R (GB/T 713).
How should I RFQ 16MnR (GB 6654-1996) pressure-vessel plate; successor practice Q345R (GB/T 713) plate from Gangsteel for a project?
Send 16MnR (GB 6654-1996) pressure-vessel plate; successor practice Q345R (GB/T 713), thickness x width x length (or nesting list), quantity, delivery condition, optional NDT/PMI, certificate type, destination, and any dual-mark needs. Note the end use when special flatness or cut-to-size packaging is required.
Ordering and Mill Certificates
State grade 16MnR (GB 6654-1996) pressure-vessel plate; successor practice Q345R (GB/T 713), dimensions, quantity, delivery condition, optional NDT/PMI, and certificate (EN 10204 3.1 standard; 3.2 when third-party inspection is ordered). Gangsteel supplies export plate and related products with mill test certificates. Contact Gangsteel for stock and mill production RFQs.
