12Cr2 Steel Plate Applications & Ordering Guide
12Cr2Mo1R (GB/T 713.2) [queue key 12Cr2 truncated] 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 12Cr2Mo1R (GB/T 713.2) [queue key 12Cr2 truncated] with EN 10204 mill test certificates.
Typical Applications and Service Conditions
12Cr2Mo1R (GB/T 713.2) [queue key 12Cr2 truncated] 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 Normalized plus tempered; tempering temperature >=680 C should be stated explicitly on the purchase order.
Industry Use Cases
Pressure equipment and process: shells, heads, and related platework when drawings name 12Cr2Mo1R (GB/T 713.2) [queue key 12Cr2 truncated]. 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 (12Cr2Mo1R (GB/T 713.2) [queue key 12Cr2 truncated])
Ladle analysis per GB/T 713.2-2023 for 12Cr2Mo1R. Lower C limit may be waived by agreement. Queue key 12Cr2 on project/12Cr2 pages is treated as 12Cr2Mo1R (2.25Cr-1Mo). If a different 12Cr2* grade was intended, correct on MTC.
| Element / rule | Requirement |
|---|
| C | 0.08-0.15 |
| Si, max | 0.50 |
| Mn | 0.30-0.60 |
| P, max | 0.020 |
| S, max | 0.010 |
| Cr | 2.00-2.50 |
| Mo | 0.90-1.10 |
| Cu, max | 0.20 |
| Ni, max | 0.30 |
Mechanical Properties - Supporting Data (12Cr2Mo1R (GB/T 713.2) [queue key 12Cr2 truncated])
Confirm thickness, specimen orientation, and any supplementary impact, UT, or hardness requirements on the PO.
| Property | Requirement |
|---|
| Tensile Rm (6-200 mm, N+T) | 520-680 MPa |
| Yield ReL/Rp0.2, min | 310 MPa |
| Elongation A, min | 19% |
| Impact KV2 at 20 C, min | 47 J |
| Delivery / HT | Normalized + tempered (>=680 C temper) |
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 |
|---|
| ASME | SA387 Grade 22 | Approx. 2.25Cr-1Mo twin - confirm class |
| EN | 12CrMo9-10 | EN 10028 near-equivalent |
| ISO | 12CrMo9-10 | ISO 9328 family |
Frequently Asked Questions
Where is 12Cr2Mo1R (GB/T 713.2) [queue key 12Cr2 truncated] typically applied?
12Cr2Mo1R (GB/T 713.2) [queue key 12Cr2 truncated] 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 12Cr2Mo1R (GB/T 713.2) [queue key 12Cr2 truncated]?
Design temperature and pressure, toughness or creep allowables, weldability, corrosion or process media, and the governing code edition drive selection. Delivery condition Normalized plus tempered; tempering temperature >=680 C must align with the ordered specification.
Can a near-equivalent replace 12Cr2Mo1R (GB/T 713.2) [queue key 12Cr2 truncated] 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 12Cr2Mo1R (GB/T 713.2) [queue key 12Cr2 truncated].
What fabrication notes matter for 12Cr2Mo1R (GB/T 713.2) [queue key 12Cr2 truncated]?
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 12Cr2Mo1R (GB/T 713.2) [queue key 12Cr2 truncated].
How should I RFQ 12Cr2Mo1R (GB/T 713.2) [queue key 12Cr2 truncated] plate from Gangsteel for a project?
Send 12Cr2Mo1R (GB/T 713.2) [queue key 12Cr2 truncated], 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 12Cr2Mo1R (GB/T 713.2) [queue key 12Cr2 truncated], 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.
