WH70 Steel Plate Applications & Ordering Guide
WH70 (Wuyang / Wugang high-strength structural plate) 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 WH70 (Wuyang / Wugang high-strength structural plate) with EN 10204 mill test certificates.
Typical Applications and Service Conditions
WH70 (Wuyang / Wugang high-strength structural plate) 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 Controlled-rolled / TMCP per mill condition; confirm HT on MTC should be stated explicitly on the purchase order.
Industry Use Cases
Pressure equipment and process: shells, heads, and related platework when drawings name WH70 (Wuyang / Wugang high-strength structural plate). 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 (WH70 (Wuyang / Wugang high-strength structural plate))
Heat analysis from published Wuyang WH70 tech-condition summaries. Confirm mill edition (Q/WTB) on MTC - enterprise specs revise.
| Element / rule | Requirement |
|---|
| C, max | 0.07 |
| Si, max | 0.50 |
| Mn, max | 1.80 |
| P, max | 0.020 |
| S, max | 0.010 |
| Mo, max | 0.50 |
| Nb, max | 0.08 |
| B, max | 0.003 |
| Ni, max | 0.70 |
| Cu, max | 1.10 |
Mechanical Properties - Supporting Data (WH70 (Wuyang / Wugang high-strength structural plate))
Confirm thickness, specimen orientation, and any supplementary impact, UT, or hardness requirements on the PO.
| Property | Requirement |
|---|
| Yield, min (t<20 mm) | 550 MPa |
| Yield, min (20-30 mm) | 530 MPa |
| Yield, min (30-60 mm) | 520 MPa |
| Tensile, min | 670 MPa |
| Delivery | Per Wuyang WH70 tech condition |
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 1591 | Q550 family (approx.) | Nearest national HSLA band |
| Mill | WH80 / WH80Q | Higher Wuyang sisters |
Frequently Asked Questions
Where is WH70 (Wuyang / Wugang high-strength structural plate) typically applied?
WH70 (Wuyang / Wugang high-strength structural plate) 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 WH70 (Wuyang / Wugang high-strength structural plate)?
Design temperature and pressure, toughness or creep allowables, weldability, corrosion or process media, and the governing code edition drive selection. Delivery condition Controlled-rolled / TMCP per mill condition; confirm HT on MTC must align with the ordered specification.
Can a near-equivalent replace WH70 (Wuyang / Wugang high-strength structural plate) 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 WH70 (Wuyang / Wugang high-strength structural plate).
What fabrication notes matter for WH70 (Wuyang / Wugang high-strength structural plate)?
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 WH70 (Wuyang / Wugang high-strength structural plate).
How should I RFQ WH70 (Wuyang / Wugang high-strength structural plate) plate from Gangsteel for a project?
Send WH70 (Wuyang / Wugang high-strength structural plate), 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 WH70 (Wuyang / Wugang high-strength structural plate), 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.
