WDB690 Steel Plate Applications & Ordering Guide
WDB690 (C/D/E) Wugang low weld-crack-sensitivity HSLA plate [queue key WDB690] 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 WDB690 (C/D/E) Wugang low weld-crack-sensitivity HSLA plate [queue key WDB690] with EN 10204 mill test certificates.
Typical Applications and Service Conditions
WDB690 (C/D/E) Wugang low weld-crack-sensitivity HSLA plate [queue key WDB690] 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 TMCP (often <=50 mm) or Q+T (thicker); quality letter C/D/E sets impact temperature should be stated explicitly on the purchase order.
Industry Use Cases
Pressure equipment and process: shells, heads, and related platework when drawings name WDB690 (C/D/E) Wugang low weld-crack-sensitivity HSLA plate [queue key WDB690]. 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 (WDB690 (C/D/E) Wugang low weld-crack-sensitivity HSLA plate [queue key WDB690])
Tabulated heat analysis follows YB/T 4137 Q690CFD public CF-steel band. Wugang lists WDB690(C,D,E) alongside Q690CF on its CF product page; mill WDB690 edition may tighten Pcm/Ceq by thickness (historic WDB620 notes cite Pcm<=0.20 TMCP / <=0.24 QT). Confirm ordered quality letter and mill sheet on the MTC.
| Element / rule | Requirement |
|---|
| C, max | 0.09 |
| Si, max | 0.50 |
| Mn, max | 2.00 |
| P, max | 0.018 |
| S, max | 0.010 |
| Cr, max | 0.80 |
| Ni, max | 1.80 |
| Mo, max | 0.70 |
| V, max | 0.100 |
| Nb, max | 0.120 |
| Ti, max | 0.050 |
| B, max | 0.0050 |
Mechanical Properties - Supporting Data (WDB690 (C/D/E) Wugang low weld-crack-sensitivity HSLA plate [queue key WDB690])
Confirm thickness, specimen orientation, and any supplementary impact, UT, or hardness requirements on the PO.
| Property | Requirement |
|---|
| Yield Rp0.2, min (t<=50 mm) | 690 MPa |
| Yield Rp0.2, min (50 < t <=100 mm) | 670 MPa |
| Tensile Rm | 770-940 MPa |
| Elongation A, min | 14% |
| Impact KV2 (quality D, -20 C) | 60 J min (Q690CFD reference) |
| Delivery / HT | TMCP and/or Q+T per mill 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 |
|---|
| YB/T 4137 | Q690CFC / Q690CFD / Q690CFE | National CF 690 MPa family reference |
| Mill | WDB620 | Lower-strength Wugang CF sibling |
| GB/T 16270 | Q690D/E | Non-CF QT HSLA - welding Pcm differs |
Frequently Asked Questions
Where is WDB690 (C/D/E) Wugang low weld-crack-sensitivity HSLA plate [queue key WDB690] typically applied?
WDB690 (C/D/E) Wugang low weld-crack-sensitivity HSLA plate [queue key WDB690] 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 WDB690 (C/D/E) Wugang low weld-crack-sensitivity HSLA plate [queue key WDB690]?
Design temperature and pressure, toughness or creep allowables, weldability, corrosion or process media, and the governing code edition drive selection. Delivery condition TMCP (often <=50 mm) or Q+T (thicker); quality letter C/D/E sets impact temperature must align with the ordered specification.
Can a near-equivalent replace WDB690 (C/D/E) Wugang low weld-crack-sensitivity HSLA plate [queue key WDB690] 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 WDB690 (C/D/E) Wugang low weld-crack-sensitivity HSLA plate [queue key WDB690].
What fabrication notes matter for WDB690 (C/D/E) Wugang low weld-crack-sensitivity HSLA plate [queue key WDB690]?
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 WDB690 (C/D/E) Wugang low weld-crack-sensitivity HSLA plate [queue key WDB690].
How should I RFQ WDB690 (C/D/E) Wugang low weld-crack-sensitivity HSLA plate [queue key WDB690] plate from Gangsteel for a project?
Send WDB690 (C/D/E) Wugang low weld-crack-sensitivity HSLA plate [queue key WDB690], 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 WDB690 (C/D/E) Wugang low weld-crack-sensitivity HSLA plate [queue key WDB690], 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.
