SA662 Steel Plate Applications & Ordering Guide
ASME SA662 / ASTM A662 family (tables show Grade C; confirm ordered grade) 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 ASME SA662 / ASTM A662 family (tables show Grade C; confirm ordered grade) with EN 10204 mill test certificates.
This page is a standalone technical article. For the primary overview on the original URL, see ASME SA662 / ASTM A662 family (tables show Grade C; confirm ordered grade) primary specification page.
Typical Applications and Service Conditions
ASME SA662 / ASTM A662 family (tables show Grade C; confirm ordered grade) 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 when t>40 mm [1.5 in]; thinner plate as-rolled or normalized per order should be stated explicitly on the purchase order.
Industry Use Cases
Pressure equipment and process: shells, heads, and related platework when drawings name ASME SA662 / ASTM A662 family (tables show Grade C; confirm ordered grade). 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 (ASME SA662 / ASTM A662 family (tables show Grade C; confirm ordered grade))
Heat and product analysis limits per A662/A662M Grade C. SA662 pages are family-level; tabulated values are A662 Grade C. Confirm Grade A/B/C on the PO/MTC.
| Element | Heat analysis % | Product analysis % |
|---|
| C, max | 0.20 | 0.24 |
| Mn | 1.00-1.60 | 0.92-1.72 |
| P, max | 0.025 | 0.025 |
| S, max | 0.025 | 0.025 |
| Si | 0.15-0.50 | 0.13-0.55 |
Mechanical Properties - Supporting Data (ASME SA662 / ASTM A662 family (tables show Grade C; confirm ordered grade))
Confirm thickness, specimen orientation, and any supplementary impact, UT, or hardness requirements on the PO.
| Property | Requirement |
|---|
| Tensile strength | 70-90 ksi [485-620 MPa] |
| Yield strength, min | 43 ksi [295 MPa] |
| Elongation in 200 mm, min | 18% |
| Elongation in 50 mm, min | 22% |
| Delivery condition | Normalized when t>40 mm; thinner AR or N per PO |
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 |
|---|
| ASTM | A662 Grade A / B | Same family; lower tensile bands |
| ASTM | A516 Grade 70 | Common PV carbon plate - not automatic substitute |
| ASTM | A537 Class 1 (approx. strength) | Different heat-treatment class - engineer review |
Frequently Asked Questions
Where is ASME SA662 / ASTM A662 family (tables show Grade C; confirm ordered grade) typically applied?
ASME SA662 / ASTM A662 family (tables show Grade C; confirm ordered grade) 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. Primary overview: ASME SA662 / ASTM A662 family (tables show Grade C; confirm ordered grade).
What service conditions drive selection of ASME SA662 / ASTM A662 family (tables show Grade C; confirm ordered grade)?
Design temperature and pressure, toughness or creep allowables, weldability, corrosion or process media, and the governing code edition drive selection. Delivery condition Normalized when t>40 mm [1.5 in]; thinner plate as-rolled or normalized per order must align with the ordered specification.
Can a near-equivalent replace ASME SA662 / ASTM A662 family (tables show Grade C; confirm ordered grade) 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 ASME SA662 / ASTM A662 family (tables show Grade C; confirm ordered grade).
What fabrication notes matter for ASME SA662 / ASTM A662 family (tables show Grade C; confirm ordered grade)?
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 ASME SA662 / ASTM A662 family (tables show Grade C; confirm ordered grade).
How should I RFQ ASME SA662 / ASTM A662 family (tables show Grade C; confirm ordered grade) plate from Gangsteel for a project?
Send ASME SA662 / ASTM A662 family (tables show Grade C; confirm ordered grade), 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 ASME SA662 / ASTM A662 family (tables show Grade C; confirm ordered grade), 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.
