GP280GH EN10213 Casting — 1.0625 Pressure & Structural Cast Steel

GP280GH EN10213 Casting is the custom manufacturing service of Leesh Holdings for EN 10213 material number 1.0625 — a weldable cast steel developed for pressure purposes and load-bearing structural components. We pour, heat-treat, machine and test every GP280GH steel casting to your drawing, so what you receive is a finished, certified component rather than a semi-finished blank.

What Is GP280GH (Material 1.0625)?

GP280GH is the grade name, 1.0625 is its material number, and enquiries often arrive written as GP 280 GH 1.0625 — all three point to the same steel. Covered by EN 10213 (steel castings for pressure purposes), this 1.0625 pressure casting grade offers good weldability combined with a guaranteed minimum yield strength of 280 MPa. Delivered quenched and tempered (+QT), it holds tensile strength between 480 and 640 MPa with 35 J of impact energy at room temperature — a balance that makes 1.0625 cast steel a dependable choice for pressurised and welded structures.

Chemical Composition & Mechanical Properties

Guaranteed values to EN 10213:2007. Final acceptance limits always follow your purchase specification and drawing — material is produced against Customer Requirements.

CHEMICAL COMPOSITION (%)

MECHANICAL PROPERTY (+QT)

Equivalent Grades & Cross References

For global projects, GP280GH is commonly cross-referenced with other weldable cast steel families: ASTM A216 WCB for pressure-containing parts in the US market, JIS SCW480 for welded structures in Japan, and GB ZG270-480H in China. These are near-equivalents by strength level and weldability — not automatic substitutions. Our engineers compare chemical limits, impact requirements and testing scope for every conversion, so the GP280GH steel casting we deliver meets the governing standard, not just the nearest name on a chart.

Applications of GP280GH Steel Castings

• Valve bodies, bonnets and gate components for steam and process lines
• Pump housings and impeller chambers
• Pressure vessel nozzles, flanges and fittings
• Structural node and junction castings for bridges and buildings
• Centrifugally cast pipes and rings
• Energy, offshore and general engineering equipment

In each case the reason is the same: 1.0625 cast steel pours into complex shapes, welds predictably into surrounding fabrications, and carries verified toughness.

Manufacturing Capability at Leesh Holdings

Every casting project starts from your 3D model or 2D drawing and moves through one controlled workflow:

• Sand casting and investment casting routes, matched to part size, complexity and order quantity
• Heat treatment — quenching & tempering (+QT) or normalising (+N) — with calibrated furnace charts
• Full machining to drawing dimensions, tolerances and surface finish requirements
• Weld repair only under approved procedures, with re-NDT after any repair
• NDT and testing: visual, PT, MT, UT, RT, hydrostatic pressure testing, PMI and mechanical verification on attached test coupons

Material test certificates are issued to EN 10204 3.1 or 3.2, and third-party inspection is welcome at any stage.

FAQ

What is a GP280GH EN10213 casting?

It is a steel casting produced to the European standard EN 10213 in grade GP280GH (material number 1.0625) — a weldable cast steel intended for pressure purposes. Leesh Holdings manufactures these components to customer drawings, including heat treatment, machining and testing.

Is GP280GH the same as ASTM A216 WCB?

They are close cross-references, not identical grades. Both are weldable cast steels of similar strength, but EN 10213 and ASTM A216 differ in chemical limits and testing scope. We map the two specifications part by part and confirm acceptance criteria with you before production starts.

What heat treatment does GP 280 GH 1.0625 require?

The standard mechanical values apply to the quenched and tempered (+QT) condition. Normalised (+N) delivery is possible where the application allows, with impact energy of 27 J at room temperature in that condition. The specified condition is always recorded on the material certificate.

Can you produce castings to our own specification instead of EN 10213?

Yes. Material is melted and accepted against Customer Requirements — your drawing, your supplementary tests, your tolerances. EN 10213 serves as the baseline, and anything your specification adds or replaces takes priority.

How is pricing calculated?

Each part is priced individually from its weight, casting complexity, machining content and testing scope, so pricing is custom rather than catalogue-based. Send your drawing and specification for a firm quotation.

Request a Quote for GP280GH EN10213 Castings

Send us your drawing (PDF/STEP), the governing standard and your inspection requirements, and our engineering team will return a technical review with a quotation. For custom GP280GH EN10213 casting projects — from single replacement pieces to serial production — Leesh Holdings supports you from pattern-making to certified, machined components.