What This Part Is And Why It Is Made This Way
Ductile iron gives most of the strength of steel with the castability and damping of iron, which makes it the usual answer for structural brackets in machinery. The trade is that the grade has to be verified, because nodularity cannot be seen.
Brackets are cast in EN-GJS-400 through EN-GJS-800 by green sand, resin sand or shell moulding.
What You Get From This Route
Grades from EN-GJS-400 to EN-GJS-800 cover a wide strength and ductility range.
Damping capacity reduces vibration transmission compared with a steel weldment.
Complex cavities cast directly instead of fabricated.
Application Scenarios
- Machine mounting brackets
- Bearing support structures
- Frame and housing supports
- Vibration sensitive mounting components
Who It Is For
- Machine builders replacing steel weldments
- Designers needing damping as well as strength
- Buyers standardising bracket families
Technical Features
- Ductile iron EN-GJS-400 / 450 / 500 / 600 / 700 / 800
- Green sand, resin sand and shell processes
- Weight 0.2 kg - 2000 kg
- Grade and route matched to drawing and application
What Buyers Run Into Without This Specification
- A part ordered as GJS-500 tests below the grade.
- A steel weldment transmits vibration into the machine frame.
- Complex bracket shapes are expensive to fabricate.
Published Material Weight And Process Data
Figures below are the published capability for cast iron. Part specific values — tolerance on individual features, finish, packing — are confirmed at drawing review and marked TBC until then.
| Grey Iron | EN-GJL-150 / 200 / 250 / 300 |
|---|---|
| Ductile Iron | EN-GJS-400 / 450 / 500 / 600 / 700 / 800 |
| ADI | ADI800-10 / ADI1200-3 |
| Weight Range | 0.2 kg - 2000 kg |
| Process | Green sand process; resin sand process; shell process |
| Selection Basis | Grade and moulding route matched to customer drawing and application scenario |
| Part Specific Tolerance | TBC — confirmed against the customer drawing |
| Minimum Order Quantity | TBC — depends on the process route selected |
| Lead Time | TBC — confirmed with the production base at quotation |
How The Part Is Made And Checked
- Green Sand — High volume production of repeat parts at the lowest tooling cost.
- Resin Sand — Larger parts and complex cavities where dimensional stability matters more than cycle time.
- Shell Process — Better surface and dimensional accuracy for mid size batches.
Quality management is based on ISO 9001 and covers supplier management, raw material inspection, production process control and final inspection. Inspection results are archived and traceable.
Options And Alternatives
Parts are produced to the customer drawing rather than to a fixed catalogue item, so material grade, machining scope, surface treatment and packing are all specified per order. Machining, dimensional control, surface treatment and necessary pre-assembly can be added to the same supply route.
Where another process family would suit the part better — for example a forging in place of a casting for a shock loaded connector — that comparison is raised during drawing review rather than after tooling is committed.
How To Specify This Part
State the grade and say whether mechanical properties are to be verified on a separately cast sample or on the part itself. That single choice is behind most disputes over ductile iron acceptance.
- Send the drawing with material, quantity, quality standard and target delivery date.
- State the inspection class and the zones it applies to, rather than a general note.
- Confirm the packing requirement and the lifting equipment available at the destination.
Related Guides
Other Parts In This Range
Mechanical Wear and Conveying Components
Screws, flights and wear surfaces
View specifications
Disc Type Iron Castings
Flat discs, plates and covers
View specifications
Wheel and Transmission Components
Pulleys, wheels and drive iron parts
View specifications
Disc Base Iron Castings
Base plates with integral bosses
View specificationsDuctile Iron Structural Brackets — Frequently Asked Questions
Which ductile iron grades are available?
EN-GJS-400, 450, 500, 600, 700 and 800 are covered in the cast iron business.
Which moulding process will be used?
Green sand, resin sand or shell moulding, matched to the customer drawing, the batch size and the application scenario.
What do you need to prepare a quotation?
Drawings, material, quantity, quality standard and target delivery date.
Which inspection is included?
The inspection scope is agreed during drawing review. Better surface and dimensional accuracy for mid size batches.
Get A Quotation For Ductile Iron Structural Brackets
Send the drawing and the application. We will confirm the process route, the production base and the inspection scope before quoting.