Gray Cast Iron Round Bar
Gray cast iron round bar is produced by casting molten iron into a mold, then cooling it to form a solid bar with a graphite flake structure. This structure provides good vibration damping and wear resistance, making it suitable for machine bases, engine blocks, and pump housings. Jialu supplies gray cast iron bar across multiple international standards, so a project requiring ISO 185, ASTM A48, DIN 1691, EN 1561 or
- Graphite flake structure provides inherent vibration damping and wear resistance
- Multiple international standards covered on one stock list and one contract
- Custom sizes available, so no need to source from multiple suppliers for different dimensions
- Mixed-grade orders accepted, so projects with varying strength requirements stay on one purchase order
Mill certificates issued against the ordered grade and standard. Third-party inspection available on request.
What This Material Is For
Gray cast iron round bar is produced by casting molten iron into a mold, then cooling it to form a solid bar with a graphite flake structure. This structure provides good vibration damping and wear resistance, making it suitable for machine bases, engine blocks, and pump housings. Jialu supplies gray cast iron bar across multiple international standards, so a project requiring ISO 185, ASTM A48, DIN 1691, EN 1561 or JIS G5501 grades does not need to be split across multiple foundries. Custom sizes are available, and one order can include multiple grades and standards.
Why Buyers Choose It
- Graphite flake structure provides inherent vibration damping and wear resistance
- Multiple international standards covered on one stock list and one contract
- Custom sizes available, so no need to source from multiple suppliers for different dimensions
- Mixed-grade orders accepted, so projects with varying strength requirements stay on one purchase order
- Third-party inspection can be arranged before shipment to avoid delays upon arrival
Where It Is Used
- Machine tool bases and bed plates requiring vibration damping and dimensional stability
- Engine blocks and cylinder heads where wear resistance and heat dissipation are critical
- Pump and valve casings exposed to abrasive or erosive fluids
- Foundry components such as rolls, gears, and housings in industrial machinery
- Structural supports and brackets in heavy equipment where cost and damping matter more than tensile strength
Who It Is For
- Machinery fabricators sourcing cast iron components for industrial equipment
- Foundries buying raw bar stock for secondary machining or remelting
- Equipment OEMs specifying multiple standards for different parts in one assembly
- Procurement teams managing projects with mixed international designations
Problems It Solves
- Splitting one bar scope across multiple foundries due to standard or grade limitations
- Delays caused by waiting for multiple inspection reports from different suppliers
- Inconsistent material traceability when sourcing from multiple mills with different certification levels
- Difficulty in matching bar size and grade to a drawing that calls out multiple standards
- Higher logistics cost from multiple shipments when one order could cover all requirements
Technical Features
- Graphite flake structure provides vibration damping and good machinability
- Available in standard grades from ISO 185, ASTM A48, DIN 1691, EN 1561, JIS G5501 and others
- Custom sizes available upon request, with no minimum order size specified
- Cast and cooled under controlled conditions to minimize shrinkage and porosity
- Surface finish suitable for machining or further processing without rework
Grades Standards And Size Range
Values below come from the published product data. Anything not listed is confirmed per enquiry.
| ISO 185 Grades | 100, 150, 200, 250, 300, 350 |
|---|---|
| China GB9439 Grades | HT100, HT150, HT200, HT250, HT300, HT350 |
| USA ASTM A48 Grades | NO.20, NO.25, NO.30, NO.35, NO.40, NO.45, NO.50, NO.55, NO.60 |
| Germany/Austria DIN 1691 Grades | GG10, GG15, GG20, GG25, GG30, GG35, GG40 |
| European EN 1561 Grades | EN-GJL-100, EN-GJL-150, EN-GJL-200, EN-GJL-250, EN-GJL-300, EN-GJL-350 |
| Japan JIS G5501 Grades | FC100, FC150, FC200, FC250, FC300, FC350 |
| Italy UNI 5007 Grades | G10, G15, G20, G25, G30, G35 |
| France NF A32-101 Grades | FGL150, FGL200, FGL250, FGL300, FGL350, FGL400 |
| Spain UNF Grades | FG15, FG20, FG25, FG30, FG35 |
| UK BS 1452 Grades | 100, 150, 200, 250, 300, 350 |
| India IS 210 Grades | FG150, FG200, FG260, FG300, FG350, FG400 |
| Australia AS 1830 Grades | T150, T220, T260, T300, T350, T400 |
| Sweden SS 14 01 Grades | O110, O115, O120, O125, O130, O135, O140 |
| Norway NS11 100 Grades | SJG100, SJG150, SJG200, SJG250, SJG300, SJG350 |
| Size | Customized |
Materials
- Gray cast iron with flake graphite structure for vibration damping and wear resistance
- Standard carbon iron with controlled carbon and silicon content to meet international grade requirements
- Material selected based on tensile strength and hardness requirements from the specified standard
Manufacturing Route
Quality Control
- Chemical composition verified against the ordered standard
- Mechanical properties tested for tensile strength and hardness
- In-house CNAS-certified laboratory performs routine testing
- Mill certificates issued per purchase order and standard
- Third-party inspection available on request, bookable at order stage
Customisation Options
- Grade and standard selected per line item, so one order can mix ISO, ASTM, DIN, EN and JIS callouts
- Custom diameter and length available upon request
- OEM service accepted for branding and marking
- Packing and labeling arranged to meet destination port and inspection requirements
How It Compares With The Alternatives
| Ductile iron bar | Gray iron is cheaper and better for damping; ductile iron has higher tensile strength and ductility but costs more and is harder to machine |
|---|---|
| Machined steel bar | Gray iron is lower cost and better for vibration damping; steel is stronger and more durable but heavier and more expensive |
| Aluminum bar | Gray iron is stiffer and more wear-resistant; aluminum is lighter and easier to machine but less rigid and more prone to deformation under load |
Buying Guide
- Start from the project’s design standard, then select the grade family before size
- For vibration-sensitive applications, choose a grade with higher damping capacity, typically lower tensile strength
- For wear resistance, select a higher-grade bar such as HT300 or EN-GJL-300
- Send the size and grade table with the enquiry, as availability varies by diameter and standard
- Book third-party inspection at order stage to avoid delays after shipment
Questions About Gray Cast Iron Round Bar
Which standards do you supply gray cast iron bar against?
ISO 185, China GB9439, USA ASTM A48, Germany/Austria DIN 1691, European EN 1561, Japan JIS G5501, Italy UNI 5007, France NF A32-101, Spain UNF, UK BS 1452, India IS 210, Australia AS 1830, Sweden SS 14 01, Norway NS11 100.
Can one order include multiple grades and standards?
Yes. Mixed-grade and mixed-standard orders are standard here, which is why buyers consolidate with us instead of splitting across foundries.
Are custom sizes available?
Yes. Custom diameters and lengths are available upon request.
What certification backs the material?
The company holds ISO 9001, API Q1, PED, CE, API 5L, 5CT, 5DP, with an in-house CNAS-certified laboratory. Mill certificates are issued per purchase order.
Can we appoint our own inspector?
Yes. Third-party inspection is available on request and is best booked at order stage so the production schedule allows for it.
What payment terms and currencies do you accept?
L/C, T/T, PayPal and credit card, in USD, CAD, AUD, SGD, EUR or RMB.
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Get Gray Cast Iron Round Bar Quoted
Send the grade, size and quantity. Availability, price and lead time come back per line item.