CI
Ductile & gray iron castings
Regular material families for suitable housings, hubs, and supports. Specify ductile or grey iron, grade, standard, mechanical properties, and delivery condition.
Material Selection
Casting Material Selection for Carbon Steel and Iron Parts
Carbon steel, ductile iron, and grey iron are our regular material families. We confirm the exact grade, condition, casting route, and required documents against your drawing. Stainless steel, alloy steel, and other special materials need separate feasibility confirmation.
Drawing-based reviewLow-to-mid volumeExport support
Capability pageClear technical scope, practical production route, and RFQ-ready evidence.
Application first
Choose the grade for the service condition—not by habit.Load · impact · wear · temperature · corrosion · weldabilityCast ironDuctile & gray iron
Carbon steelGeneral structural use
Alloy steelEvaluable per drawing
Stainless steelPart-specific review
Material families
Regular materials and grades requiring separate confirmation.
The final grade should match the drawing, service condition, casting route, heat treatment or surface finish, and required inspection documents. For other materials, the production route and verification requirements are assessed before quotation. The three-family cross-reference lists the gray iron, ductile iron, and carbon steel grades buyers most often write on drawings.
CS
Carbon steel castings
A regular material family for suitable drawing-based cast components. Define the cast grade and its governing standard rather than relying on a general steel description.
AS
Alloy steel
Part-specific confirmation is required. Send the grade, heat treatment, properties, section thickness, and test requirements before selecting this route. Alloy and wear-resistant grades stay outside the common gray iron, ductile iron, and carbon steel list.
SS
Stainless steel casting review
Part-specific confirmation is required. Include the exact cast grade, service environment, delivery condition, and required qualification documents.
AL
Not regular: aluminium
Outside the regular steel-and-iron casting range shown here. Send the drawing for a separate route assessment; availability is not implied by this material category.
BR
Not regular: bronze
Outside the regular steel-and-iron casting range shown here. Any quotation requires confirmation of the alloy, production route, and supplier responsibilities.
Industry materials
From an industry page to the regular material family.
These five industries are reviewed in the same regular families. The grade for your part is confirmed against the drawing. Aluminium and bronze are not regular materials.
| Industry | Page | Regular material family |
|---|---|---|
| Power line hardware | Power line fittings | Carbon steel, ductile iron, grey iron |
| Oilfield equipment | Cable protectors and cross-coupling clamps | Carbon steel, ductile iron, grey iron |
| Agricultural machinery | Agricultural castings and brackets | Ductile iron, grey iron, carbon steel |
| Construction equipment | Heavy equipment castings | Carbon steel, ductile iron, grey iron |
| Industrial machinery | Industrial machinery castings | Carbon steel, ductile iron, grey iron |
Which materials are regular for JK Casting?
Carbon steel, ductile iron and grey iron are regular materials. Stainless and alloy steel are reviewed part by part. Aluminium and bronze are not regular materials. Die casting is not offered.
Which material family should I use for these industries?
Power line hardware, oilfield parts, agricultural machinery, construction equipment and industrial machinery are reviewed in carbon steel, ductile iron or grey iron. The grade for your part is confirmed against the drawing.
Can I ask for an EN 10204 3.1 certificate?
Specify the requested certificate or report type, including EN 10204 3.1 if required. The issuer, covered results and traceability are confirmed with the quotation.
Common grades
Gray iron, ductile iron, and carbon steel cross-reference.
Names in one row are approximate inquiry cross-references for the three regular casting families. A shared row is not approval to substitute one standard for another. For the full ductile iron comparison, including ГОСТ and JIS grades and minimum property values, see the Ductile Iron Grades Chart. Gray iron and cast carbon steel have their own charts: the Gray Iron Grades Chart and Cast Carbon Steel Grades. To choose the process, see Sand Casting vs Investment Casting.
Scroll sideways to compare standards
| Family | GB / common CN | DIN / EN | ASTM | Notes |
|---|---|---|---|---|
| Gray iron (grey iron) | HT200; HT250; HT300 | GG20 / EN-GJL-200; GG25 / EN-GJL-250; GG30 / EN-GJL-300 | ASTM A48 Class 30; Class 35; Class 40 | Listed in the same order as a common inquiry cross-reference: HT200 with GG20 / EN-GJL-200 / Class 30, then HT250 and HT300 in the same way. Tensile class still follows the named standard. |
| Ductile iron | QT400-15; QT450-10; QT500-7; QT600-3 (QT400–QT600 range) | GGG40 / EN-GJS-400-15; EN-GJS-450-10; GGG50 / EN-GJS-500-7; GGG60 / EN-GJS-600-3 | ASTM A536 60-40-18; 65-45-12; 80-55-06 | 60-40-18 is the usual inquiry pair for QT400-15 / GGG40 / EN-GJS-400-15. 65-45-12 is the usual pair for QT450-10 / EN-GJS-450-10. 80-55-06 is the usual pair for QT600-3 / GGG60 / EN-GJS-600-3. QT500-7 / GGG50 / EN-GJS-500-7 stays in this family; confirm the ASTM grade on the drawing. |
| Carbon steel | ZG230-450; ZG270-500. Inquiry cross-reference only: 25#, 35#, 45# (wrought grades, not cast designations). | Use the standard named on the drawing. This table does not assign a DIN grade to a WCB callout. | ASTM A216 WCB. WCC is an adjacent A216 grade when the drawing specifies it. ASTM A27 is a common reference; confirm the A27 grade on the drawing. 1020 and 1045 are wrought designations sometimes written on cast-part inquiries. | A WCB callout does not imply pressure-vessel, valve, PED, or API certification. 1020, 1045, 25#, 35#, and 45# need a cast-versus-wrought check before quotation. |
合金钢 / 耐磨（可评估）
Alloy and wear-resistant grades, evaluable only.
These grades are commonly inquired and are reviewed for suitable geometry. They are not stocked, and they are not poured on every order. They are not part of the common-grade table above.
CrMo
20CrMo and 35CrMo
Part-specific. Heat treatment follows the drawing or purchase order. These grades are reviewed for the part; they are not listed with the common gray iron, ductile iron, or carbon steel grades.
Mn
High-manganese steel
ZGMn13-series castings may be reviewed with ASTM A128 Grade A, B, C, D, or E as reference equivalents. The same footnote applies: the match is approximate, the drawing's standard and acceptance criteria govern, and substitution needs buyer approval.
No hardness figure is offered as a guaranteed HRC value. No mine-equipment certification is claimed.
Material specification
Give the complete material designation.
Similar grade names are not an automatic approval for substitution. The RFQ needs the standard, product form, heat-treatment condition, and acceptance requirements.
Grade and standard
Copy the exact designation and standard revision from the drawing. State whether the requirement is for a casting, forging, or wrought material.
Delivery condition
Include heat treatment, hardness range, test location, and any mechanical-property requirements.
Inspection documents
Specify the requested certificate or report type, including EN 10204 3.1 if required. The issuer, covered results, and traceability are confirmed with the quotation.
Substitution approval
If an alternative grade is proposed, confirm it with the buyer before production. Similar names or cross-reference tables do not replace that approval.
Technical evidence before production
Selection logic
Define the duty cycle before comparing grades.
Material selection is strongest when the engineering inputs describe how the part fails, not only what grade was used previously.
✓Static, cyclic, shock, or impact loading
✓Wear mode: abrasion, galling, erosion, or sliding
✓Outdoor, marine, chemical, or high-temperature exposure
✓Required hardness, toughness, and fatigue life
✓Welding, machining, and heat-treatment constraints
✓Target cost, annual demand, and replacement interval
Practical workflow
A clear route from service conditions to a production material.
1
Describe the application
Load, motion, exposure, temperature, wear, and failure history.
2
Shortlist material families
Balance properties, casting behavior, machining, sourcing, and cost.
3
Confirm grade & treatment
Confirm the specified grade and condition. Any proposed substitution needs buyer approval against the applicable standard.
4
Verify production evidence
Review certificates, hardness, mechanical tests, or other required records.
Deliverables & controls
Material definition that purchasing and production can use.
Document the technical basis so purchasing, production, inspection, and shipment use the same requirements.
Grade and accepted equivalents
Document the primary grade and whether equivalent regional standards are allowed. The common-grade cross-reference is an inquiry aid, not a substitution approval.
Heat-treatment condition
Normalize, anneal, quench and temper, solution treat, or other specified condition.
Hardness and test location
Define target range, conversion limits, sampling, and measurement location.
Certificate requirements
Clarify chemistry, mechanical properties, heat number traceability, and third-party testing needs.
Frequently asked questions
Questions buyers ask before release.
Use these answers as a starting point. Final acceptance criteria should be tied to the drawing, purchase order, and approved technical record.
Can you recommend an equivalent Chinese material grade?
We can propose practical equivalents for review. The common-grade table is an approximate cross-reference. The buyer approves the final material definition and acceptance criteria before production.
Do all parts need material certificates?
No. Certificate scope depends on risk, industry, drawing requirements, and buyer expectations. It should be defined before quotation.
Can heat treatment be included?
Yes. Heat treatment can be included when the required condition, hardness, distortion controls, and inspection are clearly specified.
How do you handle uncertain legacy materials?
Samples may be evaluated through chemistry, hardness, microstructure, and application evidence before a replacement grade is proposed.
Ready for review
Send your part requirements for a practical quotation path.
Share drawings, models, samples, quantities, material requirements, finish, inspection scope, and target delivery. We will review the evidence and identify the next technical step.