CI
Ductile & gray iron
Good castability, vibration damping, compressive strength, and cost efficiency for housings, hubs, and supports.
Material Selection
Select metal grades around load, wear, corrosion, and total cost.
We help translate application conditions into practical cast iron, carbon steel, alloy steel, stainless steel, and non-ferrous material options.
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 steelStrength & wear
Stainless steelCorrosion resistance
Material families
Common starting points for industrial metal parts.
The final grade should match the drawing, service condition, process route, heat treatment, and inspection requirements.
CS
Carbon steel
Broad availability and practical strength for brackets, bases, weldments, and general machinery parts.
AS
Alloy steel
Higher strength, hardenability, fatigue resistance, and wear performance for demanding loaded components.
SS
Stainless steel
Corrosion resistance and cleanability for wet, chemical, food-adjacent, and outdoor environments.
AL
Aluminum alloys
Lower mass, corrosion resistance, and machinability for covers, housings, and moderate-load components.
BR
Bronze & copper alloys
Useful for bearing surfaces, sliding wear, conductivity, and selected corrosion conditions.
Material grades
Grades we commonly cast and machine.
Typical grades by family, with common international equivalents. Other grades can be reviewed against the drawing and application.
CS
Carbon steel
20, 35, 45; cast steel ZG230-450, ZG270-500; WCB (≈ AISI 1020 / 1035 / 1045, ASTM A216 WCB).
AS
Alloy steel
13CrMo, 30CrMo, 35CrMo, 42CrMo, 40Cr, 35CrMnSi (≈ AISI 4130 / 4140 / 5140, DIN 34CrMo4 / 42CrMo4).
SS
Stainless steel
304, 304L, 316, 316L, 321; cast CF8, CF8M (≈ ASTM A351 CF8 / CF8M).
DI
Ductile (nodular) iron
QT400-18, QT450-10, QT500-7, QT600-3, QT700-2 (≈ EN-GJS-400-18 to 700-2, ASTM A536 60-40-18 / 65-45-12 / 80-55-06).
GI
Grey cast iron
HT150, HT200, HT250, HT300 (≈ EN-GJL-150 to 300, ASTM A48 Class 30 / 35 / 40).
HT
Heat treatment
Normalizing, quench & temper, carburizing, and solution treatment to the specified condition and hardness.
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
Lock chemistry, condition, heat treatment, hardness, and equivalents.
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.
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, but the customer should approve the final material definition and acceptance criteria.
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.