Quality Assurance
Materials & Quality
Quality engineered into every step — material confirmation through process control to shipment.
Covering material validation, APQP development, full-dimensional inspection, leak testing, batch traceability, and pre-shipment review.
Material System
Ferrous alloy system for high-temperature, high-reliability applications. Grade recommended based on your operating conditions, drawing specs, and validation path.
The following material families are used across projects with different thermal loads, structural complexity, and service-life requirements. Specific recommendations are confirmed during DFM / feasibility review.
| Grade | Type | Typical Application |
|---|---|---|
| HT250 | Gray Iron | Standard exhaust manifolds, general engine components |
| D5S | High-Nickel Austenitic Ductile Iron | High-temperature exhaust manifolds, higher thermal cycling loads Rm 474MPa · Rp0.2 248MPa · A 16.5% · 168HBW— CTI |
| Heat-Resistant Cast Steel | Cast Steel | Extreme temperature exhaust components Rm 556MPa · Rp0.2 268MPa · A 19.0% · 188HBW— CTI |
| RuTSi4Mo | Compacted Graphite Iron (CGI) | Higher thermal fatigue resistance for exhaust / hot-end applications Rm 601MPa · Rp0.2 543MPa · 244HBW— CTI |
| RuT300 | Compacted Graphite Iron (CGI) | Engine blocks, cylinder heads — high thermo-mechanical loads |
| QT400 / QT450-10 | Ductile Iron | Structural parts requiring strength and elongation C 3.85% · Si 2.75% · Mn 0.26%— Lab |
How Materials Are Verified
Chemical Composition Verification
Chemistry confirmed per drawing / customer spec using spectrometer analysis for critical element ranges.
e.g. D-2: C 2.76%, Ni 18.8% — spectrometer verified (CTI)
Hardness Verification
Verified per project requirements.
e.g. QTRSi4Mo1: 244HBW — Brinell tested (CTI)
Metallographic Verification
Graphite grade, nodularity, pearlite content verified against specification.
e.g. D-2: Grade 1 spheroidization, 95.1% — metallographic verified (CTI)
Controlled from Raw Material
Material control starts with raw material list, source qualification, and batch verification.
Material Verification Path
Quality Control Flow
Prevention-first quality control — layer by layer from incoming to shipment, ensuring every batch you receive meets spec.
Incoming Inspection
Material certificate check, key chemistry verification, batch identification, and supplier source management.
First Article Inspection
Key dimensions, material/metallography items, and critical characteristics verified before batch release.
In-Process Patrol
Temperature, key dimensions, appearance, and critical process parameters patrolled during production. Abnormalities isolated and adjusted per reaction plan.
Final Inspection
Full-dimensional, thread, leak, appearance, and cleanliness checks executed per project requirements.
Pre-Shipment Review
Packaging, batch marking, documentation package, and shipment status confirmed before dispatch.
Critical characteristics are monitored with process capability targets defined by control plan and customer requirements.
Inspection Equipment & Lab
Converting your drawing's material, dimensional, and process requirements into verifiable inspection results.
Spectrometer
Key element chemistry verification
CMM
Critical dimensions, position, flatness, profile measurement
Metallographic Microscope
Nodularity, graphite size, microstructure verification
Brinell Hardness Tester
Material hardness verification
Furnace-Front Analyzer
Melt / process real-time control
Shop-Floor Gauges
Calipers, height gauges, thread gauges for in-process control
Quality Documentation
Complete documentation package covering development, process control, and acceptance review — matched to your OEM requirements.
APQP / PPAP Package
Covering feasibility analysis, cross-functional development, raw material confirmation, MSA plan, packaging development, and approval documentation.
Full Dimensional Report
For critical and general dimension verification on samples/projects, helping customers quickly assess geometric conformance.
Material & Metallography Reports
Chemical composition, hardness, metallographic structure verification results supporting material reliability review.
Control Plan & Corrective Action
Defining process control points, inspection frequency, reaction plans, and closed-loop handling of quality issues.
Sample Quality Dossier
Material Test Report
Full Dimensional Report
Source Inspection Report
8D Corrective Action
Full Batch Traceability
For automotive OEMs and demanding industrial projects, quality is not just inspection results — it includes the ability to trace back to material, batch, process, and shipment records.
- Raw material lot linked to project batch
- Permanent or batch marking per project requirements
- First / in-process / final inspection records retained
- Packaging and shipment records linked to batch ID
Traceability Chain
Batch Traceable
100% Visual Inspection
Documentation per Project
Critical Characteristics Monitored
Packaging & Pre-Shipment Inspection
Protecting part condition on arrival, maintaining batch identity, ensuring smooth receiving at your warehouse.
Domestic / OEM Packaging
- Sorted and packed per project requirements
- Batch marking and quantity verification
- Appearance and packaging condition confirmed before transport
- Suitable for standard OEM / domestic delivery
Export Packaging
- Individual protective wrapping or VCI paper
- Anti-rust / anti-impact / anti-scratch protection
- Executed per carton spec / weight / marking requirements
- Packaging spec and batch info confirmed before dispatch
Pre-Shipment Inspection
Materials & Quality FAQ
What materials does Ktech Casting work with?+
How do you verify material quality?+
Do you provide PPAP documentation?+
How is batch traceability maintained?+
Can you support customer source inspections?+
Need Material or Quality Review?
Request a sample quality dossier, or discuss your project's material, dimensional, leak-test, cleanliness, and documentation requirements.