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Ferrous
Cast Iron (Breakable)
Grade: Various (Foundry-specific)Medium Tier
Antique stoves, pipe, clean engine blocks, light cast material
Market Price EstimateUpdated Daily
$285/ MT
-3 (-1%)vs yesterday
Verified specifications & market data
Chemical Composition
Elemental breakdown by percentage weight.
Standard composition limits
Values represent maximum allowed percentage unless otherwise noted.
Physical Properties
Material form, density, and contamination specifications.
Used, worn-out, or obsolete cast iron items (stoves, engine blocks, pipes, machinery) that are breakable and can be reduced to smaller fragments for foundry remelting
Acceptable Inclusions
- Surface rust and oxidation (inherent to cast iron exposure)
- Light grease/oil residue <1% (previous use)
- Paint coating (post-casting appearance)
- Minor mill scale or sand residue
- Dust from casting break operations <0.5%
Prohibited Materials
- Copper or brass fittings (must be removed)
- Stainless steel components (segregate)
- Mixed steel scrap (contamination)
- Radioactive materials (any detectable)
- PCB or hazardous electronics
- Asbestos materials
- Mercury components
- Whole batteries
- Heavy oil/hydraulic fluid contamination >1%
- Hazardous coatings (lead paint >1%, asbestos)
Quality Assurance
Testing protocols, sampling methods, and acceptance criteria.
Sampling Protocol
frequencyRandom selection from top, middle, bottom layers of load
maximumQuantity50 samples per truck
minimumQuantity1–1.5 tonnes or 20–30 samples
notesCast iron scrap highly variable; robust sampling required
percentage5–10% of lot
Acceptance Limits
all Criteria Must Passcriteria must be met; carbon especially critical
carbon ContentC 2.5–4.0%
iron ContentFe 86–94%
phosphorusP <0.12%
silicon ContentSi 1–3%
sulfurS <0.12%
visual Contaminants<2% non-ferrous metals visible; no brass/copper fittings
Weight Tolerance
notesDense cast iron; weight verification important
variance±3% acceptable from purchase order weight
Required Test Methods
Visual Inspection
Purpose
- Detect non-ferrous metals (copper fittings, brass valves), mixed materials, hazardous items
Acceptance Criteria
- Pass: <2% non-ferrous contamination visible
- no brass/copper fittings
- no hazmat
Procedure
- 100% scan of samples
- look for brass/copper, stainless, fittings, hazmat labels
XRF Spectrometry
Purpose
- Verify carbon 2.5–4%, silicon 1–3%, iron 86–94%, other elements within spec
Acceptance Criteria
- Pass: Carbon in range (critical), silicon in range, iron within tolerance
Combustion Analysis
Purpose
- Precise carbon measurement (XRF estimates
- combustion measures directly)
Acceptance Criteria
- Pass: Carbon 2.5–4% verified by combustion
Procedure
- Test on samples if carbon near specification boundaries
Magnetic Test
Purpose
- Confirm ferrous material
- detect stainless steel contamination
Acceptance Criteria
- Pass: All samples respond to magnet
- no dead zones
Procedure
- Hand magnet test on samples
Density/Weight Check
Purpose
- Verify cast iron authenticity (cast iron denser ~1.3–1.5 t/m³ vs. steel 1.2–1.4)
Acceptance Criteria
- Pass: Lot weight consistent with cast iron density
Procedure
- Calculate bulk density from truck weight and volume