Industrial Steel & Metal Products: Applications & Common Installations
Complete Metal Scrap Handbook: A Comprehensive Guide to Profiles, Grades, Valuation & Recycling
1. What Is Metal Scrap?
Metal scrap comprises discarded or off-cut ferrous and non-ferrous items destined for melting and re-refining. Recycling saves up to 75% of the energy versus primary production, diverts waste from landfills, and feeds a global circular economy.
2. Origins & Common Sources
- Construction & Demolition: Structural beams, angles, channels, pipes
- Manufacturing & Fabrication: Bar stock, extrusions, pressings, stampings
- Automotive & Machinery: Rebar, couplings, flanges, radiators
- Consumer & Appliances: Sheet metal, profiled panels, wiring harness
- Packaging & Coils: Rolled sheet, strip, coil stock
3. Global Market & Top Importers
| Country | 2024 Imports (million kg) |
Key Profiles Imported |
|---|---|---|
| China | 4 200 000 | Pipes, angles, channels, rebar |
| India | 1 500 000 | Pipes, sheets, bars |
| UAE | 700 000 | Coils, profiles |
| Turkey | 650 000 | Rebar, sheet, fittings |
| Germany | 550 000 | Channels, sheets |
| USA | 500 000 | Steel scrap, rebar |
4. Classifications & Grades
| Grade | Description | Typical Purity / Condition |
|---|---|---|
| HMS 1 | Clean plate & structural sections >6 mm | Solid, minimal attachments |
| HMS 2 | Plate & structural 3–6 mm | Minor attachments allowed |
| LMS | Light sheet, sections <3 mm | Mixed forms, higher contamination |
| Red Metal | Brass, bronze & copper alloys | Recovered copper content |
| Cast Iron | Engine blocks, pump housings | Brittle, high C content |
| Shredded Scrap | Mixed steel shredded <50 mm | Mixed grades |
5. Valuation, Pricing & Container Logistics
5.1 Pricing & Grade Differentials
- HMS 1 & 2 (heavy plate, structural): 0.15–0.25 KWD/kg
- LMS (thin sheet, light forms): 0.07–0.15 KWD/kg
- HMS–LMS differential: 0.08–0.10 KWD/kg
- Discount Factors:
- HMS 2: ≈ 0.90 × HMS 1
- LMS: ≈ 0.75 × HMS 1
Yard quotes vary with season, region and freight—always secure real-time bids.
5.2 Container Capacities & Loads
| Container | Vol. (m³) | Max Payload (kg) | HMS Load | LMS Load | Notes |
|---|---|---|---|---|---|
| 20′ GP | ≈ 33 | 24 000 | 22 000 kg | 24 000 kg | HMS density ~7 850 kg/m³ (weight-limit binds) |
| 40′ GP | ≈ 67 | 28 000 | 27 000 kg | 28 000 kg | HMS weight-limited; LMS volume-limited |
- HMS density ~7.8 t/m³ – hits weight cap before volume.
- LMS density ~5–6 t/m³ – can fill full volume on 20′.
5.3 Best-Practice Loading Tips
- Weight Distribution: Stow heavy bales low & centered.
- Volume Optimization: Nest thin sheets to reduce voids.
- Palletization: 500–1 000 kg bales for uniform spread.
- Documentation: Record weight, grade, bale count & seal on BOL.
6. Calculations & Formulas
Density of mild steel: 7 850 kg/m³
| Calculation | Formula |
|---|---|
| Mass from Volume | m = V × ρ |
| Volume from Mass | V = m / ρ |
| Pure Metal Mass | mₘₑₜₐₗ = m × (Purity/100) |
| Scrap Value | Value = m × Price × DF |
| % by Weight | (mₘₑₜₐₗ/m)×100 |
7. Handling, Storage & Quality Control
- Segregate by grade; remove non-metals (plastics, concrete, oils).
- Store dry, ventilated to prevent rust and odors.
- Label each bale with weight, grade, source, date.
- Maintain chain-of-custody logs for traceability and audit.
8. Expanded Visual Identification Guide
| Profile | Grades / Standards | Dimensions | Scrap Class | Key Properties |
|---|---|---|---|---|
| Pipe | CS A53/A106, SS 304/316, Galv. A53 | OD 15–600 mm, SCH 10–XXH | HMS 1, HMS 2, Light Iron | 400–550 MPa; 316>304>CS |
| Circle/Square/Hexagon Bar | MS 1018, Alloy 4140, Brass C36000, SS 303 | Ø 5–250 mm; 10–100 mm sq/hex | Cut Structural, Turnings, Red Metal | Yield 350–850 MPa; Brass best machinability |
| Channel/Angle/H-Beam | A36, A572, A588 |
C100×50×5 mm; L50×50×6 mm; H150×150×7×10 mm |
P&S, HMS 1, Pre-painted | Inertia 1 640 cm⁴; 31.1 kg/m |
| Rebar | Grade 40, 60; Epoxy A775 | Various ribbed rods | HMS 2, Concrete-contaminated, Bundled | Rib height 0.05–0.07 mm; bond 2.5–4.5 MPa |
| Profiled/Steel Sheet | Light & HS steel | Corrug. 35 mm; Trap. 60 mm; Perf. 30% | Shred, Pre-painted, Clean Galv. | Z275, AZ150, PVDF; span 1.8 m@1 kN/m² |
| Flange/Fitting | B16.5 weld-neck, Slip-on, Socket, Threaded | Various faces & bolt patterns | Turnings, Cast Iron, SS 304/316 | Class 150:20 bar@200 °C; 300:50 bar |
| Coil/Roll/Grid | Steel coil; Al/FRP grids | W 600–2000 mm; t 0.3–6 mm; ID 508/610 mm | Shred, Extrusion, Clean vs Painted | D400:4 kN; Heavy:10 kN/m² |
Pro Tip: Magnet & spark tests quickly eliminate ferrous and high-carbon contaminants before baling.
9. Technical & Chemical Specifications
| Material | C % | Alloying | Tensile (MPa) | Hardness (HB) |
|---|---|---|---|---|
| Mild Steel (S235) | 0.10–0.25 | Mn, Si | 235 | 85–105 |
| Stainless 304 | <0.08 | 18 Cr, 8 Ni | 505–695 | 170–200 |
| Cast Iron | 2.5–4.0 | Si, C | 150–300 | 180–240 |
10. Sampling & Laboratory Testing
Field Protocol
- Divide load into equal segments.
- Grab samples top, middle, bottom of each segment.
- Combine, homogenize, label.
Quick Field Tests
- Magnet: Steel vs. non-magnetic scrap.
- Spark: Bright long sparks = steel; none = ferrous free.
- Conductivity: Distinguish alloys.
Lab Methods
- XRF (X-Ray Fluorescence)
- OES (Optical Emission)
- ICP-OES
- Wet Chemistry (AAS, titration)
11. Recycling & Refining Processes
Ferrous
- Shredding & magnetic separation.
- Electric-arc or induction furnace melt.
- Deslagging & casting into billets.
Non-Ferrous
- Smelting with fluxes, dross removal.
- Hydrometallurgy: leaching & electrowinning.
12. Environmental & Regulatory Compliance
- Basel Convention for transboundary waste.
- WEEE & ELV directives.
- Local emissions & wastewater permits.
13. Safety, Health & Handling
- PPE: gloves, goggles, respirators.
- Dust & fume extraction.
- Fire risk: separate sparks & flammables.
- Secure stack heights; use strapping.
14. Machinery & Equipment Overview
- Shears, plate cutters, balers, shredders.
- Magnetic & eddy-current separators.
- Induction & arc furnaces.
- Portable XRF analyzers.
15. Logistics & Supply Chain Management
- 20′ (18–22 t) & 40′ (25–28 t) container loading.
- Palletization & strapping to prevent shifting.
- Docs: BOL, Packing List, MTR, Commercial Invoice.
- Incoterms: FOB, CIF, DDP – allocate costs & risks.
16. Pricing History & Market Analysis
| Year | HMS Avg (KWD/kg) | Key Drivers |
|---|---|---|
| 2020 | 0.12 | Lockdowns, demand drop |
| 2021 | 0.18 | Rebound, stimulus |
| 2022 | 0.20 | Energy spike, tight supply |
| 2023 | 0.17 | Oversupply |
| 2024 | 0.19 | Construction uptick |
| 2025 | 0.16 | Normalization |
17. Buyer & Seller Directory
- ArcelorMittal, Nucor, SAIL, EGA, Emirates Steel, Gulf Recycling, National Metals.
18. Digital Transformation & Traceability
- IoT scales & sensors for real-time data.
- ERP & blockchain for batch tracking.
- AI sorting vision systems.
19. Blockchain & Scrap Provenance
- Tokenized bale IDs & quality reports.
- Smart contracts release payment on delivery.
- Regulator interoperability for transparency.
20. Carbon Footprint & Sustainability Credits
- Recycling saves ~1.6 t CO₂-e per tonne steel.
- Earn carbon credits via voluntary schemes.
21. Risk Management & Insurance
- Hedge with futures/options on steel indices.
- Cargo insurance: all-risk, war, general average.
22. Industry Associations & Standards
- ISRI, ISO 9001, ISO 14001, BIS, EU SRM regulations.
23. Pricing Mechanisms & Hedging
- Spot vs. forward contracts linked to global benchmarks.
- Local premiums: transport, processing, seasonality.
24. Market Forecast & Intelligence
Projected 1–2% annual growth in ferrous scrap demand through 2030, driven by renewables, infrastructure and circular mandates.
25. Future Outlook & Innovations
- Advanced shear-shredder hybrids, laser sorting robots, predictive maintenance.
26. Glossary, Acronyms & FAQ
- HMS
- Heavy Melting Steel
- LMS
- Light Melting Steel
- DF
- Discount Factor
- BOL
- Bill of Lading
- MTR
- Material Test Report
FAQs
- Q: Can painted angles fetch structural rates?
- A: No—coatings downgrade to HMS; shot-blast or clean to upgrade.
- Q: How to convert USD/tonne to KWD/kg?
- A: Divide USD/tonne by 1 000 000, multiply by current FX (≈0.306).
