Technische gegevens
Reference data for engineers and buyers specifying continugieten copper gietvorm buizen and gietvorm components: material properties, conus design, chrome plating, tolerances, koeling, inspection and an ordering checklist. Values are typical unless a op maater standard is agreed.
Copper Materiaal Properties
Typisch values for the three copper grades used in our gietvorm buizen. Exact figures depend on material condition, heat treatment and the applicable standard; certified values are supplied with the material certificate.
| Property | TP2 / Cu-DHP | CuAg0.1 | CuCrZr |
|---|---|---|---|
| Designation | Phosphorus deoxidized copper (C12200 / CW024A) | Silver-bearing copper (C10700-type) | Chromium zirconium copper (C18150 / CW106C) |
| Main alloying element | P 0.015–0.040 % | Ag 0.08–0.12 %, P 0.004–0.012 % | Cr 0.30–1.20 %, Zr 0.03–0.30 % |
| Thermal conductivity (20 °C), typical | ≈ 330–350 W/m·K | ≈ 360–380 W/m·K | ≈ 300–330 W/m·K |
| Electrical conductivity, typical | ≈ 85–90 % IACS | ≈ 95–98 % IACS | ≈ 75–85 % IACS |
| Softening / recrystallization temperature | ≈ 250–320 °C | ≈ 330–380 °C | ≈ 450–500 °C |
| Hardness (working condition), typical | ≈ 80–110 HB | ≈ 85–115 HB | ≈ 120–160 HB |
| Tensile strength, typical | ≈ 250–320 MPa | ≈ 260–330 MPa | ≈ 400–500 MPa |
| Density | 8.9 g/cm³ | 8.9 g/cm³ | 8.9 g/cm³ |
| Strengthening | Cold work | Cold work + Ag solid solution | Precipitation hardening (Cr, Zr) |
| Typisch use | Standaard knuppel casting | High casting speed, higher thermal load | Bloom gietvormen, long campaigns, gietvorm plates |
Ranges compiled from published copper alloy data; not a guarantee. Specify your required standard (GB, EN, ASTM) in the order.
Internal Conus Design
The staal shell shrinks as it moves down the gietvorm. The buis's inner profile follows that shrinkage so the shell stays in contact with the copper; too little conus reduces heat transfer, too much causes friction and sticking. The conus is machined to your gietmachine's casting speed, section and staal grade.
Single conus
Constant conus, typically 0.6–1.0 %/m. Simple, for lower casting speeds.
Double conus
Steeper near the meniscus, flatter below. Common on knuppel gietmachines.
Multi-conus
Three or more segments approximating the shell shrinkage curve.
Parabolic
Continuous curve matching shrinkage; best for high-speed casting.
Convex / op maat
Convex walls or OEM-specific profiles reproduced from your drawing.
| Parameter | Typisch range / note |
|---|---|
| Total conus (top to exit) | 0.6–1.2 %/m depending on section and speed; larger for small sections and high speed |
| Corner radius | R3–R12 mm typical for knuppel; to drawing |
| Casting radius | R3000–R15000 mm; buis curvature must equal machine radius exactly |
| Meniscus level | Typischly 80–120 mm below buis top; affects conus start |
Inner Oppervlak Bekleding
| Item | Specification |
|---|---|
| Standaard coating | Hard chroom, electrodeposited |
| Thickness | 0.08–0.12 mm (80–120 µm), our standard; 0.06–0.20 mm on request |
| Hardness | ≈ 800–1000 HV |
| Alternative | Nickel-chrome (Ni underlayer + Cr) for longer life and better adhesion |
| Oppervlak finish before plating | Ra ≤ 0.8 µm, polished |
| Coverage | Full working surface, uniform along the buis lengte |
| Re-plating | Worn buizen can be stripped, re-machined and re-plated |
Dimensional Tolerances
| Dimension | Typisch tolerance |
|---|---|
| Inner section (top / exit) | ±0.10 mm |
| Wanddikte | ±0.20 mm |
| Lengte | ±0.5 mm |
| Conus | ±0.05 %/m |
| Casting radius | Deviation ≤ 0.3 mm over buis lengte |
| Straightness / twist | ≤ 0.2 mm |
| Corner radius | ±0.5 mm |
| Binnenoppervlak roughness | Ra ≤ 0.4 µm after plating |
Tighter tolerances available to drawing. Tolerances are verified on a CMM and reported per buis.
Cooling & Water Slots
| Item | Typisch |
|---|---|
| Water gap (buis to jacket) | 3–5 mm annular gap, or machined water slots |
| Water velocity | 6–12 m/s along the buis wall |
| Water flow, knuppel gietvorm | ≈ 80–150 m³/h depending on section |
| Inlet water temperature | ≤ 40 °C; ΔT typically 5–10 °C |
| Water pressure | 0.6–1.0 MPa at the gietvorm |
| Water slots | Number, depth and position machined to gietmachine drawing |
Cooling parameters belong to the gietmachine design; we machine the buis and watermantel to match them.
Inspectie & Documentation
| Item | Method / document |
|---|---|
| Materiaal | Mill certificate; spectrometer check of Cu, P, Ag, Cr, Zr |
| Inner section & conus | CMM measurement at 5+ levels, report per buis |
| Casting radius | Radius gauge / CMM |
| Wanddikte | Ultrasonic or micrometer at 8 points |
| Chrome thickness | Eddy-current / XRF gauge, min. 6 points |
| Oppervlak | Visual + roughness tester (Ra) |
| Hardness | Brinell / Vickers on sample or buis end |
| Water jacket / assembly | Pressure and leakage test, fit check |
| Documents | Inspectie report, material certificate, packing list, photos before packing |
Ordering Checklist
What we need to quote and manufacture a copper gietvorm buis correctly. The marking on your old buis (e.g. "150×150×900 R6000") or the gietmachine drawing usually covers most of it.
- Cast section (mm or inch) and corner radius
- Casting machine radius (R4000 / R5000 / R6000 / R9000 …)
- Tube lengte and meniscus position
- Wanddikte
- Conus type and values, or "as per drawing"
- Copper grade: TP2 / Cu-DHP, CuAg0.1 or CuCrZr
- Bekleding: hard chrome (thickness) or Ni-Cr
- Water slots: number, size, position (or watermantel drawing)
- Top / bottom flange or fixing details
- Casting speed, staal grades, gietmachine OEM and model
- Aantal and required delivery date
- Destination port and Incoterm (FOB / CIF / DAP)
Unit Conversion
100 mm = 3.94 in · 130 mm = 5.12 in · 150 mm = 5.91 in
800 mm = 31.5 in · 812 mm = 32.0 in · 900 mm = 35.4 in
R6000 = 236.2 in (19.7 ft) · R9000 = 354.3 in (29.5 ft)
R10000 = 393.7 in (32.8 ft)
1 W/m·K = 0.578 BTU/(h·ft·°F) · 1 µm = 0.00004 in
°F = °C × 1.8 + 32
Verstuur Your Specification
Fill in what you have from the checklist; send drawings to sales@coppermouldtube.com or WhatsApp. Our engineer confirms the remaining parameters and quotes binnen één werkdag.