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| Brand Name: | DLX |
| Model Number: | Pure Nickel |
| MOQ: | 15KG |
| Payment Terms: | L/C,D/A,D/P,T/T,Western Union |
| Supply Ability: | 500 tons per month |
Most capillary suppliers ship standard 1-meter or 3-meter lengths and expect you to cut them yourself. That works for commodity plumbing. It does not work when you are building 200 identical gas chromatography sample loops, each requiring a 247mm ±1mm nickel capillary with flared ends — and your production schedule cannot absorb an extra cutting, deburring, and QC step. DLX ships custom-cut nickel capillary to your exact specified length, in round, square, or flat profile, from N4, N6, Ni200, or Ni201. Every piece arrives cut, deburred, and individually packaged — ready from receiving to assembly with no in-house processing, no scrap, and no dimensional variation across the batch.
| Parameter | Round | Square | Flat / Rectangular |
|---|---|---|---|
| Outer Dimension | OD 0.5 – 6.0 mm | Side 1.0 – 4.0 mm | Width * Height — custom |
| Inner Dimension | ID 0.3 – 5.0 mm | Hole 0.5 – 3.0 mm | Hole — custom |
| Wall Thickness | 0.1 – 0.5 mm | 0.15 – 0.5 mm | 0.15 – 0.5 mm |
| Length | Custom-cut to specification, ±1 mm cut tolerance; max 6 m per piece | ||
| Tolerance (OD / Side) | ±0.05 mm | ±0.05 mm | ±0.10 mm |
| Delivery Condition | Cold-drawn, bright hydrogen-annealed; polished finish available | ||
All profiles available in N4, N6, Ni200, Ni201. Specify OD/ID/profile/length at inquiry — feasibility confirmed within 24 hours. Orders of 100+ custom-cut pieces ship with a batch dimensional inspection report.
| Criteria | Round | Square | Flat / Rectangular |
|---|---|---|---|
| Fluid Flow Efficiency | Optimal — lowest ΔP per unit cross-section | ~10% higher ΔP at equal flow area — corner friction | Higher velocity → higher ΔP — narrower channel |
| External Heat Transfer | Baseline — π * OD | ~27% more than round at equal hydraulic diameter | Highest — large flat surface for planar heat sources/sinks |
| Space-Constrained Fit | Requires round bore or clamp | Self-aligning in square slots; stacks cleanly | Ideal for narrow planar cavities and laminated assemblies |
| Minimum Bend Radius | ~2* OD (no mandrel) | ~2.5* side (flat face); harder across corner | 3–4* thin dimension minimum |
| Typical Application | GC columns, chemical dosing, pneumatic lines | Heat exchangers, thermal management blocks, sensor housings | Medical device conduits, compact instrument slots, cooling plates |
| Material | Thermal Conductivity (W/m·K) | Corrosion in Humid Air | Ion Leaching in High-Purity Media | Max Service Temp |
|---|---|---|---|---|
| Nickel 200 | 70.2 | None — passive oxide, nanometres thick | Negligible — stable oxide; no Cu²⁺ release | 600°C |
| Copper (C11000) | 388 | Oxidizes — Cu₂O/CuO scale degrades conductivity | Significant — Cu²⁺ release; catalytic in organic streams | 200°C (rapid oxidation above) |
| 316L Stainless | 16.3 | Resistant; pitting in Cl⁻ humidity | Low — Fe/Cr/Ni ions detectable at ppb level | 870°C |
| Aluminum 6061 | 167 | Al₂O₃ passivation — galvanic risk | Not suitable — Al³⁺ release; reactive with acids/alkalis | 200°C (strength loss above) |
Nickel 200 thermal conductivity from DLX product catalog. Nickel occupies the practical middle ground: 4.3* more conductive than 316L, without copper's oxidation, ion leaching, and catalytic activity risks in sensitive analytical and medical fluid systems.
| Standard | Title | Relevance |
|---|---|---|
| ASTM B163 | Seamless Nickel and Nickel Alloy Condenser and Heat-Exchanger Tubes | Primary standard — directly governs seamless nickel capillary for pressure-boundary and heat-transfer service |
| ASTM B161 | Nickel Seamless Pipe and Tube | Reference for larger-diameter, heavier-wall seamless nickel tube |
| ASTM B725 | Welded Nickel and Nickel-Copper Alloy Tube | Reference for welded alternative; DLX capillary is seamless and exceeds this standard |
| EN 10204 3.1 | Metallic Products — Types of Inspection Documents | Material Test Certificate per heat — included with every shipment |
| Grade | Ni Content | Best Specialized Application | Reference Price (FOB, USD/kg) |
|---|---|---|---|
| Ni200 | ≥ 99.6% | Standard — GC columns, chemical dosing, thermal management capillary | 56 – 64 |
| Ni201 | ≥ 99.0% (C ≤ 0.02%) | High-temperature — furnace sample lines, aerospace sensor conduits above 315°C | 60 – 68 |
| N4 | ≥ 99.9% (Ni+Co) | Ultra-pure — medical implants, semiconductor gas delivery, mass spectrometry inlets | 76 – 86 |
| N6 | ≥ 99.5% (Ni+Co) | Cost-effective — general industrial fluid transfer, pneumatic logic control lines | 46 – 54 |
Prices FOB Shanghai, 5–500 kg orders. Volume pricing for annual contracts. MOQ: 5 kg. Free sample (0.5 kg Ni200) for cut-length and dimensional evaluation. Standard delivery 3–7 working days for in-stock dimensions; 7–15 days for custom profiles.
| Element | N4 | N6 | Ni200 | Ni201 |
|---|---|---|---|---|
| Ni+Co | ≥ 99.9% | ≥ 99.5% | — | — |
| Ni | — | — | ≥ 99.2% | ≥ 99.0% |
| Cu | ≤ 0.015 | ≤ 0.10 | ≤ 0.25 | ≤ 0.25 |
| Si | ≤ 0.03 | ≤ 0.10 | ≤ 0.35 | ≤ 0.35 |
| Mn | ≤ 0.002 | ≤ 0.05 | ≤ 0.35 | ≤ 0.35 |
| C | ≤ 0.01 | ≤ 0.10 | ≤ 0.15 | ≤ 0.02 |
| Mg | ≤ 0.01 | ≤ 0.10 | — | — |
| S | ≤ 0.001 | ≤ 0.005 | ≤ 0.01 | ≤ 0.01 |
| P | ≤ 0.001 | ≤ 0.002 | — | — |
| Fe | ≤ 0.04 | ≤ 0.10 | ≤ 0.40 | ≤ 0.40 |
Source: DLX Alloy product catalog. EN 10204 3.1 MTC with full composition included on every shipment.
| Property | Value | Unit |
|---|---|---|
| Tensile Strength (Rm) | ≥ 462 | MPa |
| Elongation (A5) | ≥ 35 | % |
| Hardness | 90 – 120 | HB (annealed) |
| Shear Modulus | ~ 76 | GPa |
| Density | 8.89 | g/cm³ |
| Melting Point | 1435 – 1446 | °C |
| Curie Temperature | 358 | °C |
| Max Service Temperature | 600 | °C |
| Specific Heat | 456 | J/kg·°C |
| Electrical Resistivity (20°C) | 0.096 * 10⁻⁶ | Ω·m |
| Thermal Conductivity | 70.2 | W/m·K |
| CTE (20–100°C) | 13.3 * 10⁻⁶ | m/m·°C |
| Tube Construction | Seamless — cold-drawn over mandrel, no longitudinal weld | |
| Available Profiles | Round, Square, Flat | |
| Material Standard | ASTM B163; B161, B725 for reference | |
Source: DLX Alloy product catalog. Curie temperature 358°C from published nickel physical property data. EN 10204 3.1 MTC with each shipment.
| Parameter | Standard Range | Notes |
|---|---|---|
| Grades | Ni200, Ni201, N4, N6 | Pure nickel — no alloy additions |
| Profiles | Round, Square, Flat | Specify at inquiry |
| OD / Side Dimension | Round 0.5–6.0 mm; Square 1.0–4.0 mm | ±0.05 mm tolerance |
| Wall Thickness | 0.1 – 0.5 mm | ±8% circumferential variation |
| Cut Length | Custom to ±1 mm; max 6 m per piece | ±0.5 mm available on request |
| Surface Finish | Bright (H₂ annealed), Polished | Specify at inquiry |
| End Condition | Square cut, deburred | Flared/swaged ends on request |
| Package | Individual PE sleeve + carton / case | Batch inspection report for 100+ pieces |
| MOQ | 5 kg | Free sample for cut-length validation |
Delivery: 3–7 working days for in-stock dimensions and standard cut lengths. Custom profiles or non-stock OD/wall: 7–15 days. Air freight < 30 kg; sea freight for bulk. Departure: Shanghai.
Changzhou DLX Alloy Co., Ltd. draws its own seamless nickel capillary — and then cuts it. Most capillary suppliers stop at the mill length and leave cutting to the customer. Since 2002, our 12,000 m² nickel-only facility in Changzhou has invested the same discipline at the cutting station as at the drawing bench: calibrated digital length gauging, batch-level statistical inspection reporting, and individual piece traceability to a single melt heat. Whether your order is 50 pieces at 247mm for a gas chromatography OEM or 2,000 pieces at 32mm for a medical device manufacturer, every piece leaves our facility within tolerance — and arrives at yours ready to install. ISO9001 certified, 500 tons monthly capacity, serving specialized manufacturers across 40+ countries.
Standard cut tolerance is ±1 mm, verified with calibrated digital calipers on first-article and every 50th piece. Tighter tolerance of ±0.5 mm is available with 100% length verification. Orders of 100+ custom-cut pieces ship with a batch dimensional inspection report showing min, max, and mean length across the inspected sample.
Square capillary increases external heat transfer surface by ~27% compared to round at equal hydraulic diameter — choose it for thermal management blocks and heat exchanger arrays. Flat capillary fits into narrow planar slots in laminated assemblies — choose it when height is the constraint. If your primary requirement is fluid flow with minimal pressure drop, round is optimal. See the Profile Selection Guide table above for full comparison.
Yes. DLX seamless capillary has a cold-drawn ID with no longitudinal weld seam — no crevice to trap sample residue. As-drawn surface roughness (Ra) is typically 0.4–0.8 μm, and hydrogen annealing removes all lubricant residue. Electropolished ID (Ra < 0.2 μm) is available as a secondary process — specify at inquiry.
Yes. A single order can contain multiple cut-length specifications — for example, 100 pieces at 150mm and 200 pieces at 320mm, all from the same grade and OD/wall. Each length is batched, labeled, and inspected separately. One EN 10204 3.1 MTC covers the chemistry; separate batch inspection reports per length.
Copper conducts heat 5.5* better (388 vs 70.2 W/m·K) but oxidizes above 200°C, leaches Cu²⁺ into aqueous streams, and catalyzes organic reactions. Nickel at 70.2 W/m·K is 4.3* more conductive than 316L stainless (16.3 W/m·K) — enough for most thermal management duties without copper's material compatibility problems. See the Thermal Conductivity Comparison table above for full data.
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