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| Brand Name: | DLX |
| Model Number: | Inconel Alloy |
| Payment Terms: | L/C,T/T,Western Union |
| Supply Ability: | 500 tons per month |
Precision alloy wire from Changzhou DLX Alloy Co., Ltd. covers three essential functional material families — soft magnetic alloys, expansion alloys, and elastic alloys — each engineered for applications where conventional metals cannot deliver the required physical properties. Whether you need ultra-high magnetic permeability for sensitive transformer cores, precisely matched thermal expansion for hermetic glass-to-metal seals, or exceptional elastic stability for precision instrument springs, our 10-grade precision alloy wire is manufactured through controlled melting, multi-pass cold drawing, and optimized heat treatment to deliver the magnetic, thermal, and mechanical properties your design demands. Full EN 10204 3.1 MTC traceability on every spool.
| Family | Grade | Key Property | Best For |
|---|---|---|---|
| Soft Magnetic Alloys | 1J79 | Ultra-high initial permeability; very low coercivity | Precision transformer cores, magnetic shielding, sensitive relay components, recording heads |
| 1J33 | High permeability; high saturation induction; good temperature stability | Pulse transformers, magnetic amplifiers, current sensor cores, solenoid components | |
| 3J01 | High saturation induction; precipitation hardenable for structural strength | Rotors in precision motors, magnetic pole pieces requiring mechanical strength | |
| Expansion Alloys | 4J29 (Kovar) | Thermal expansion matched to borosilicate glass | Glass-to-metal seals, transistor headers, hermetic microwave packages, reed switch leads |
| 4J33 | Thermal expansion matched to alumina ceramics | Ceramic-to-metal seals, high-power vacuum tube feedthroughs, semiconductor packaging | |
| 4J45 | Thermal expansion matched to soft glass | Soft glass seals, incandescent lamp lead wires, CRT electron gun components | |
| Invar36 | Near-zero thermal expansion below Curie point (~230°C) | Precision measuring instruments, laser resonator frames, thermostat bimetals, LNG tank membranes | |
| 4J32 | Ultra-low expansion; good thermal conductivity | Precision length standards, microwave cavity resonators, optical mounts requiring dimensional stability | |
| FeNi50 | Moderate expansion; good glass wetting | Soft glass sealing applications requiring a lower-cost alternative to higher-nickel grades | |
| Elastic Alloy | 3J9 | High elastic limit; excellent fatigue resistance; low internal friction | Precision elastic elements — diaphragms, bellows, tuning fork resonators, pressure sensor capsules |
Not sure which grade? Tell us your required magnetic permeability, thermal expansion coefficient, or elastic modulus target — our technical team recommends the optimal grade and heat treatment within 24 hours.
| Property | 1J79 (Permalloy-type) | 1J33 | 3J01 |
|---|---|---|---|
| Initial Permeability (μ₀) | ≥20,000 | High | Moderate |
| Maximum Permeability (μₘₐₓ) | ≥100,000 | ≥30,000 | Moderate |
| Coercivity (Hc) | ≤2.4 A/m | Low | Moderate |
| Saturation Induction (Bs) | ~0.75 T | ~1.3 T | ~1.2 T |
| Curie Temperature | ~450°C | ~500°C | ~500°C |
| Best Use Case | Maximum sensitivity — weak signal detection, precision transformers | High-power magnetic circuits — pulse transformers, inductors | Rotating magnetic components — motor rotors, resolver cores |
For maximum magnetic performance, soft magnetic alloy wire must be annealed after forming in a controlled-atmosphere or vacuum environment. Our technical team can provide recommended annealing parameters for your specific component geometry.
| Grade | Expansion Coefficient (*10⁻⁶/°C) | Temperature Range | Matched To |
|---|---|---|---|
| 4J29 (Kovar) | 4.6–5.2 (20–400°C) | −80 to 450°C | Borosilicate glass (Pyrex-type); alumina ceramics |
| 4J33 | 6.0–6.8 (20–400°C) | −60 to 500°C | High-alumina ceramics (95%+ Al₂O₃) |
| 4J45 | 7.8–8.8 (20–400°C) | −60 to 450°C | Soft soda-lime glass |
| Invar36 | ≤1.5 (20–100°C) | −200 to 230°C | Near-zero expansion applications; structural Invar for dimensions-critical assemblies |
| 4J32 | ≤1.0 (20–100°C) | −60 to 200°C | Ultra-low expansion demands; optical and microwave components |
| FeNi50 | 9.2–10.0 (20–400°C) | −60 to 450°C | Soft glass; lower-cost alternative to 4J45 |
Changzhou DLX Alloy Co., Ltd. was founded in 2002 with a single focus: nickel-based specialty alloys. Our precision alloy wire capability spans soft magnetic, expansion, and elastic alloy families — materials where chemistry control and consistent processing directly determine functional performance.
Source: DLX Alloy product catalog. EN 10204 3.1 MTC with full composition included on every shipment.
| Item | 1J33 | 3J01 | 3J9 | 4J29 | 4J32 | 4J33 | 4J45 | FeNi50 | Invar36 | 1J79 |
|---|---|---|---|---|---|---|---|---|---|---|
| C | ≤0.05 | ≤0.05 | 0.22–0.26 | ≤0.03 | ≤0.05 | ≤0.05 | ≤0.05 | ≤0.05 | ≤0.1 | ≤0.03 |
| Mn | 0.30–0.6 | ≤1.0 | 1.80–2.20 | ≤0.5 | 0.2–0.6 | ≤0.5 | ≤0.8 | ≤0.8 | ≤0.5 | 0.6–1.1 |
| Fe | Bal. | Bal. | Bal. | Bal. | Bal. | Bal. | Bal. | Bal. | Bal. | Bal. |
| P | ≤0.020 | ≤0.020 | ≤0.03 | ≤0.02 | ≤0.02 | ≤0.02 | ≤0.02 | ≤0.02 | ≤0.006 | ≤0.02 |
| S | ≤0.020 | ≤0.020 | ≤0.020 | ≤0.02 | ≤0.02 | ≤0.02 | ≤0.02 | ≤0.02 | ≤0.04 | ≤0.02 |
| Si | 0.30–0.6 | ≤0.80 | 1.30–1.70 | ≤0.3 | ≤0.2 | ≤0.3 | ≤0.3 | ≤0.3 | ≤0.35 | 0.3–0.5 |
| Ni | 32.8–33.8 | 34.5–36.5 | 9.0–10.5 | 28.5–29.5 | 31.5–33.0 | 32.1–33.6 | 44.5–45.5 | 49.5–50.5 | 35–38 | 78.5–80.0 |
| Al | 1.0–2.0 | 1.0–1.8 | — | — | — | — | ≤0.1 | ≤0.1 | — | — |
| Co | — | — | — | 16.8–17.8 | 3.2–4.2 | 14.0–15.2 | — | — | — | — |
| Ti | — | 2.7–3.2 | — | — | — | — | — | — | — | — |
| Cu | — | — | — | ≤0.2 | 0.4–0.8 | — | — | — | — | ≤0.2 |
| Cr | — | 11.5–13.0 | 19.0–20.5 | ≤0.2 | — | — | — | — | — | — |
| Mo | — | — | 1.60–1.85 | ≤0.2 | — | — | — | — | — | 3.8–4.1 |
| Wire Diameter | 0.5–7.5 mm (per DLX Precision Alloy catalog Wire range) |
| Available Grades | 1J33, 3J01, 3J9, 4J29, 4J32, 4J33, 4J45, FeNi50, Invar36, 1J79 |
| Product Forms | Wire (0.5–7.5mm), Rod/Bar (8.0–200mm), Strip (0.5–2.5)*(5–180mm), Tube & Plate (Custom) |
| Delivery Condition | Annealed, cold drawn (per grade and application requirement) |
| Surface Finish | Bright, oxide, coated (per customer requirement) |
| Packaging | Spooled on plastic or wooden reels; vacuum-sealed with desiccant |
| Testing | OES chemical analysis, diameter inspection, surface quality; magnetic / expansion / mechanical testing per order |
| Stage | Test / Inspection | Standard |
|---|---|---|
| Melting | OES chemical analysis — tight targeting within grade specification | In-house / GB/T |
| Hot rolling / rod | Surface inspection, diameter check | In-house process spec |
| Cold drawing | In-line diameter monitoring at each pass, intermediate annealing verification | ± tolerance per diameter |
| Post heat treatment | Functional property verification per grade: magnetic permeability (soft magnetic), expansion coefficient (expansion), elastic modulus (elastic) | Per grade specification |
| Final spool | Eddy current (if specified), visual inspection, dimensional audit, spool tension check | Per order specification |
| Documentation | EN 10204 3.1 MTC, functional property test reports (if specified), certificate of conformance | ISO9001 |
Third-party inspection by SGS, BV, or TÜV available upon request. All shipments fully documented and traceable to heat number.
| Spool Types | Plastic reels (D55–D400) or wooden reels per customer specification |
| Packaging | Vacuum-sealed with desiccant, individually boxed; bulk orders on wooden pallets |
| Spool Label | Grade, heat number, diameter, net weight, DLX traceability code |
| MOQ | Negotiable per grade and diameter; trial quantities supported for first-time buyers |
| Lead Time | 3–7 days for stock items; 15–30 days for custom production orders |
| Shipping | Air freight (DHL, FedEx), sea freight (FCL/LCL), or customer-designated forwarder |
| Payment | T/T, L/C at sight |
Soft magnetic grades (1J79, 1J33, 3J01) require final hydrogen or vacuum annealing after winding or forming to develop full magnetic properties. Typical annealing: 1100–1200°C in dry hydrogen or vacuum, slow cool. Our technical team can provide specific parameters for your component geometry and target permeability.
4J29 (Kovar) for borosilicate hard glass (Pyrex-type). 4J45 or FeNi50 for soft soda-lime glass. 4J33 for alumina ceramic seals. The critical factor is matching thermal expansion curves through the glass setting temperature range. Provide your glass or ceramic type and we confirm the optimal grade.
Yes. Invar36 wire can be supplied with thermal expansion coefficient measurement data over your specified temperature range. Our standard certification includes EN 10204 3.1 MTC chemical analysis; expansion coefficient certification is available on request.
Trial quantities are supported for all precision alloy grades and diameters. We encourage first-time buyers to validate magnetic, expansion, or elastic performance in their specific component before committing to production volumes.
Yes. 3J9 elastic alloy wire is available for precision elastic components requiring high elastic limit, excellent fatigue resistance, and low internal friction. Typical applications: pressure sensor capsules, bellows, tuning fork resonators, and precision instrument springs. Specify your required diameter and delivery condition.
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