ISO9001 & SGS Certified | Since 2002 | 12,000 m² Factory | Ni200 4P 49.5mm | 3–7 Day Ship
Ni200 4P Anti-Corrosive Nickel Strip — 99.6% Solid Nickel, Zero Rust in Humid & Coastal 18650 Pack Environments
Product Overview
Corrosion inside a battery pack does not announce itself. A nickel-plated steel strip looks fine at final QC — bright, clean, passing the continuity test. Twelve months later, in a coastal climate with 80% average humidity, the micro-cracks that formed at every spot weld have let moisture reach the steel core. Rust bridges across the cell terminals. Internal resistance climbs. The BMS trips. The pack comes back under warranty. DLX's Ni200 4P strip eliminates this failure at the material level: 99.6% minimum nickel, solid through the entire cross-section, with no steel substrate to corrode. Stamped at 19.5mm pitch, 49.5mm width for standard 18650 layouts, hydrogen-annealed to a bright finish that requires no pre-cleaning — just load, index, and weld.
Core Advantages
Solid Ni200 — No Plating, No Substrate, No Hidden Corrosion Path Nickel-plated steel is a composite: a thin nickel layer over a corrosion-prone steel core. Every spot weld micro-cracks that plating at the heat-affected zone. Every forming bend strains it. Every handling scratch exposes steel. Solid Ni200 has no layers to separate — the nickel that resists corrosion at the surface is the same nickel at the core. Twelve months of humidity exposure produces a passive oxide film nanometers thick on pure nickel. On plated steel, it produces rust that increases contact resistance and triggers BMS faults.
96-Hour Salt Spray Verified — Not Assumed, Tested DLX runs ASTM B117 neutral salt spray (5% NaCl, 35°C) on sample strips from every production batch for 96 continuous hours. Acceptance criteria: zero red rust, zero visible pitting at 10* magnification. Nickel-plated steel control coupons are run alongside for comparison. The difference is documented, not claimed — and available with your shipment.
19.5mm Pitch * 49.5mm Width — The Industry-Standard 4P Footprint This geometry fits the vast majority of 4P 18650 cell holders, welding jigs, and automated assembly fixtures on the market. Pitch held to ±0.05mm across all four positions, overall width to ±0.1mm. No adapter plates, no jig modifications, no "close enough" — the strip indexes into your existing tooling and your electrode fires on center every time.
Low Gas Volume — Safe for Sealed Pack Enclosures Commodity nickel strip can carry residual drawing lubricant that volatilizes inside a sealed battery enclosure during thermal cycling — depositing a thin film on cell vents, BMS contacts, and internal surfaces. DLX hydrogen-anneals every strip at 850–950°C in a controlled atmosphere, decomposing all organic residues. FTIR spectroscopy on random spool samples verifies zero detectable hydrocarbon peaks before release.
Nickel-Only Facility — Your Anti-Corrosive Specification Is Not Compromised by the Previous Job In a mixed-metal factory, the slitting line that ran carbon steel this morning runs your nickel strip this afternoon — carrying microscopic iron particles into your product. DLX processes only nickel and nickel alloys. There is no steel on the premises, no iron contamination in the tooling, and no galvanic couple seeded into your strip at the point of manufacture.
Grade Selection & Reference Price Guide
| Grade |
Ni Content |
Corrosion Performance |
Recommended Environment |
Reference Price (FOB, USD/kg) |
| N4 |
≥ 99.9% (Ni+Co) |
Maximum — Fe ≤ 0.04% eliminates localized corrosion initiation sites |
Marine, coastal, tropical outdoor — condensing humidity year-round |
62 – 70 |
| Ni200 |
≥ 99.6% |
Excellent — the industry standard for anti-corrosive battery interconnects |
E-mobility, outdoor power equipment, humid indoor environments |
54 – 60 |
| Ni201 |
≥ 99.0% (C ≤ 0.02%) |
Very good — low-carbon for thermal cycling without sensitization |
Fast-charge packs, high-temperature industrial modules |
50 – 57 |
| N6 |
≥ 99.5% (Ni+Co) |
Good — indoor/controlled-climate environments |
UPS, indoor energy storage, climate-controlled telecom |
38 – 45 |
Prices FOB Shanghai for 5–500 kg orders. Volume pricing for annual contracts. MOQ: 5 kg. Free sample of Ni200 (0.5 kg) for salt-spray validation. Standard 4P / 19.5mm / 49.5mm in stock.
Chemical Composition
| 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.
Mechanical & Physical Properties
| Property |
Value |
Unit |
| Tensile Strength (Rm) |
≥ 462 |
MPa |
| Elongation (A5) |
≥ 35 |
% |
| Hardness |
90 – 120 |
HB (soft annealed) |
| Density |
8.908 |
g/cm³ |
| Melting Point |
1435 – 1455 |
°C |
| Electrical Resistivity (20°C) |
0.096 |
μΩ·m |
| Thermal Conductivity |
70.2 |
W/m·K |
| Salt Spray Resistance (ASTM B117, 96h) |
Zero red rust, zero pitting at 10* — verified per batch |
| Spot Weldability |
Excellent — 8–12 Ws, consistent nugget diameter ≥ 1.2mm |
| Magnetism |
Ferromagnetic |
Source: DLX Alloy product catalog. Salt spray data from internal batch qualification. Full MTC with each shipment.
Product Specifications
| Parameter |
Standard |
Notes |
| Grade |
Ni200 (99.6% Ni) |
N4, N6, Ni201 available on request |
| Configuration |
4P |
Four cells in parallel per connector |
| Overall Width |
49.5 mm |
±0.1 mm; standard 4P footprint |
| Pitch Distance |
19.5 mm |
±0.05 mm across all four positions |
| Thickness |
0.10 / 0.15 / 0.20 mm |
±0.01 mm per gauge |
| Surface |
Bright (H₂ annealed) |
Oxide-free, ready to weld |
| Edge |
Burr-free (< 0.01 mm) |
Wire-EDM slit, safe for cell wrappers |
| Package |
Spool + carton / coil + polybag |
VCI paper interleave |
| MOQ |
5 kg |
Free 0.5 kg sample for salt-spray evaluation |
Quality Assurance — Anti-Corrosive Verification Protocol
- Melt chemistry. Full OES on every heat. Ni200 minimum 99.6% Ni verified. Fe, Cu, Cr within specification before strip enters production.
- Salt spray test (ASTM B117). Sample strips from every production batch exposed to 5% NaCl at 35°C for 96 continuous hours. Acceptance: zero red rust, zero visible pitting at 10*. Nickel-plated steel control run alongside.
- Pitch & width verification. Optical comparator at 20* on first-article and every 500 meters. 19.5mm ±0.05mm pitch, 49.5mm ±0.1mm width. Die re-indexed if drift exceeds half tolerance.
- Burr inspection at 10*. Edges sampled at start, middle, and end of each slitting campaign. Burr > 0.01mm triggers tool change and coil re-inspection.
- Surface cleanliness (FTIR). Random spool samples scanned for hydrocarbon residue. Zero detectable peaks above baseline required — critical for sealed pack environments.
- Spot weld pull test. ≥ 15 N peel force per weld at 10 Ws on 18650 cell cap. Batch held until results pass.
Packaging & Delivery
- Spooled (≤ 40 kg): DIN 200/300mm ABS spools, acid-free tissue interleave, vacuum-sealed in anti-static PE, individual carton with desiccant. Max 20 spools per master carton.
- Bulk coil (> 40 kg): Steel-core spools, VCI paper + PE wrap, nylon-strapped, plywood case with foam edge protection.
- Labeling: Heat number, grade (Ni200), 4P / 19.5mm / 49.5mm, thickness, net weight, wind direction arrow on every unit. EN 10204 3.1 MTC in external pouch.
Delivery: 3–7 working days for standard configuration from stock. Air freight < 30 kg; sea freight for bulk. Departure: Shanghai.
About DLX — Corrosion Is a Material Problem, Not a Coating Problem
Changzhou DLX Alloy Co., Ltd. takes the position that anti-corrosive performance should be engineered into the metal, not sprayed onto it. Since 2002, our 12,000 m² nickel-only facility in Changzhou has produced solid nickel strip — not nickel-plated steel, not nickel-clad copper — for battery manufacturers who cannot afford corrosion-related field failures. Every production batch is sampled for 96-hour ASTM B117 salt spray exposure, with plated-steel controls run alongside so the difference is measured, not assumed. This testing discipline, combined with ISO9001-certified processes and EN 10204 3.1 material certification per heat, means the "anti-corrosive" on our label is a verified specification — not a marketing adjective. Serving 40+ countries at 500 tons monthly capacity.
Frequently Asked Questions
Q: How can I verify that this Ni200 strip is genuinely anti-corrosive?
Request a sample and run your own salt spray test — or review ours. DLX includes ASTM B117 salt spray results (96 hours, 5% NaCl, 35°C) for every production batch upon request. We also run nickel-plated steel control coupons from a commercial source alongside our Ni200 samples, so you can see the quantitative corrosion difference under identical test conditions. Zero red rust on Ni200 after 96 hours is the standard; plated steel typically shows rust spots at weld points within 24–48 hours.
Q: What happens to Ni200 strip in a genuinely marine environment — not just a salt spray chamber?
Pure nickel in a marine atmosphere forms a thin, adherent nickel oxide/hydroxide passive film that is chemically stable and self-limiting — it grows to a few nanometers and stops. Unlike iron oxide (rust), which is porous, voluminous, and continuously propagates, nickel's passive film is dense and protective. This is the same mechanism that makes Monel (Ni-Cu) propeller shafts survive decades in seawater. For 18650 packs deployed on fishing vessels, coastal telecom towers, or tropical outdoor ESS cabinets, solid Ni200 strip will not rust.
Q: Does hydrogen annealing affect the anti-corrosive property?
Yes — positively. Hydrogen annealing at 850–950°C chemically reduces any surface nickel oxide formed during rolling and slitting back to pure metallic nickel. It also decomposes and volatilizes organic lubricant residues. The result is a chemically clean, oxide-free surface that forms its natural passive film uniformly — without the uneven oxide patches that can act as local corrosion initiation sites on non-annealed strip.
Q: Is Ni200 anti-corrosive enough, or should I upgrade to N4?
For 95% of 18650 pack environments — including outdoor e-mobility, power tools used in humid conditions, and coastal-installed ESS — Ni200 at 99.6% Ni provides more than adequate corrosion protection. Upgrade to N4 (99.9% Ni, Fe ≤ 0.04%) only if your packs are deployed in continuous salt-spray conditions (offshore, marine vessel, tropical coastal with no enclosure) or if trace iron is unacceptable for your application's specification. The cost premium for N4 is approximately 15–20%.
Q: Can I get this anti-corrosive strip in custom dimensions?
Yes. The same Ni200 chemistry is available in any width from 5–240mm, any thickness from 0.05–1.0mm, and any pitch from our standard die library (18.5/19.0/19.5/20.2/20.5mm) or custom-tooled to your specification. Custom tooling lead time is 10–12 working days via our in-house Sodick EDM shop. MOQ remains 5 kg regardless of whether the dimensions are standard or custom.
