Lead-Free Brass & the RoHS 30 June 2027 Deadline — Engineering Action Plan

For nearly two decades, European brass-fitting customers have relied on RoHS Exemption 6(c) to continue using leaded brass in electrical and electronic equipment. The exemption, which permits copper alloys containing up to 4% lead by weight, has been renewed multiple times since 2003. The latest renewal was issued in September 2025 and extends validity to 30 June 2027. That deadline is now firmly in sight — and any new product platform with a five-year lifecycle is already in the danger zone.

The European Commission has signalled that further renewals are not guaranteed. Engineering teams designing new EEE platforms today need to either qualify lead-free brass alternatives or, where leaded brass is structurally necessary, prepare a renewed Exemption 6(c) submission with technical justification by the December 2025 application deadline. This article maps the practical decision space.

What Exemption 6(c) actually allows

The exemption permits copper alloys with up to 4% lead by weight to be used as a homogeneous material in any electrical or electronic equipment that falls under the scope of RoHS 2 (Directive 2011/65/EU as amended). The relevant text, from Annex III to RoHS 2:

"Lead as an alloying element in copper with a lead content up to 4% by weight."

This single line is the reason CW617N (Pb 1.6–2.5%) and CW614N (Pb 2.5–3.5%) have continued to dominate brass-fitting production for the European market. Without this exemption, every leaded brass fitting in every EEE product would already be non-compliant.

The 30 June 2027 deadline — what happens next

On 1 July 2027, unless Exemption 6(c) is renewed, the general RoHS limit of 0.1% lead by weight in homogeneous materials applies to copper alloys. That limit excludes essentially all standard leaded brass grades:

The four practical options for engineering teams

Option 1: Switch to CW724R or C6802 (lead-free silicon brass)

For most plumbing, electrical, and automotive brass fittings the cleanest answer is to qualify a lead-free silicon brass. CW724R (CuZn21Si3P) is the European reference; C6802 (CuZn17Si4) is the US/ASTM equivalent and is NSF 61 approved for North American drinking water.

Properties to expect when switching from CW617N:

• Machinability drops from 100% to ~80% (CW724R) or ~78% (C6802). Cycle time increases roughly 15–25%.
• Strength is higher (Rm ≥ 600 MPa for CW724R R600 vs 360–470 MPa for CW617N R360).
• Dezincification resistance is intrinsic (no arsenic addition needed).
• Cost per kg typically 10–20% higher.
• Drinking-water approvals — CW724R is WRAS / KIWA / ACS / DVGW approvable; C6802 carries NSF 61.

Option 2: Switch to alpha-brass for cosmetic / non-pressure parts

For brass parts that don't see pressure — door hardware, cosmetic fittings, name plates — alpha brass CuZn37 (CW508L) is the lowest-cost lead-free option. Machinability is ~50% of CW617N so cycle time doubles, but the alloy has excellent cold-formability and zero lead.

Option 3: Switch to pure copper for electrical-conductivity parts

For terminals, busbars, contact pieces and grounding components where electrical conductivity is the primary driver, C11000 (Cu-ETP) is the natural answer. 100% IACS conductivity, zero lead, no exemption required. Machinability drops to ~20%, which makes cost per part higher, but for high-current parts the conductivity gain is worth it.

Option 4: Renewal application for Exemption 6(c)

For specific applications where lead-free alternatives genuinely cannot meet the technical requirement (very high cycle counts, ultra-fine machined features, niche metallurgical needs), the industry can submit a renewal application to the European Commission via Oeko-Institut. The deadline for the next renewal cycle is 31 December 2025. Submissions require technical evidence that lead-free alternatives are not yet feasible, and the resulting exemption is typically time-limited (5 years).

A practical 18-month transition plan

Cost implications for procurement

An order book moving from CW617N to CW724R will see a unit cost increase of approximately 12–22%, broken down as follows:

• Material cost — silicon brass is ~5–8% more expensive per kg than leaded brass
• Cycle time — 15–25% longer on CNC machines
• Tool life — slightly higher tool wear, ~5% additional tooling cost
• Recovery — slightly more difficult swarf recycling (different scrap stream)

For high-volume parts (e.g. plumbing fittings) the cost impact at end-customer level is typically 5–10% of finished-part price. For low-mass / high-content parts the impact is smaller.

Markets already requiring lead-free brass (regardless of RoHS)

Several major markets already require effectively lead-free brass for drinking-water contact, independent of RoHS:

• California (USA) — AB 1953 effective 2010, retroactive 2014: weighted-average Pb ≤ 0.25% for water-contact
• Vermont, Maryland — equivalent state-level Pb laws
• Canada — federal Pb limit ≤ 0.25% for drinking water service since 2014
• France (ACS) — strict migration limits effectively requiring lead-free alloys
• Germany (DVGW W 270) — biofilm growth tests on the alloy itself, favouring silicon brass

For OEMs exporting to multiple markets, qualifying CW724R or C6802 now solves both the 2027 RoHS deadline and the existing drinking-water-market requirements in one step.

Sources & references

• RoHS 2 Directive 2011/65/EU (consolidated text on EUR-Lex)
• Oeko-Institut RoHS exemption review platform — official renewal application platform
• LEMO commentary on the September 2025 renewal
• Copper Development Association RoHS FAQ for copper & brass alloys (PDF)
• European Copper Institute
• Brassland RoHS compliance page

Frequently asked questions

Sources & references

Regulatory references:

Last reviewed: June 2026. Standards and regulatory references are checked at each review.