Materials Library

19 Brass & Copper
Alloy Datasheets

From leaded free-machining grades to lead-free DZR, structural, and pure copper alloys — every specification Brassland machines and forges, documented.

📋 19 Alloys
🔬 4 Alloy Families
✅ RoHS Status on Every Grade
🌍 EN · ASTM · JIS Equivalents
📐 Machinability Ratings
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How to use this library

Find the right alloy for your application

Browse all 19 alloys grouped by family, or use the quick-access filter below. Each datasheet includes chemical composition, mechanical properties, machinability rating, DZR status, RoHS compliance, and international designation cross-references.

Alloy Selection Guide Standards & Certifications
100%
CW614N machinability reference
13
Certified alloys machined
5
Alloy families covered
RoHS
Status on every grade
⚙️ Leaded Free-Machining Brass — 7 grades

Lead (Pb) additions of 1–3% dramatically improve machinability by creating chip-breaking discontinuities. These grades are the workhorses of CNC screw-machining, achieving 65–100% machinability relative to CW614N. RoHS Exemption 6(c) applies (valid to 30 June 2027).

CW617N
CuZn40Pb2
RoHS Ex 6(c) EN 12164 Hot Forgeable
Free-cutting brass at about 90% of the CW614N benchmark. Zn 38–42%, Pb 1.6–2.5%. Excellent for complex CNC parts, valve components and fittings.
90%
Machinability vs CW614N
CW614N
CuZn39Pb3
RoHS Ex 6(c) EN 12164 High Pb
The 100% free-cutting machinability benchmark — highest Pb (2.5–3.5%) for the best surface finish, preferred where finish is paramount.
100%
Machinability vs CW614N
C36000
CuZn36Pb3 / 360 Brass
RoHS Ex 6(c) ASTM B16 US Benchmark
The North American free-cutting standard — Cu 60–63%, Pb 2.5–3.7%. Defines the 100% machinability rating. EN match: CW603N; commercial cross-reference: CW614N.
100%
Machinability vs CW614N
CW625N
CuZn38Pb2
RoHS Ex 6(c) EN 12164
Mid-zinc grade (37–39% Zn) with 1.5–2.5% Pb. Better cold-working than CW617N, good machinability, used for plumbing fittings and pneumatics.
72%
Machinability vs CW614N
CW612N
CuZn38Pb1.5
RoHS Ex 6(c) EN 12164 Low Pb
Reduced Pb (1–2%) for moderate machinability improvement over lead-free grades, with better cold-work ductility. Used in automotive and HVAC.
65%
Machinability vs CW614N
C37700
CuZn39Pb2 / Forging Brass
RoHS Ex 6(c) ASTM B283 Forging 100
The US standard for hot-pressed die forgings — forgeability rated 100, with Pb 1.5–2.5% for clean finish machining (~80%). EN twin: CW612N (CZ122).
80%
Machinability vs CW614N
CW607N
CuZn36Pb2
RoHS Ex 6(c) EN 12164 Low Zinc
Lower zinc (35–37%) gives better dezincification resistance than CW617N — without arsenic. Used where mild corrosion resistance matters alongside decent machinability.
65%
Machinability vs CW614N
💧 DZR & Potable Water Brass — 5 grades

Dezincification-Resistant grades for drinking water systems, gas, HVAC, and marine environments. Qualification per ISO 6509-1. CW602N and C35330 use arsenic inhibition; CW724R, C69300 and C6802 achieve DZR intrinsically via silicon kappa-phase.

CW602N
CuZn36Pb2As
DZR Certified RoHS Ex 6(c) EN 12164
Arsenic-inhibited DZR brass. Max Pb 2.0%, As 0.02–0.15%. ISO 6509-1 qualified. Standard grade used in UK/EU potable-water fittings and valve components; WRAS/regulatory approval is held by the product maker, not Brassland.
62%
Machinability vs CW614N
C35330
CuZn36Pb2As-type (ASTM B453)
DZR Certified RoHS Ex 6(c) ASTM B453
UNS twin of CW602N (CZ132) — arsenic-inhibited DZR with Pb 1.5–3.5% for machinability. ISO 6509-1 qualified; the US/Asia designation for DZR water-fitting components.
62%
Machinability vs CW614N
CW724R
CuZn21Si3P
DZR — Lead-Free RoHS Free EN 12164
Silicon brass — intrinsic DZR via kappa-phase. Pb ≤ 0.10%, fully RoHS compliant with no exemption. Preferred for REACH/RoHS projects and low-lead markets.
80%
Machinability vs CW614N
C69300
CuZn21Si3P (ASTM)
DZR — Lead-Free NSF/ANSI 372 ASTM B371
UNS twin of CW724R — silicon kappa-phase DZR, Pb ≤0.09%, the strongest grade in the library. The US designation for low-lead potable-water components.
80%
Machinability vs CW614N
C6802
CuZn17Si4 (ASTM)
DZR — Lead-Free RoHS Free ASTM B371
ASTM silicon brass with kappa-phase DZR. Pb ≤ 0.09%, used widely in North American and Canadian plumbing code-compliant fixtures (NSF 61).
78%
Machinability vs CW614N
🔩 Structural & Marine Brass — 5 grades

No lead additions — excellent cold-working, deep drawing, and forming properties. RoHS compliant without exemption. Machinability is lower (30–55%) but strength and ductility are superior. Used for stampings, marine hardware, tube, sheet, and structural components.

CuZn37
CW508L / 70-30
RoHS Free Deep Draw
Cartridge brass — 63% Cu, 37% Zn. Best cold-working and deep-drawing in the brass family. Superior elongation. Used for automotive stampings, radiator tanks, cartridge cases.
50%
Machinability vs CW614N
CuZn40
CW509L / 60-40
RoHS Free Muntz Metal
Muntz metal — 60% Cu, 40% Zn. Two-phase α+β structure gives excellent hot-working and moderate cold-work. Used for architectural extrusions, condenser tubes, and marine hardware.
52%
Machinability vs CW614N
C46400
CuZn39Sn1 / Naval Brass
Marine Grade ASTM B21 No Pb Addition
Naval brass — 60/40 with ~0.8% Sn for seawater corrosion resistance. Strong, galling-resistant, hot-forgeable (90). EN twin: CW719R. Machinability ~30%.
30%
Machinability vs CW614N
CW510L
CuZn42
RoHS Free EN 12167
High-zinc lead-free brass for hot forging and extrusion. 42% Zn, excellent hot-workability, used in pressings and hot-forged fittings where lead isn't permitted.
48%
Machinability vs CW614N
C27450
CuZn36 (low-Pb)
RoHS Free Low Lead
35–37% Zn, Pb ≤ 0.09%. Good balance of machinability and corrosion resistance. Used for low-lead plumbing fittings and gas components where RoHS compliance is required.
55%
Machinability vs CW614N
⚡ Copper — 2 grades

Electrolytic-tough-pitch copper for maximum conductivity, plus free-machining tellurium copper at 85% machinability and 93% IACS. C11000 for busbars and transformers; C14500 for machined connectors, terminals, and electrode parts.

C11000
Cu-ETP / CW004A
RoHS Free 99.9% Cu High Conductivity
Electrolytic tough-pitch copper. Min 99.90% Cu. Electrical conductivity ≥100% IACS. Machinability ≈20% — work-hardens rapidly. Used for busbars, terminals, motor windings, and heat exchangers.
20%
Machinability vs CW614N
C14500
CuTeP / Tellurium Copper
RoHS Free 93% IACS ASTM B301
Free-machining copper — 0.4–0.7% Te lifts machinability to 85% while keeping 93% IACS conductivity. The grade for machined electrical connectors and electrode parts. EN twin: CW118C.
85%
Machinability vs CW614N
Why one copper grade?

Pure copper serves electrical applications — brasses serve everything else

Copper alloys (brasses) are copper-zinc mixtures optimised for different properties — machinability, corrosion resistance, formability. Pure C11000 is stocked specifically for electrical and thermal applications where conductivity is non-negotiable. For structural copper alloys (bronze, beryllium copper), contact us for special-order supply.

View Alloy Selection Guide
At a glance

All 19 Alloys — Property Comparison

Alloy Family Machinability Hot Work Cold Work DZR RoHS Datasheet
CW617N CuZn40Pb2 Leaded
90%
No Ex 6(c) View ›
CW614N CuZn39Pb3 Leaded
100%
No Ex 6(c) View ›
C36000 CuZn36Pb3 Leaded
100%
No Ex 6(c) View ›
CW625N CuZn38Pb2 Leaded
72%
No Ex 6(c) View ›
CW612N CuZn38Pb1.5 Leaded
65%
No Ex 6(c) View ›
C37700 CuZn39Pb2 Leaded
80%
No Ex 6(c) View ›
CW607N CuZn36Pb2 Leaded
65%
No Ex 6(c) View ›
CW602N CuZn36Pb2As DZR
62%
✓ As Ex 6(c) View ›
C35330 CuZn36Pb2As DZR
62%
✓ As Ex 6(c) View ›
CW724R CuZn21Si3P DZR
80%
✓ Si ✓ Free View ›
C69300 CuZn21Si3P DZR
80%
✓ Si ✓ Free View ›
C6802 CuZn17Si4 DZR
78%
✓ Si ✓ Free View ›
CuZn37 CW508L Structural
50%
No ✓ Free View ›
CuZn40 CW509L Structural
52%
No ✓ Free View ›
CW510L CuZn42 Structural
48%
No ✓ Free View ›
C27450 CuZn36 low-Pb Structural
55%
No ✓ Free View ›
C46400 CuZn39Sn1 Structural
30%
Sn Verify View ›
C11000 Cu-ETP Copper
20%
No ✓ Free View ›
C14500 CuTeP Copper
85%
No ✓ Free View ›

Machinability rated relative to CW617N = 100% (free-cutting leaded brass reference). Hot/Cold work rated ●●●●● = excellent. DZR per ISO 6509-1.

RoHS Compliance

Lead exemptions expire June 2027

Leaded grades (CW617N, CW614N, C36000, C37700, CW625N, CW612N, CW607N, CW602N, C35330) use RoHS Annex III Exemption 6(c) — valid to 30 June 2027. Lead-free alternatives: CW724R, C69300, C6802, CuZn37, CuZn40, CW510L, C27450, C11000, C14500 are RoHS compliant without exemption. C46400 naval brass has no lead addition (Pb ≤0.20% max) — confirm the mill certificate for RoHS-critical orders.

Standards & RoHS Guide
DZR Selection

Three routes to dezincification resistance

Arsenic inhibition (CW602N): adds 0.02–0.15% As to suppress DZ. Silicon kappa-phase (CW724R, C6802): intrinsic resistance, no inhibitor. Lower zinc (<15% Zn): no DZR needed — relevant for some alloys. All DZR grades are qualified per ISO 6509-1.

Alloy Selection Guide
International Equivalents

EN, ASTM, JIS, and BS cross-references

Each datasheet includes full cross-reference tables: EN 12164/12165/12167 (Europe), ASTM B16/B124/B371 (USA), JIS H3250 (Japan), BS 2874 (UK legacy), and DIN designations. Use the datasheet filter below to find your designation.

Browse all datasheets
Need a specific grade?

We machine and forge all 19 alloys in Jamnagar

Send your drawing or specification. Our engineering team will confirm the best alloy for your application, tolerances, and compliance requirements — typically within 24 hours.

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