CC753S Brass Casting – CuZn37Pb0.5 EN 1982

CC753S (EN 1982 / CuZn37Pb0.5) is a semi-lead-free yellow brass casting grade with reduced lead content (max 0.50% Pb), positioned between standard leaded yellow brass (CC750S/CC752S, 1–2.5% Pb) and fully lead-free grades (CC212A silicon brass). CC753S is used where regulatory requirements demand lead reduction but not complete lead elimination, and where the investment in a lead-free alloy such as silicon brass is not yet justified.

Alloy Overview

CC753S retains the Cu-Zn yellow brass composition of CC752S (Cu 57–63%, Zn ~37%) with lead reduced to max 0.50%. This provides some machinability benefit over fully lead-free alloys while delivering substantially lower lead content than standard leaded grades. Suitable for applications where lead limits of 0.25–0.50% are mandated by regional regulations, and where full NSF 61 or AB1953 lead-free compliance is not yet required.

Material Composition

Element	Min %	Max %	Typical %	Role
Copper (Cu)	57.0	63.0	60.0	Primary matrix
Zinc (Zn)	Balance	Balance	~37.5	Strength, castability
Lead (Pb)	–	0.50	0.25	Partial machinability
Tin (Sn)	–	0.50	0.10	Minor
Iron (Fe)	–	0.30	0.05	Impurity
Nickel (Ni)	–	0.50	–	Minor
Aluminium (Al)	–	0.50	–	Minor
Manganese (Mn)	–	0.20	–	Impurity
Antimony (Sb)	–	0.05	–	Dezinc. inhibitor
Silicon (Si)	–	0.05	–	Impurity

Mechanical Properties

Property	Sand Cast	Die Cast	Standard
Tensile Strength (MPa)	260 min	295 min	ASTM B584/EN 1982
Yield Strength (MPa)	90	110	ASTM E8
Elongation (%)	20%	22%	ASTM E8
Hardness (HB)	60–85		ASTM E10
Density (g/cm³)	8.47		–
Electrical Conductivity (%IACS)	24–26		–
Melting Range (°C)	875–935		–
Machinability (%)	55–65		CDA scale

International Equivalent Grades

Standard	Designation	Name
Europe (EN 1982)	CC753S	CuZn37Pb0.5-C (Low-Lead Yellow Brass)
USA (ASTM)	C85400 (reduced Pb)	Low-Lead Yellow Brass
Germany (DIN)	CuZn37Pb0.5-C	Gelbguss bleiarm
UK (BS)	–	Low-Lead Brass Casting
India (IS 318)	LTB3 (reduced Pb)	Yellow Brass Low-Lead
ISO	CuZn37Pb0.5-C	Low-Lead Yellow Brass Casting
China (GB)	–	低铅黄铜铸件 (Low-Lead Brass)

Applications

CC753S is specified for: plumbing hardware in markets with intermediate lead regulations (0.5% limit); valves and fittings for non-potable water service where reduced lead is preferred; general hardware castings in EU markets with lead reduction mandates; and as a transitional alloy for manufacturers moving from full-lead to lead-free production.

Pricing

US$ 11.50 per kilogram (CIF, indicative). MOQ: sample 1 pc; production 50 pcs.

Quality

EN 1982 CC753S; ISO 9001:2015; EN 10204 3.1 MTR. Lead-free certification not applicable (Pb ≤0.50% does not meet NSF 61 or AB1953). ISO 9001:2015. EN 10204 3.1 MTR.