MEI 62

Overview

MEI-62 (Naval Brass Grade 1, CuZn36Sn1) has higher copper and tin content than Grade 2, providing superior corrosion resistance and improved ductility.
Highly resistant to dezincification and seawater corrosion at elevated temperatures. Forgeability rating 90%.

CHEMICAL COMPOSITION (wt. %)		ALLOY DESIGNATIONS		COIL / SHEET SPECIFICATIONS
Element	Composition (%)	Standard	Designation	Specification	Range
Cu	61.00 – 63.50	IS	IS 291	Thickness (mm)	0.3 – 25.0
Sn	1.00 – 1.50	JIS	—	Width (mm)	≤1250
Pb	≤0.20	ISO	CuZn36Sn1	Length (mm)	≤2500
Fe	≤0.10	ASTM	—	Form	Sheet / Plate
Zn	Rem.	BS	CZ112

MECHANICAL PROPERTIES — typical values at 20°C
Temper	Condition	Tensile MPa (min)	Yield MPa (min)	Elong. % (min)
Hot Rolled & Annealed	O	340 / 50	140 / 20	25
As Hot Rolled	M	340 / 50	140 / 20	25

PHYSICAL PROPERTIES — annealed temper at 20°C
Density (g/cm³)	Elec. Conductivity (% IACS)	Thermal Conductivity (W/m·K)	Modulus of Elasticity (GPa)	Specific Heat (J/kg·K)
8.41	26	116	103	375

FABRICATION PROPERTIES
Fabrication Property	Rating	Fabrication Property	Rating
Soldering	Excellent	Seam Weld	Fair
Brazing	Excellent	Butt Weld	Good
Oxyacetylene Welding	Good	Cold Working Capacity	Fair
Gas Shielded Arc Welding	Fair	Hot Forming Capacity	Excellent
Coated Metal Arc Welding	Not recommended	Forgeability Rating	90%
Spot Weld	Good	Machinability Rating	30%

CORROSION RESISTANCE
MEI-62 Naval Brass is highly resistant to dezincification, greatly inhibiting seawater corrosion at higher-than-normal temperatures. Resistant to wear, fatigue, galling and stress corrosion cracking. The higher copper content relative to Grade 2 provides enhanced corrosion resistance and ductility in marine environments.

TYPICAL APPLICATIONS
• Precision shipboard equipment	• Pressure vessels, condenser plates and heat exchanger plates
• Valve guides, valve stems and marine hardware	• Decorative fittings, turnbuckles and missile components