bedra67405

Manganese Brass (lead-free)

Characteristics:

It is a Cu–Zn–Mn–Al–Si series copper-based multi-element alloy. The addition of Si and Mn improves the strength and wear resistance of the alloy, and the addition of Al increases the yield strength of the alloy. The product is a high-strength wear-resistant copper alloy with β phase as the matrix and Mn–Si compound as the wear-resistant phase. The alloy is an environmentally friendly and wear-resistant copper alloy that meets the EU RoHS directive.

Typical applications:

It is widely used in valve guides, floating and thrust bearings in the automotive industry, as well as oil distributors and bushings in the hydraulic industry.

Standardization and composition

UNS	C67400
EN	CW713R
JIS	/
GB	T67402
Cu	57.0-59.0%
Mn	1.5-3.0%
Si	0.3-1.3%
Al	1.3-2.3%
Pb	≤0.1%
Fe	≤1.0%
Sn	≤0.4%
Zn	Balance%

Physical properties①

Note①：The testing temperature is 20℃. Note②：The testing temperature range is 20℃ to 300℃.

Density(g/cm³)	8.08
Melting temperature(℃)	885
Electrical conductivity(%IACS)	23
Thermal conductivity(W/(m·K))	100
Coefficient of thermal expansion(10⁻⁶/K)	19.1
Modulus of elasticity(GPa)	110

Fabrication Properties

Note③：C36000 = 100% Note④：C37700 = 100%

Cold workability	Poor
Hot workability	Excellent
Brazing	Good
Resistance welding	Good
Machinability③	30%
Forgeability ④	100%

Mechanical Properties⑤

Note⑤：bedra technical standards

Temper	Diameter(mm)	Tensile Strength(min.MPa)	Yield Strength(min.MPa)	Elongation(min.A%)	Hardness(min.HB)
R540	5.0 ≤ Φ ≤ 80	540	280	15	145
R590	5.0 ≤ Φ ≤ 120	590	370	10	160

Dimension Tolerance and Delivery Form

Note⑥：The tolerances listed in the table are specified as all plus or all minus. When tolerances are specified as plus and minus (±), half the values given.

			Straight bar
Diameter(mm)	Tolerance(mm)	Ovality(max.mm)	Length(max.mm)	Straightness(max.mm/m)
5.0 ≤ Φ 10	0.06	0.03	3600	0.3
10 ≤ Φ 18	0.07	0.03	3600	0.3
18 ≤ Φ 30	0.08	0.04	4000	0.5
30 ≤ Φ 50	0.16	0.08	4000	0.5
50 ≤ Φ 60	0.80	0.40	4000	1.0
60 ≤ Φ 80	1.6	0.80	3000	1.0
80 ≤ Φ 120	2.0	1.0	2500	5.0