bedra66800

Manganese Brass

Characteristics:

The alloy is a Cu-Zn-Mn series copper-based multi-element (a + B) two-phase alloy. The addition of Siand Mn improves the strength and wear resistance ofthe alloy, and the addition of Pb enhances its wear resistance and machinability. This alloy combines high strength with high wear resistance.

Typical applications:

It is applied for hydraulic components such as sliding shoes, sliding blocks, return disc stops and regulating valves seat.

Standardization and composition

UNS	C66800
EN	/
JIS	/
GB	T67212 (HMn61-3-1)
Cu	60-63%
Mn	2.0-3.5%
Si	0.5-1.5%
Pb	≤0.5%
Zn	Balance%

Physical properties①

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

Density(g/cm³)	8.3
Melting temperature(℃)	874
Electrical conductivity(%IACS)	22
Thermal conductivity(W/(m·K))	95
Coefficient of thermal expansion②(10⁻⁶/K)	19.1
Modulus of elasticity(GPa)	117

Fabrication Properties

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

Cold workability	Poor
Hot workability	Excellent
Brazing	Good
Resistance welding	Not Recommended
Machinability③	30%
Forgeability④	100%

Mechanical Properties⑤

Note⑤：bedra technical Standard

Temper	Diameter(mm)	Tensile Strength(MPa min.)	Yield Strength(MPa min.)	Elongation(A% min.)	Hardness(HB min.)
HR02	6.0 ≤ Φ ＜ 15	485	345	15	120
HR02	15 ≤ Φ ＜ 50	440	320	15	110
M30	50 ≤ Φ ＜ 120	380	172	20	95

Dimension Tolerance and Delivery Forms

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

			Straight bar
Diameter (mm)	Tolerance⑥(mm)	Ovality (mm max.)	Length (mm max.)	Straightness (mm/m max.)
6.0 ≤ 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