bedra67300

Manganese Brass

Characteristics:

This alloy is a high strength leaded silicon manganese brass with typically good bearing qualities. The addition of Si and Mn improves the strength and wear resistance of the alloy, and the addition of Pb enhances its wear resistance and machinability. This alloy combines high wear resistance, high bearing strength, high machinability with excellent forgeability.

Typical applications:

It is well suited for valve seats, clutch bearings,shaft bushings, sleeve bearings, thrust bearings.pump parts, drive shafts, bearing pins, wear plates,gears and cams.

Standardization and composition

UNS	C67300
EN	/
JIS	/
GB	C67300 (HMn60-3-1.7-1)
Cu	58.0-63.0%
Mn	2.0-3.5%
Si	0.5-1.5%
Pb	0.4-3.0%
Zn	Balance%

Physical properties①

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

Density (g/cm³)	8.3
Metling temperature (℃)	874
Electrical conductivity (%IACS)	22
Thermal conductivity (W / m x K)	95
Coefficient of linear mean expansion② (10-6/K)	19.1
Modulus of elasticity (GPa)	117

Fabrication Properties

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

Cold workability	Poor
Hot workability	Excellent
Brazing	Good
Resistance welding	Not Recommended
Machinability ③	50%
Forgeability ④	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 ＜ 50	448	276	18	110
HR04	6.0 ≤ Φ ＜ 50	480	340	15	130
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. When tolerances are specified as plus and minus (±), half the values given.

			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