NTB-50 Solid-lubricant-Embedded

Product series: NTB-50 Series

Product Details:

Substrate characteristics

NTB-50 with a high strength copper alloy as a base material, according to the use condition in which a certain percentage of the cavities machined working surface and a solid lubricant filled, high-strength copper alloy provides a high load carrying capacity of the solid lubricant is can form a low friction. Under dry friction conditions we have designed one pre-lubricated bearing surface film can ensure the shortest possible time will be transferred to the solid lubricant and even pieces of an effective solid lubricant film.

Technical Parameters

Material characteristics:

· Long-term use without maintenance;

· Designed for high static load and dynamic bearer;

* Has a very low coefficient of friction and smooth, no "sticking" phenomenon;

· Dust resistant, corrosion resistance, impact resistance and edge load capacity;

· Metal substrate with good shock absorption capacity;

· Can be used within a wide temperature range;

· Suitable for reciprocating, rotary and oscillating and other start-frequent and difficult to form a film of the occasion;

* Has a very low wear rate and long service life.

Material composition and performance table
Material Grade	650	650S1	650S2	650S3	650S5	650HP
Chemical Composition	CuZn25Al5Mn4Fe3	CuSn5Pb5Zn5	CuAl10Ni5Fe5	CuSn12	CuZn25Al5Mn4Fe3	CuZn32Al5Ni3
Density	8	8.9	7.8	8.9	8	8
Hardness HB	>210	>70	>150	>95	>250	>280
Tensile strength N/mm2	>750	>200	>600	>260	>800	>540
Yield Strength N/mm2	>450	>90	>260	>150	>450	>450
Elongation%	>12	>15	>10	>8	>8	>0.3
Linear expansion coefficient	1.9x10-5/℃	1.8x10-5/℃	1.6x10-5/℃	1.8x10-5/℃	1.9x10-5/℃	1.8x10-5/℃
Temperature ℃	-40~+300	-40~+400	-40~+400	-40~+400	-40~+150	-40~+150
Maximum dynamic bearing N/mm2	100	60	50	70	120	150
The maximum line speed m/min	15	10	20	10	15	15
The maximum PV value (lubrication) N/mm2*m/min	200	60	60	80	200	200
Permanent compression deformation 300N/mm2	<0.01mm	<0.05mm	<0.04mm	<0.05mm	<0.005mm	<0.005mm

Solid Lubrication economy
Solid lubricant	Property	Typical use
High purity graphite + additives	Good wear resistance and chemical stability, temperature <400 ℃	For general machinery, used in the atmosphere.
PTFE+Additive	Low friction coefficient and good moist nature, <300 ℃	For water, seawater lubricated, such as ships, hydraulic radial gate, turbine, Pharmaceutical and beverage machinery.

Chemical properties
Chemicals	Concentration ％	Temperature℃	650#	650S1	650S2	650S3
Strong acid	5	20	×	×	×	×
Hydrochloric acid	5	20	×	△	△	△
Hydrofluoric acid	5	20	×	×	×	×
Nitrate	5	20	×	△	○	○
Sulfuric acid	5	20	×	△	○	○
Phosphate
Weak acid	5	20	×	×	○	○
Acetic acid	5	20	×	×	○	○
Formic acid	5	20	×	×	○	○
Boric acid	5	20	×	×	○	○
Citric acid
Alkali	10	20	×	×	×	×
Ammonia	5	20	△	△	○	○
Sodium hydroxide	5	20	△	△	○	○
Potassium hydroxide		20	△	△	○	○
Solvent
Acetone		20	△	△	○	○
Carbon tetrachloride		20	△	△	○	○
Ethanol		20	△	△	○	○
Ethyl acetate		20	△	△	○	○
Ethyl chloride		20	△	△	○	○
Glycerin
Salt			×	×	×	×
Ammonium nitrate			○	○	○	○
Calcium chloride			○	○	○	○
Magnesium chloride			○	○	○	○
Magnesium			○	○	○	○
Sodium chloride			○	○	○	○
Sodium nitrate			×	×	○	○
Zinc chloride			○	△	○	○
Zinc sulfate
Gas			×	△	△	△
Ammonia			△	○	×	×
Chlorine			×	×	○	○
Carbon dioxide			×	△	×	×
Flue gas			△	△	○	○
Sulfur dioxide			×	△	△	△
Hydrogen sulfide			×	△	○	○
Nitrogen			○	○	○	○
Hydrogen			○	○	○	○
Lubricants and fuel			○	○	○	○
Paraffin			○	○	○	○
Gasoline			○	○	○	○
Kerosene			○	○	○	○
Diesel fuel			○	○	○	○
Mineral oil			○	○	○	○
Other
Water			△	○	○	○
Seawater			×	△	○	○
Resin			△	○	○	○
Hydrocarbons			△	○	○	○