(2) Multi-stage oils should be selected as much as possible. Multi-stage oils have good protection effects on the engine due to its saving, long life, and high efficiency. Based on the characteristics of multi-grade oils, premature blackening may occur during use, and the oil pressure is smaller than ordinary oil. (3) The quality of some domestically-made brand-name oils is quite good, and the price is lower than that of imported similar products. It can be used with confidence, and there is no need to blindly pursue “dollar oilâ€. (4) If the engine is in good condition and the seasonal temperature is low, the less viscous oil should be used as far as possible so that the oil path can be opened. For example, in high temperature seasons or severe engine wear conditions, the use of high-viscosity motor oil is beneficial to oil film formation and engine wear.
BRIGHT STEEL BAR
Bright steel bar is carbon or alloy steel bar with shining bright surface which is improved by cold drawing, peeling, turning, grinding and polishing over hot rolled black surface bars. By cold drawing, the steel bar yield strength and tensile strength will be improved. By peeling and turning, the surface imperfections will be removed. By grinding, the diameter tolerance will be more precision. By polishing, the surface will be much more shining.
Except the shining bright surface, comparing with the hot rolled black surface bars, the bright steel bars has better surface roughness, better roundness, straightness, more precision size tolerance etc.
Heat treatment such as annealing, normalizing, quenching and tempering will be done before do cold finishing on the hot rolled bar to get bright steel bar, in such condition, the steel bright bar will get most suitable mechanical properties to meet different application requirement.
The advantages of steel bright bars we supply:
1) Big stocks of hot rolled round bars or wire rods as raw materials
2) Heat treating furnaces to adjust the mechanical properties
3) Full sets of testing equipment to test the sizes, mechanical properties and microstructure.
4) Multiple packages to avoid broken packages and anti-rusty
Diameter tolerance
+0/-0.02mm
Straightness
0.5mm/m
Surface roughness
0.4um
Roundness
80% of diameter tolerance
Diameter range
14mm to 100mm
Steel grade
Kinds of carbon steel and alloy steel
Length
Any length can be cut with precision tolerance
Bright Steel Bar,Bright Steel Round Bar,Steel Bright Bar,Bright Polished Steel Bar,Alloy Steel Bright Bar Manufacturer SHANDONG LE REN SPECIAL STEEL CO., LTD. , https://www.sdcolddrawnsteelbar.com
(1) The choice of engine oil should be based on the requirements of the engine. It is not necessary to use too high-grade engine oil on lower-demand engines, or to use lower-grade engine oil on more demanding engines.
Optional oil note four elements
The maintenance experts of the automobile industry believe that under normal circumstances, the following four elements should be taken into consideration when selecting motor oil: