Market classification of metal lock material complicated, diverse processing technology, and specifications vary, then how to pick the door hardware locks, small series finishing a number of hardware manual, which is how to choose a hardware lock for a detailed description. A look lock material Lock material on the market basically divided into stainless steel, copper, zinc alloy. High strength stainless steel, corrosion resistance, no discoloration, is the best lock material; copper is more general, superior mechanical properties, higher prices; lock high quality zinc alloy strong wear resistance, corrosion resistance and easy molding, Used for mid-range lock. Second look lock surface treatment Surface treatment is roughly divided into three kinds of electroplating, spraying and coloring, the lock through the surface treatment to form a dense protective film on the surface of the product, play a role in preservative and rust-proof, so lock more beautiful and durable. Thick protective film is also a measure of the quality of locks, good quality locks, and more use of electroplating treatment, fine smooth coating, uniform moderate, bright color, no bubbles, rust and oxidation signs. Three to see the implementation of locks standards Foreign hardware locks have very strict standards, so the quality of imported products is relatively higher. We can feel the lock is good or bad. In general, the feeling of heavy locks, relatively high quality; lock body can not be exposed, the tip is easy to hurt, in particular, should pay attention to lock the end of the lock handle, bolt and lock body three corners; lock a good lock Open flexible, high sensitivity, long service life. Locks also exist a variety of styles, we must pay attention and the style of the interior door consistent.
Normalized steel bar is produced by normalizing which is one kind of heat treatment to get even microstructure and better mechanical properties and hardness. Our advantages and more services of normalized steel bar includes:
1) Wide range of diameters from 10mm to 100mm
2) Customized Length from 100mm to 12000mm
3) Good surface roughness: 0.4um to 1.5um
4) Good straightness: 0.5mm/m to 2mm/m
5) Good roundness: 80% of diameter tolerance
6) Diameter tolerance: -0.02mm to -0.06mm/h9, h10, h11
7) Matched further processing: Grinding, polishing, straightening
8) Anti-rusty package
9) Full sets of testing equipment: Surface, Dimenstion. Mechanical properties testing
10) Fast delivery time
Round Bar,4140 Round Bar,S355J2 Round Bar,1045 Normalized Steel Properties SHANDONG LE REN SPECIAL STEEL CO., LTD. , https://www.sdbrightsteelbar.com