1) Price
Because the price of stainless steel handle is directly related to the price of stainless steel, but generally the price of aluminum alloy doors and windows is relatively stable in a certain period of time. In general, the price of high-quality aluminum alloy is higher than that of inferior aluminum alloy doors and windows. It is 30% higher, and inferior stainless steel handles usually use recycled aluminum extruded aluminum profiles containing a large amount of impurities, and some of the aluminum profiles used have a wall thickness of only 0.6-0.8 mm.
Both the tensile strength and the yield degree are much lower than the relevant national regulations. This kind of stainless steel handle, especially the stainless steel handle, is very unsafe, so the owner must not look down on himself and others when purchasing products. personal safety.
2) Performance
The performance of stainless steel handles is different due to the different scope of use, but usually the following aspects should be considered:
Strength: In the selection of profiles for aluminum alloy doors and windows, can he withstand ultra-high pressure;
Air tightness: in terms of door and window structure, whether the inner fan and outer frame structure of the door and window are tight, and whether the aluminum alloy outdoor window is tight and airtight;
Water tightness: whether there is water accumulation and leakage;
Sound insulation: It depends on the sound insulation effect of insulating glass and other special sound insulation airtight strip structures, as well as the durability of other door and window accessories such as opening and closing force, heat insulation, nylon guide wheel durability, and opening and closing durability.
3) Processing
The technical content of stainless steel handles is not high, and the degree of mechanization is not high at present. Most of them still rely on the manual operation of installation workers, which requires operators to have a good awareness of product quality. It is very important to strengthen the operator's proficiency and product awareness in the production process.
High-quality aluminum alloy doors and windows, fine processing, smooth tangent, consistent angle (the main frame material is usually 45 degrees or 90 degrees), there should be no obvious gaps during the splicing process, the sealing performance is good, and the switch is smooth.
Inferior aluminum alloy doors and windows, especially stainless steel handle products, if the processing is unqualified, there will be problems with sealing properties, not only air leakage and rain, but also under the action of strong wind and large external force, the glass will burst and fall off, which will cause damage to the owner. Losing property or even hurting people.
4) Materials
Stainless steel handle materials generally include three aspects: aluminum profiles, glass, hardware
When purchasing products, owners often pay more attention to the thickness of aluminum profiles and glass, but the requirements for hardware are not very high, which is not comprehensive. In fact, the country has certain standards for aluminum alloy doors and windows. The aluminum profiles used for high-quality stainless steel handles generally meet national standards in terms of thickness, strength and oxide film.
For example, the relevant national regulations require that the wall thickness of the aluminum profile of the stainless steel handle should be no less than 1.2mm.