Does the door and window hardware accessories have a shelf life of three years, five years, or ten years?

One of the most frequently asked questions in our daily shopping is how long is the warranty?

Over time, consumers and businesses are used to measuring the quality of a product with a shelf life. And consumers are misguided, businesses are often misleading, how to say?

Take the door and window hardware accessories. For the door and window hardware products, the national quality inspection department has never defined or required the warranty period. That is to say, all products of door and window hardware have no warranty period from the officially recognized level. Many merchants have advertised their product warranty period for several years. These are basically fabricated by the merchants. In fact, they themselves are not sure how long their products can last. This has the possibility of malicious promises and false propaganda.

Some people will ask, there is no warranty period for the door and window hardware, what is the quality inspection standard?

Door and window hardware products are physical structure products, and there will be physical loss during use. So almost all products are used after many times, the product can run normally, and there will be no obvious damage. For example: floor spring: After running 400,000 times, the product can run normally and it is a national qualified quality inspection product. Therefore, under normal use conditions, such products may not cause problems after several years or even ten years.

What if there is no warranty period? Isn't it a hammer sale?

In fact, it does not, although there is no warranty, but many brands will provide warranty service after the sale. Technical home repairs or replacements are provided when there are non-human quality problems with the product. Therefore, when we purchase products, we must understand the word-of-mouth of the products and the after-sales of the brand, so that we can achieve peace of mind.

Therefore, the warranty period is not omnipotent and cannot be applied to the door and window hardware. There are also many other types of products that have this problem, which requires us to understand and learn in our daily lives.

Editor in charge: Wang Zhen

Duplex Stainless Steel Welded Pipe

DUPLEX STAINLESS STEEL

Duplex Stainless Steels Available

Yuhong Group supplies LDX2101, 2205, Ferralium 255, Zeron 100 and LDX2507 in the form of plate, sheet, strip, bar, pipe, tubing, pipe fittings, flanges and weld wire.


Duplex Stainless Steel Overview

Duplex Stainless Steels, also referred to as austenitic-ferritic stainless steels, are a family of grades with about equal proportions of ferrite and austenite. These steels have a duplex microstructure which contributes to their high strength and high resistance to stress corrosion cracking. Due to their high content of chromium, nitrogen and molybdenum, duplex steels offer good resistance to local and uniform corrosion. Duplex stainless steels have good weldability.


Today, modern duplex stainless steels can be divided into three groups:
Lean Duplex such as LDX2101
Standard Duplex such as 2205, the work-horse grade accounting for more than 80% of duplex usage
Super Duplex such as Ferralium 255 and Zeron 100 and LDX2507

Of the duplex grades, duplex 2205 is the most widely used. However, the super duplex steels like Zeron® 100 and LDX2507 are excellent for servicing severe corrosive environments, such as offshore and marine applications. Lean duplex 2101 is available as an economic alternative to 300 series stainless steels.


What are the Characteristics of Duplex Stainless Steels ?
Very good resistance to uniform corrosion
Very good resistance to pitting and crevice corrosion
High resistance to stress corrosion cracking and corrosion fatigue
High mechanical strength
Good sulfide stress corrosion resistance
Good abrasion and erosion resistance
Good fatigue resistance high energy absorption
Low thermal expansion
Good weldability


In what Applications are Duplex Stainless Steels® used ?
Oil and gas equipment
Offshore technology
Seawater desalination plants
Chemical industry, especially when handling chlorides
Flue-gas cleaning
Desalination plants and seawater systems
Pulp and paper industry
Cargo tanks and pipe systems in chemical tankers
Firewalls and blast walls on offshore platforms
Bridges
Storage tanks
Pressure vessels, reactor tanks, and heat exchangers
Rotors, impellers and shafts

Duplex Stainless Steel Welded Pipe,Duplex Steel Welded Pipe,Duplex Steel Butt Welded Pipe

YUHONG HOLDING GROUP CO.,LIMITED , https://www.alloypipeline.com