• Product Name
  • Product Keyword
  • Product Model
  • Product Summary
  • Product Description
  • Multi Field Search

Products Category

Products


 : +86-750-3652251 / 3856396

: +86-750-3856395 / 3856397

www.dndhardware.com

: sales@dndhardware.com

 

Product Information

  • How to identify Stainless Steel 304 Grade or 316 Grade?

    When selecting stainless steel hardware, it is important to understand the differences between the variety of grades and finishes available so you can choose the products that will work most safely and effectively for your purposes. It’s difficult to distinguish between these two types of steel visually, but significant differences between the two steel types do exist and are important to understand.Below is a basic guide to the similarities and differences of 304 grade and 316 grade stainless steel.1. CompositionThe first key difference between 304 grade stainless steel and 316 grade stainless steel relates to composition. Steels are classified in part based on chromium and alloy content and crystalline structure. Austenitic steel – also known as 300 series steel – contains 18% chromium and 8% nickel. This type of steel is incredibly common; about 70% of stainless steel products are composed of austenitic steel. 304 grade stainless steel is considered to be austenitic, while 316 grade

    2016-08-13
  • How to Clean Brass Hinges

    Keeping brass hinges shiny and clean is very important. But over time, they might acquire a bit of grime or tarnish. Do you want to clean brass hinges by yourself? Now there are six ways which can help you clean them. 1. Wipe the brass hinge with soapy water.Mix hot water with a few drops of liquid

    2017-11-09
  • Composition Effects on The Magnetic Permeability of Austenitic Stainless Steels

    IntroductionAustenitic stainless steels are generally non-magnetic with magnetic permeabilities of around 1.0. Permeabilities above 1.0 are associated with the amount of either ferrite or martensite phases present in the 'austenitic' steel and so depend on:chemical composition· cold work

    2017-08-22
  • Is stainless steel 304 non-magnetic?

    It is commonly stated that “stainless steel is non-magnetic”. This is not strictly true and the real situation is rather more complicated. The degree of magnetic response or magnetic permeability is derived from the microstructure of the steel. A totally non-magnetic material has a relative magnetic

    2017-08-22
  • CODE LIST SURFACE TREATMENT / FINISHES

    CODE LIST FOR SURFACE

    2017-12-15
  • Acceptable Quality Limit(AQL) Standard

    Quality StandardsWe use the internationally recognized Acceptable Quality Limit (AQL) standard for all product inspections. For each inspection, this allows the client to set their acceptable quality tolerance levels.Acceptable Quality Limit (AQL)D&D Inspectors exclusively use ISO 2859 tables to mea

    2017-12-20
  • Stainless Steel Materials

    The principle material used in D&D Hardware products is Stainless Steel. Other material such as brass, zinc alloy or other material are also used for specific site requirements or aesthetic reasons.D&D products are manufactured from a high corrosion resistant Chrome-Nickel Stainless Steel combinatio

    2017-12-15
  • ACCESS CONTROL SYSTEMS

    ACCESS CONTROL SYSTEMS Are classified under the same classifications as the doorhardware in/on which they are integrated .This means thatthe access control systems supplied by GBM Solutions isclassified according to EN1303 –cylinder for locks ,DINEN 18252 –locking cylinder for door locks

    2015-12-09
  • What Is a Flag Hinge?

    A flag hinge is a piece of hardware used to allow movement of two pieces of material. They are commonly used on various types of doors to facilitate directional movement; the flag hinge itself is usually mounted on a vertical plane, thereby allowing horizontal movement of a door or other piece of ma

    2017-12-15
  • Different Product Rang of the Pinning Center

    The D&D pinning Center is staffed by factory trained technicians and isequipped with the latest computerized software and key cutting machinery FeaturesBS EN 1303-2005 performance testedQuality solid brass body and plug30 degree offset cam inhibits knock throughAnti pick key profile Large rang of k

    2015-12-04
  • Introduction Grade 3 Lever Handle

    Introduction Grade 3 Lever HandleD&D grade 3 level handle are suitable for high frequency of use by public or others with little incentive to exercise care and with a high chance of misuse , e.g.public office doors ,common area doors etc. FeaturesGrade 304 stainless Steel .Distinctive “Snap

    2015-12-04
  • Frequency of Door Usage and Standard for Lock

    Guidelines for frequency of door usage and standard for lock Build type Daily usage Yearly usageStandard for lock High frequency & Heavy weight door Large department store entrance 5,000 1,825,000 ANSI standard Lock Hospital corridor and surgical

    2015-09-04
  • Door Locks Standard

    Door Locks Standard ·American National Standard Institute(ANSI)·European(EN)·Australian Standard(AS)·CNACL China Local Fire Test Beauer Certificate CANCL to be satisfiedHardware-Cycle Test Product EN ANSILockset

    2015-09-03
  • Mortise Lock Components

    D&D Hardware Mortise Locks are meet EN12209,according to DIN 18250, 18251, suitable for commercial, industrial and prestigious residential projects and provide different functions to meet various applications.

    2015-07-20
  • How to fix blocked door locks?

    In general, as long as there are doors, locks are needed, and locks are an integral part of any place. A door lock can protect the personal belongings are not violated, so to ensure the integrity of the lock is important.

    2017-08-28

Contact Info

:+86-139 2903 7292   David Jian

: +86-750- 3856396

 : sales@dndhardware.com 

:  No.4 Bldg, Street 33, West Gaoxin Rd, High-tech Zone, Jianghai Dist. Jiangmen City, Guangdong, China 

©Copyright D&D HARDWARE INDUSTRIAL Co., Ltd. All Rights Reserved.