Mining high-tensile round link chains
Mining high-tensile round link chains
Mining Round Link Chain
The mining round link chains produced by Gelin can meet the dimension and all the mechanical performance requirements of GB/T 12718; DIN 22252 and other standards
Scope of application
The mining high-strength circular-ring chains produced by Gelin are mainly applied to coal mine scraper conveyors, loaders and coal plough
Users should choose the suitable coating and corrosion prevention methods according to the working condition and storage conditions of individual mines;
Any kind of anti-corrosion coating method may reduce the performance of chains;
Inner width b1
Outer width b2
Note: The surface delivery state of Green products is natural black anti-rust treatment, other requirements from customers need to be negotiated separately;
*Circular chain used in reloader, scraper conveyor, coal plow
Mining Ring Chain
Circular-ring chain with optimized strength
Grade B, C, C+, D
Based on relevant circular-ring chain manufacture standards like GB, DIN and PN, to better serve customers and meet the increasingly complex working conditions in the coal exploration wells, engineering technicians of Gelin have developed grade C+ (>900MPA) and grade D (>1050MPA) circular-ring chains. After reinforcement design, chains have higher strength and wear-resistance performance. Such high-strength chains are made of alloy materials with non-traditional manufacture process. The impact toughness will not be reduced, while achieving higher strength. Different grades of circular-ring chains are applicable to different working conditions. Especially the grade D chains have high hardness and higher tensile strength. Since the hardness is improved, chains are more sensitive to stress corrosion. They are likely to be affected by stress corrosion pits and other environments during service, so it is not suggested that they are applied in strongly corrosive environments.
Table of Strength Characteristics of Each Grade of Chain
Depending on the mine environment and storage conditions, we offer a variety of surface treatments:
- Mechanical stress relief enhanced protection
- Rust-resistant protection
- Hot dip galvanized protection
- Anti-rust and anti-corrosion protection by surface oxidation
Note: The surface delivery status of Green products is: surface oxidation and rust prevention, corrosion resistance protection---it is a natural black rust prevention treatment method.
Under test force
Under breaking force
|Minimum bending deflection f||Minimum fatigue strength|
|Test force||Minimum breaking force|
|38X137||D||1810||2 270||1.9||16||38||90 000|
|42X137||C||1770||2 220||1.6||12||42||70 000|
|42X146||D||2 220||2 770||1.9||16||42||90 000|
*Draft chains for scraper conveyors, transfer machines, and coal plows
The fatigue resistance T (number of cycles) and impact test KV[J] can meet the GB/T12718, DIN22252 and PN-G-46701 standards as well as technical conditions of Gelin.
To achieve good performance of chains in practical work, the hardness distribution at each part of chains is different.
The hardness of the arc part for both the circular-ring chain or compact chain where it meshes with the chain wheel and chain rings connect should be high enough to resist wear, and the toughness of the straight side of chain rings should be improved, so the hardness of the straight side should be a little lower than that of the arc part.
Sincerely look forward to working with you!
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