G80 Lifting Chains
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G80 Alloy Steel Short Link Chains For Lifting-From China Wristrong
Wristrong Industry provides virous types of alloy steel chains. All of our chains are manufactured from hardened and tempered alloy steels and has a high resistance to impact and wear to meet critical requirements of EN818-2,AS2321,DIN5685A/C,NACM,OSHA,ASTM80,NACM84/90, NACM96,DIN764,DIN763,DIN766,ETC.
Wristrong Grade 80 chains are designed and produced for lifting purpose. Our G80 short link chains are manufactured from grade 80(t) alloy steel with safety factor 4:1. All the aspects of our g80 lifting chains are manufactured and tested acc.to European standard EN818-2 or Australian/New Zealand Standard AS2321.Detailed features for our G80 short link alloy stell lifting chains go as follows:
-Manufactured to EN818-2, AS2321
-Manufacturer’s test certificate can be supplied as required.
-Safety Factor: 4:1
-100% 2.5 times of W.L.L proof load tested and 100% calibrated.
-Manufacturer’s ID Number and Grade Number marked each meter if required.
-Made from 100% Grade 80(T) alloy steels.
-Fatigue tested at 1.5 times of W.L.L for 20000 times..
-Elongation less than 20% under load.
-Blacken or painted or galvanized outside treated.
-Free Sample available upon request.
-Traceable tags available on request.
-Standard marks: G80 WC08(CHAIN SIZE) + Grade marks + ID + BATCH No.
Specification On G80 Alloy Steel Short Link Chains For Lifting:
Working Load Limits(W.L.L) & Proof Force Test
Size Bellow in MM
The Production Process of Wristrong Lifting Chains：
1:FORMING: Link shape and V notche check required during the full procedure. Dimensions check required.
2:WELDING: The weld was produced using the resistance butt processes and positioned in the centre of one leg of the link. It was smoothly finished all round. The links and welds shall not show fissures, notches or similar faults that are detrimental to the chain after welded. The diamater of the material at the weld was nowhere exceed the dimenstions requirements and not.less than the diameter of the material of the link.For smooth welded chain, fins caused by welding will be removed and the weld will be smoothly finished all round. The positioning of the weld at the centre of the straight barrel and the tolerances imposed on protrusions at the weld will provide the required clearances.
3:CALIRATING: Dimension check required for each calibration. Proof load on calibration shall be record for each batch.
4:MARKING: Chain Calibration Machine. Tow series available for 5mm to 16mm chain diameter marking/stamping. One key start. Adopt PCC control system with automatic-stop function when encounter fault, Reasonable mould design. Add self-weight function for the machine to increase the operational stability.Pneumatic marking system which can also mark on two links at the same time.
5:HEAT TREATMENT: All the chain has been intermediate-frequency heat treated, it was hardened from a temperature above the AC3 point and tempered before being subjected to the manufacturing proof force. The termpering conditions was at least as effective as a temperature of 400°C maintained for a period of 1 hour. When proposed for verification, sample chains has be tested after they have been reheated to and maintained for 1 hour at 400°C and then cooled to room temperature.( AS 2321:2014 required the chain to be tempered in temperature at least 200°C for V200 and 380°C for V400).
Hardness check required.
Proof load and breaking load tests required.
Elongation measurement required.
Bend test required.