Specifications

1.6mm-22mm short link chains
2.Material:20Mn2 or 25Mnv
3.Automatic bending & welding machine

Grade 80 welded link chain for lifting purpose:

We are an experienced factory to manufacture G80 welded link chains for lifting purpose, such as for chain hoist, lever hoist, electric chain hoist, chain sling etc,  also to make load chains, ordinary steel link chains, G70 transport chains, Grade"C" mining chains, short or long link chain, G30 proof link coil chain, straight link coil chains, snow chains, chain block, lever block and electric hoist for more than 20 years; we produce grade 80 welded link chains by automatic bending, trimming and welding machines, and automatic test machine, and the quality is strict controled by our engineers and each lot link chains will be issued mill test report.  Our link chains have been exported to russia,Korea, Canada, Colombia, Italy, South Africa, United State etc. 

1)        Surface treatment: Self color, black oxide, electro galvanized, hot dip galvanized, black painted etc.

2)        Material: 20Mn2, 25Mnv, 23MnNiMoCr54, Q235

3)        Standard: National Standard (GB/T20947-2007), International Standard (ISO3077-2001), American Standard (NACM, ASTM), European Standard (EN818), AS/NZS Standard

Working process of grade 80 link chains for lifting purpose:

1. Receive the purchase order  2. Product requirement  3.Buy raw material  4. Inspect raw material  5. Store raw material 6. Wire rod drawing  7. Bending  8. Trimming and welding  9.Check surface  10. Sampling and breaking test  11.Calibration  12. Heat treatment 13. Proof load test  14. Black oxide, zinc plated and hot dip galvanized  15. Sampling and breaking test  16. Cutting  17. Final inspection  18. Packing  19. After-sale service

Technical parameter of G80 welded link chains (GB/T20947-2007 Standard or EN818-2 Standard):

Size d x p mm	Width		Approx Weight Kg/m	Working Load Limit t	Test Load KN	Breaking Load min. KN
	Inside min. a	Outside max. b
6X8	7.5	21	0.79	1.1	27	45.2
7x21	9	24.5	1.07	1.5	37	61.6
8x24	10	28	1.38	2	48	80.4
10x30	12.5	35	2.2	3.2	76	125
11x43	12.6	36.5	2.33	3.8	92	154
12x36	15	42	3.1	4.6	109	181
12.5x38	15.5	42.2	3.3	4.9	117	196
13x39	16.3	46	3.8	5	128	214
14x42	18	49	4.13	6.3	150	250
14x50	17	48	4	6.3	150	250
15x46	20	52	5.17	7	168	280
16x48	20	56	5.63	8	192	320
16x49	24.5	59.5	5.71	8	192	320
16x64	23.9	58.9	5.11	8	192	320
18x54	23	63	6.85	10	246	410
18x64	21	60	6.6	10	246	410
19x57	23.7	63.2	7.7	11.3	270	450
20x60	25	70	8.6	12.5	300	500
22x65	28	74.2	10.7	15.3	366	610
22x66	28	77	10.2	15.3	366	610
22x86	26	74	9.5	15.3	366	610