Our USA customers ordered 6 x 18mm, 8 x 24mm, 10 x 30mm Grade 80 Hoist chain according to EN818-7 chain specification：
EN818-7 Short Link Chain：
EN818-7 hoist chain is lifting short link chains, which is used for chain hoist, lever hoist and electric chain hoist etc. We use high qualified alloy steel to produce hoist chains (Mn alloy steel), all hoist chains will be approved by 6-meter proof load test, breaking link rate is 1/10000, which exceed industrial level 6/10000.
Chain Material: 20Mn2A, 25MnV, 23MnNiCrMo54 etc
Production standard：BS EN818-7
Chain grade：G80
Safety factor：6 meter breaking load test, 2.5 times proof load test, 4 times safety factor.
Surface treatment: black oixde, electroplate, black painted etc
EN818-7 hoist chain technical parameter:
Nominal size dn | Material diameter tolerance | Pitch | Width
| Gauge length | Weld diameter ds max. | |||||
pn | tolerance | Internal W3 min | External W2 max | 11 x pn | tolerance | |||||
4 | ± 0,2 | 12 | 0,25 | 4,8 | 13,6 | 132 | 0,6 | 4,3 | ||
5 | ± 0,2 | 15 | 0,3 | 6,0 | 17,0 | 165 | 0,8 | 5,4 | ||
6 | ± 0,2 | 18 | 0,35 | 7,2 | 20,4 | 198 | 1,0 | 6,5 | ||
7 | ± 0,3 | 21 | 0,4 | 8,4 | 23,8 | 231 | 1,1 | 7,6 | ||
8 | ± 0,3 | 24 | 0,5 | 9,6 | 27,2 | 264 | 1,3 | 8,6 | ||
9 | ± 0,4 | 27 | 0,5 | 10,8 | 30,6 | 297 | 1,4 | 9,7 | ||
10 | ± 0,4 | 30 | 0,6 | 12,0 | 34,0 | 330 | 1,6 | 10,8 | ||
11 | ± 0,4 | 33 | 0,6 | 13,2 | 37,4 | 363 | 1,7 | 11,9 | ||
12 | ± 0,5 | 36 | 0,7 | 14,4 | 40,8 | 396 | 1,9 | 13,0 | ||
13 | ± 0,5 | 39 | 0,8 | 15,6 | 44,2 | 429 | 2,1 | 14,0 | ||
14 | ± 0,6 | 42 | 0,8 | 16,8 | 47,6 | 462 | 2,2 | 15,1 | ||
16 | ± 0,6 | 48 | 0,9 | 19,2 | 54,4 | 528 | 2,5 | 17,3 | ||
18 | ± 0,9 | 54 | 1,0 | 21,6 | 61,2 | 594 | 2,9 | 19,4 | ||
20 | ± 1,0 | 60 | 1,2 | 24,0 | 68,0 | 660 | 3,2 | 21,6 | ||
22 | ± 1,1 | 66 | 1,3 | 26,4 | 74,8 | 726 | 3,5 | 23,8 | ||
1)These tolerances are usually divided into + 2/3 and –1/3 for both the individual link and the standard gauge length. | ||||||||||
