Marine Chains

Products

Items 1-30 of 51

Page
Items
  1. Titan CHAIN ISO G30 HDG
    Starting at $308.00 Special Price $243.95

    Ships: In 1 Business Day

  2. Lewmar Anchor Rode
    Starting at $498.89 Special Price $403.90

    Ships: In 1 Business Day

  3. Ships: In 1 Business Day

  4. Powerwinch Anchor Winch Rodes Marine Chains
    Starting at $229.99 Special Price $186.99

    Ships: In 1 Business Day

  5. Seasense Anchor Chain, Vinyl Coated Marine Chains
    Starting at $14.99 Special Price $11.24

    Ships: In 1 Business Day

  6. Ships: In 1 Business Day

  7. Seachoice Anchor Lead Chain w/ Shackles Marine Chains
    Starting at $9.95 Special Price $9.00

    Ships: In 1 Business Day

  8. Seachoice Proof Coil Galvanized Marine Chains
    Starting at $343.00 Special Price $251.95

    Ships: In 1 Business Day

  9. Seachoice Anchor Lead Chain, White PVC Coated Marine Chains
    Starting at $14.25 Special Price $10.06

    Ships: In 1 Business Day

  10. Lewmar Windlass Series Anchor Rode Marine Chains
    Starting at $215.49 Special Price $175.86

    Ships: In 1 Business Day

  11. Ships: In 1 Business Day

  12. Acco Babcock Chain Hi-Test
    Starting at $14.79 Special Price $8.71

    Ships: In 1 Business Day

  13. Acco Babcock Chain Galv Bbb
    Starting at $10.49 Special Price $6.82

    Ships: In 1 Business Day

  14. Acco Chain Vinyl Chain, White Marine Chains
    Starting at $37.00 Special Price $21.95

    Ships: In 1 Business Day

  15. Seasense Anchor Chain Marine Chains
    Starting at $8.39 Special Price $6.74

    Ships: In 1 Business Day

  16. Trimax 5'super Chain W/U-Lock
    Mfg SKU: THEX5060
    $48.95

    Ships: In 1 Business Day

  17. Seadog Anchor Chain
    Starting at $17.00 Special Price $14.95

    Ships: In 1 Business Day

  18. Other SAFETY CHAIN 1/4"
    Starting at $8.95 Special Price $8.00

    Ships: In 1 Business Day

  19. Greenfield ANCHOR LEAD CHAIN
    Starting at $22.29 Special Price $18.28

    Ships: In 1 Business Day

  20. Dutton-Lainson COUPLER W PIN/CHAIN
    Starting at $38.00 Special Price $26.95

    Ships: In 1 Business Day

  21. CE Smith Safety Chain Set
    Starting at $24.99 Special Price $16.95

    Ships: In 1 Business Day

  22. Acco Babcock Anchor Lead Wh Poly
    Starting at $43.00 Special Price $28.95

    Ships: In 1 Business Day

  23. Ships: In 1 Business Day

  24. Grade 30 Proof Coil Hot Dip Galvanized Chain, Drum
    Starting at $825.99 Special Price $530.99

    Ships: In 1 Business Day

  25. G43 Mooring Chain Long Link
    Starting at $1,751.49 Special Price $1,124.99

    Ships: In 1 Business Day

  26. Seachoice Proof Coil Chain, Galvanized
    Starting at $398.00 Special Price $291.95

    Ships: In 1 Business Day

  27. G43 Long-Link Chain
    Starting at $663.00 Special Price $582.95

    Ships: In 1 Business Day

Items 1-30 of 51

Page
Items

Marine Chains How-Tos

Anchor Chain Test by Yachting Monthly's (Video)

A video presentation by Yachting Monthly on testing the strength of various chains, and what size is safe for your boat.

Video Transcript

Welcome to Atlantic Engineering in beautiful Birkenhead for Yachting Monthly's test of anchor chains. So here is our lab, here are samples of chains and here is our expert Vyv Cox to talk us through it.

We have here 13 samples of chains which have been obtained from North Wales juggleries and from some specialist suppliers. At this end of the table we have grade 30 chains which is the lower strength, is commonly used for anchoring. The four at this end are grade 40 chains which are slightly more expensive but should be rather stronger than the grade 30. The intention is I have already measured in the dimensions of these chains to check that they comply with the specifications and from now we shall be testing them in a tensile test machine which will determine their ultimate tensile strength.

What you have here is at Denison tensile testing machine capable of pulling up to 50 tons. It consists of the upper jaws here and the lower jaws here. We clamp the chain in between these jaws, this table then move down and we can measure the strength at which the chain fails on this panel over here. We can also determine the rate at which the table is moving down again off that panel there and the whole machine is driven hydraulically.

The load is now beginning to come on the chain, the rate is being displayed in the lower screen. it takes just a little bit of adjustment but we are working on 140mm a minute. The load there measured in kilo newtons is now just past 20 which is just over 2 metric tons. This is a grade 30 chain, the specification for that is over 30 kilo newtons. But once it passes 30 we can confidently say that the chain is well within specifications. The rate is still climbing at a good rate which means we are not yet approaching the ultimate tensile strength. Once you reach an area close to the UTS, the rate will decline and eventually stop. The pull on the chain will continue until it eventually fractures. 40 kilo newtons is 4 tons so this is considerably above the specifications for this. The rate is just beginning to decline a little bit now, that seems to be the maximum, the machine is still pulling the chain. Oh it's moved on up again, this would seem to be a particularly strong example of 5th grade 30 chain.

All of these have now been pulled in the tensile tester. We've recorded all the results and we can observe that there are three different fracture types and I'll talk about those now.

This is a very typical tensile failure in a ductile metal. The fracture is known as a cup and cone type, so we have a cone shape there and a cup type there. There is a lot of elongation, the appearance of the fracture is somewhat known as woody and that is a very typical ductile fracture.

This is a fracture that is taking place immediately adjacent to the weld, it's also a cup and cone type. That is a cone shape there and there is the cup there. This is the weld here so the fracture is taking place in the area that is being heated during the welding operation.

In this example the fracture is taking place immediately at the weld. When we examined these faces with the magnifying glass we can see that they are marks there consistent with where the chain was cropped during the manufacturing process. This suggests that the welding is incomplete, we have what's known as poor penetration and the metal has never been welded correctly when it was manufactured as a chain.

Another factor that's important in the testing is that it has highlighted differences in the quality of the galvanizing. Galvanizing applied to steel is not a coating as with a coat of paint but when it's done correctly is a series of intermetallic compounds developed between zinc and the iron, with a steadily increasing zinc content as we approach the surface. This means that when the steel is deformed, the galvanizing should not flake off but should remain adhered to the surface. Here is a good example, this has undergone 4.5 tons of force and the galvanizing has perfectly adhered to the surface of the steel. Conversely we look at this one and here the galvanizing has flaked away in several areas such as here the galvanizing will fall off and it reveals the steel substrate that's beneath. So this has not been galvanized correctly.