Quote:
Originally Posted by Delfin
This is a fairly typical experience, although from what has been posted by Grant King, the problem is not QA from the Chinese, but a conscious decision on the part of Rocna to cheapen their product without acknowledging it. Until caught that is. Now, their attitude is pretty much "we'll use whatever steel we want to use in our anchors, so there!" Not a big confidence builder, that. |
Like I have said before the Chinese do exactly what they are told to do, use exactly the metal they are told to do and have done so since day 1 of making those anchors.
Some of the very first ones made were part of the shipment that included the 400mpa venice spaghetti. The whole shipment was the same material and they were made in late 2008.
Certification of seabed tests was obtained using NZ made ones with shanks of Bis80. The
china ones are nowhere near that so that voids that result.
The drawing type approval pubished on the website now has several different grades of metal listed as shank grade, some list Bis 80 ( not used) some list lower grades in order to gain approval when tests of material failed miserably to come up to test spec. Voids that as well.
The full
certification has still not been achieved no matter what type of sales spin is put into the press release to make the layman sailor think it has.
This thread , and others online, have all been about credibility and
safety , not about if it is a good
anchor or not. I know it is a good anchor, one of the best, but with the design strength being so severely compromised it has a weakness that will not show until it is sideloaded above the stress point of the shank. It will not break, the weld will not fall apart, the blade will not snap but the shank will bend and release the setting.
Peter Smith and Craig were so adamant that the alignment of the shank was absolutely critical to the setting of the anchor that any deviation of the shank from centre line of the blade more than a few mm was not acceptable was classed as a reject. The shank if it had a curve or bend of more than 1mm over 500mm length it had to be straightened.
These are critical to the success of the design working.
Also critical is the strength of the
steel both UTS ( Ultimate Tensile Strength) the point of elongation of the metal and YTS ( Yield tensile Strength) the point at which it bends. With a minimum Yield spec of 690mpa none of the tested anchors so far have come to this.
Now , with the stance of keeping quiet and being vague about metals, they will simply wait for it all to go away online and continue to manufacture as they always have and when there is a major failure they will, as before, close ranks and walk away.
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