Cromox Stainless Steel 318LN DIN 766 Duplex Windlass Anchor Chain 8mm by 10'

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Cromox STAINLESS STEEL318LN DIN 766 Duplex Windlass Chain 8mm or 5/16" by 10' 

This is a quality, high grade,marine stainless steel (AISI 318LN Duplex) DIN766 chain specificallymanufactured for use in a windlass as anchor chain or other marine applicationswhere high corrosion resistance is desired. Superb for anchor chain, liftingchain and general heavy duty work in a marine or chemically harsh environment.

The link size is 8mm or 5/16”imperial equivalent. This listing is for one ten foot length. Every 3 feet links are hallmarked "Cromox" on the otherside a traceability code currently "A5".  The Cromox brand stands for innovative quality made by KettenWalder GmbH. 

This 318 Duplex Stainless SteelAnchor Chain has the same measurement specifications as the Suncor S0601-0008 and fully complies with DIN 766. This Cromox Duplex chain has a Working Load Limitrating more than twice that of 316 chain and is considerably more corrosionresistant.

Chain size: 8mm x 24mm.See detailed specifications below. Ifyou are intending to use this chain with a windlass please check therequirements of your windlass gypsie to ensure it accepts metric (DIN 766) chain. Some manufacturers call this chain "BBB".

G4 and G43 are both Imperialspecifications and all are different. Some imperial gypsies have difficultieswith metric chain.

This chain does not pile in thechain locker like a galvanized chain does, the brightpolish finish allows the chain to fill the chain locker with considerably lesspiling. The bright finish also helps the chain to come up from a muddy bottomcleaner, as mud and dirt does not stick to the chain as easily as regularchain.

Why Duplex? The major benefit for going to ahigher grade duplex chain is that the weight of chain being carried can bereduced for no reduction in strength.

Duplexstainless steels are extremely corrosion resistant, work hardened alloys. Theirmicrostructures consist of austenite and ferrite phases. As a result, duplexstainless steels display properties characteristic of both austenitic (304 istypical) and ferritic (430 is typical) stainless steels. Strengths of duplexstainless steel are typically double the strength of austenitic stainlesssteels.  Duplex also has improvedresistance to localized corrosion, particularly pitting, crevice corrosion and stress corrosion cracking. They are characterizedby high chromium (21-23%) and molybdenum (2.5 – 3.5%) and lower nickel (4.5% -6.5%) contents than austenitic stainless steels.

Duplexsteels are also magnetic, a property than can be used to easily differentiatethem from common austenitic grades of stainless.

This chain meets or exceeds allstandards for DIN766 and is calibrated for use in a windlass or gypsie. Thechain is proof tested, calibrated and bright polished.

AISI 318LN Duplex stainless isthe premium grade of marine stainless and is considered by many to be best inclass. 318 stainless is corrosion resistant and very durable even in theharshest of conditions.

This chain has a pittingresistance number (PREN or PRE) of 35. Pitting or pitting corrosion is a formof localized corrosion that leads to the creation of small holes in the metal.The higher the PRE the more corrosion resistance the steel has. This chain ishighly corrosion resistant even in low oxygen environments.

This chain is graded G60 and isproof tested at two and a half times the working load limit. This chain isideal for heavy duty work and has a higher tensile strength than G30 or G40stainless and is rated for overhead lifting.

Manufactured from AISI 318LNStainless Steel.  This Cromox Duplex chainis significantly stronger than Commercial Stainless Steel Chain (304, 316 and430). This duplex chain is rated for overhead lifting.

Each chain has been subjected toa Proof Load of two and a half times the Working Load Limit. Each chain isstamped with the batch number and test certificates are available fortraceability and conformance purposes.

Suggested applications:

Windlass Calibrated Chain (foruse in Gypsies), Tie Down Chain, Shade Sails, Dragging Chains, Sewage PumpLifting Chain, Other applications where standard commercial chains is notsuitable.

Item will ship via USPS.

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Cromox 318LN Stainless Windlass  Chain Specifications DIN766

Stainless Steel


Tensile Test

318LN Duplex Grade 60

d mm

t  mm

b1 min mm

b2 max mm

wgt lb/ft


BL (lb)

8mm or 5/16"








10mm or 3/8"









d = Diameter of material (or wire size or D)

BL = Breaking Load in KiloNewtons (or Minimum Breaking Load)

t or IL = Inside Length (also commonly called Pitch or L)

PL = Test Load in KiloNewtons

b2 or OW = Outside Width

WWL = Working Load Limit in lbs (also called Safe Working Load)