ULTRA Products by Boyut – exclusive European distribution by cromox®

cromox® Stainless Steel Chain

Our cromox® Stainless Steel Chain for smooth running and reliable chain handling

The cromox® stainless steel chain is designed for anchoring systems in which clean running and consistent handling matter during deployment and retrieval. The chain is running fluently when paying out and coming back in, supporting controlled operation on board. The breaking load is higher than comparable galvanized chains.

cromox® stainless steel anchor chain for marine anchoring applications
cromox stainless steel anchor chain on winch
detail cromox stainless steel anchor chain on winch

Key performance features

  • Designed for fluent running when deploying the anchor. 
  • No galvanization burs or promontories as described for galvanized chains. 
  • Supports consistent chain handling and smooth retrieval behaviour. 
  • Spreads easily to the sides to support proper operation in the chain handling system. 
  • Breaking load higher than galvanized chains.
cromox® chain made from stainless steel side view

cromox® Stainless Steel Anchor Chain CDK/CIA, Grade 60

AISI 316L, measures acc. to DIN 766 and ISO 4565, tested, calibrated, bright polished

TypeNormDimensions (mm)Weight (kg, approx.)Safe working load (kN)Breaking force (kN)
dtb1 min.b2 min.
CDK-6 DIN 766 6 18,5 7,2 20,8 0,78 18,75 37,5
CDK-8 DIN 766 8 24,0 9,6 27,2 1,40 31,50 63,0
CDK-10 DIN 766 10 28,0 12,0 36,0 2,22 50,00 100,0
CDK-13 DIN 766 13 36,0 15,6 47,0 3,75 83,50 167,0
CDK-14 DIN 766 14 41,0 16,8 50,0 4,38 92,50 185,0
CDK-16 DIN 766 16 45,0 19,2 58,0 6,00 120,00 240,0
 
CIA-6 ISO 4565 6 18,0 8,1 21,6 0,80 18,75 37,5
CIA-8 ISO 4565 8 24,0 10,8 28,8 1,40 31,50 63,0
CIA-10 ISO 4565 10 30,0 13,5 36,0 2,29 50,00 100,0
CIA-12 ISO 4565 12 36,0 16,2 43,2 3,20 71,25 142,5
cromox® Stainless Steel Anchor Chain CXA/CXI/CXP, Grade 60 PLUS

cromox® Stainless Steel Anchor Chain CXA/CXI/CXP, Grade 60 PLUS

AISI 318LN Duplex, measures acc. to DIN 766, ISO 4565 and AS 2321, tested, calibrated, bright polished

TypeNormDimensions (mm)Weight (kg, approx.)Safe working load (kN)Breaking force (kN)
dtb1 min.b2 min.
CXA-5 DIN 766 5 18,5 6,0 17,0 0,50 12,60 25,2
CXA-6 DIN 766 6 18,5 7,2 20,8 0,78 19,25 38,5
CXA-8 DIN 766 8 24,0 9,6 27,2 1,38 33,00 66,0
CXA-10 DIN 766 10 28,0 12,0 36,0 2,22 52,00 104,0
CXA-13 DIN 766 13 36,0 15,6 47,0 3,75 88,50 177,0
CXA-14 DIN 766 14 41,0 16,8 50,0 4,32 97,50 195,0
CXA-16 DIN 766 16 45,0 19,2 58,0 5,80 132,50 265,0
CXA-18 DIN 766 18 50,0 21,6 65,0 7,50 170,00 340,0
CXA-22 DIN 766 22 64,0 27,6 83,0 11,00 225,00 450,0
CXA-26 DIN 766 26 73,0 31,2 94,0 15,00 320,00 640,0
 
CXI-5 ISO 4565 5 15,0 6,7 18,0 0,54 12,60 25,0
CXI-6 ISO 4565 6 18,0 8,1 21,6 0,80 19,25 38,5
CXI-8 ISO 4565 8 24,0 10,8 28,8 1,38 33,00 66,0
CXI-10 ISO 4565 10 30,0 13,5 36,0 2,29 52,00 104,0
CXI-12 ISO 4565 12 36,0 16,2 43,2 3,20 80,00 160,0
CXI-16 ISO 4565 16 48,0 20,8 54,9 5,70 132,50 265,0
 
CXP-6 AS 2321 6 18,8 7,2 21,6 0,78 19,25 37,5
CXP-8 AS 2321 8 23,8 9,6 27,0 1,38 33,00 63,0
CXP-10 AS 2321 10 29,8 13,0 37,0 2,29 52,00 100,0
CXP-13 AS 2321 13 38,0 15,6 43,0 3,80 88,50 167,0
CXP-16 AS 2321 16 47,8 19,2 54,9 5,62 132,50 265,0
cromox® Stainless Steel Anchor Chain CXUS, Grade 60 PLUS

cromox® Stainless Steel Anchor Chain CXUS, Grade 60 PLUS

AISI 318LN Duplex, USA G4 Standard, tested, calibrated, bright polished

TypeDimensions (mm)Weight (kg, approx.)Safe working load (kN)Breaking force (kN)
dtb1 min.b2 min.
CXUS-1/4″ 7,1 21,3 9,7 25,2 1,10 25,0 50,0
CXUS-5/16″ 9,0 26,2 11,7 31,6 1,78 40,0 80,0
CXUS-3/8″ 10,0 31,0 14,0 36,0 2,14 50,0 100,0
CXUS-1/2″ 13,0 40,4 22,1 51,0 3,79 83,5 167,0
CXUS-5/8″ 16,0 45,5 21,7 57,0 5,70 120,0 240,0
CXUS-1″ 26,0 78,5 36,0 93,0 15,20 300,0 600,0
cromox® Stainless Steel Anchor Chain CSX, Grade 70 PLUS

cromox® Stainless Steel Anchor Chain CSX, Grade 70 PLUS

AISI F255 Superduplex, measures acc. to DIN 766, tested, calibrated, bright polished

TypeDimensions (mm)Weight (kg, approx.)Safe working load (kN)Breaking force (kN)
dtb1 min.b2 min.
CSX-8 8 24 9,6 27,2 1,35 40,0 80,0
CSX-10 10 28 12,0 36,0 2,30 62,5 125,0
MaterialGradeBreaking force at 8 mm chain thickness (optimum value) (kN)PRENCPT (°C)
AISI 316L 60 63 23,10 - 28,50 24 - 27,5
AISI 318LN Duplex 60+ 66 30,85 - 38,07 27,5 - 34,5
AISI F255 Superduplex 70+ 80 37,00 - 44,00 > 70

cromox® Stainless Steel Stud Link Chain CXSL, Grade 60 PLUS

AISI 318LN Duplex, measures acc. to ISO 1704, tested, calibrated, bright polished

TypeDimensions (mm)Weight (kg, approx.)Safe working load (kN)Breaking force (kN)
dtb
CXSL-16 16 64 57,6 6,60 132,50 265,0
CXSL-19 19 76 68,4 8,50 178,00 357,0
CXSL-22 22 88 79,2 12,60 225,00 450,0
CXSL-26 26 104 93,6 17,20 320,00 640,0

Further variants (grades, materials, sizes) are available upon request.

cromox® Stainless Steel Stud Link Chain CXSL, Grade 60 PLUS

15% surcharge for bundles less than 20 m, 10% surcharge less than 50 m, optional surface treatment: electropolishing (price on request, not discountable)

Design and construction

cromox® stainless-steel chain is engineered for marine anchoring and long-term exposure to seawater. To maintain corrosion resistance, the chain should be kept clean so its protective passive surface layer can regenerate properly. As a simple routine, rinse the chain with fresh water after use, especially when it has been sitting in areas with persistent seawater contact such as the bottom of the chain locker.

Care and cleaning notes: 

  • Rinse with fresh water after use where possible. 
  • For visible “dirty spots”, the text describes cleaning using an oxalic acid + water solution (approx. 25 g per 1 liter of water) and checking progress in intervals, avoiding excessive exposure time.

Choose the correct cromox® Anchor Chain

Sail boatPower boatSail / power
Anchor weight
(kg)		Weight
(t)		Length
(feet)		Weight
(t)		Length
(feet)		Weight
(t)		Length
(feet)		Chain
Ø (mm)
5 1,0 17 1,1 17 0,7 14 5
8 2,0 23 2,2 24 1,4 20 6
12 3,8 30 4,2 31 2,7 26 6
16 6,3 35 6,9 36 4,5 31 6 - 8
21 10,2 41 11,2 43 7,3 36 8
27 14,6 47 16,0 48 10,5 41 8 - 10
35 21,5 52 23,5 54 15,6 45 10
45 30,0 58 32,9 60 21,6 51 10 - 12
60 43,0 66 47,1 68 31,0 58 12 - 13
80 63,0 73 69,0 75 45,4 63 13
100 85,0 80 93,0 83 61,0 70 14
130 123,0 90 135,0 93 89,0 78 14 - 16
160 174,0 100 191,0 103 125,0 86 16
200 262,0 113 287,0 116 190,0 98 18
250 400,0 129 438,0 133 290,0 111 18 - 20
300 550,0 144 600,0 149 400,0 125 20
360 760,0 164 830,0 169 550,0 142 22

Comparison windspeed – waterdepth – anchor chain length

WindspeedWrap length
up to 10 knots5 times the depth
up to 35 knots7 times the depth
over 35 knots10 times the depth

Benefits of Electropolishing

Electrolytic polishing is an electrochemical process for surface treatment. It reduces the microroughness and overall surface area. Therefore dirt or product remains are much more unlikely to stick to the chain. The cleanability is improved. Electrolytic polishing is also used for deburring, buffing and passivating.

The process effects a metallurgical clean surface without defects. The material's corrosion resistance is fully exploited.

Downloads

FAQs

Why choose a stainless-steel anchor chain instead of a galvanized chain?

Galvanized anchor chains rely on a zinc coating for corrosion protection. Over time, this coating can wear away through normal use and exposure to seawater. Stainless steel anchor chains do not require galvanization and therefore avoid the use of a sacrificial zinc layer. In addition, their long service life and corrosion resistance can contribute to reduced replacement frequency, making them an option for boat owners who consider durability and long-term environmental impact when selecting anchoring equipment.

What is the advantage of a higher breaking load in an anchor chain?

A higher breaking load provides a greater safety margin when the anchoring system is exposed to dynamic loads caused by wind, waves, or tidal movements. This can be particularly important for larger vessels and demanding anchoring conditions where load peaks may occur unexpectedly.

Why is chain calibration important for anchor systems?

Calibrated anchor chains are manufactured to precise dimensional tolerances to ensure compatibility with windlasses and chain-handling equipment. Proper calibration supports smooth operation, reduces the risk of jamming, and helps maintain reliable chain handling during anchoring procedures.

What is electropolishing and how can it benefit an anchor chain?

Electropolishing is an electrochemical finishing process that smooths and cleans the stainless-steel surface. The process can improve corrosion resistance, reduce surface roughness, and create a brighter finish, making the chain easier to clean and maintain in marine environments.

How should a stainless-steel anchor chain be maintained?

Routine maintenance typically involves rinsing the chain with fresh water after use and removing deposits that may accumulate during prolonged exposure to seawater. Keeping the surface clean helps preserve the stainless steel's passive protective layer and supports long-term corrosion resistance.

How do I select the correct anchor chain specification for my vessel?

The appropriate chain specification depends on factors such as vessel size, anchor weight, windlass compatibility, operating conditions, and applicable chain standards. When selecting an anchor chain, both dimensional compatibility and load requirements should be considered to ensure safe and reliable operation.

Any questions? Contact us! 
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