Sep 12, 2026News & Insights
What Is DIN 766 Stainless Steel Chain
DIN 766 stainless steel chain is a calibrated round-link chain designed for smooth engagement with boat windlasses. The DIN 766 standard defines precise link dimensions (pitch ≈ 2.8 × wire diameter),
DIN 766 stainless steel chain is a calibrated round-link chain designed for smooth engagement with boat windlasses. The DIN 766 standard defines precise link dimensions (pitch ≈ 2.8 × wire diameter), making these chains ideal for anchoring and mooring.
At Boyuan Metal, we understand the technical demands of marine environments. According to industry expertise — such as that from long‑established manufacturers like Catenificio Rigamonti — the ideal material for saltwater use is AISI 316L stainless steel. It contains molybdenum for superior resistance to pitting, crevice corrosion, and galvanic attack.
DIN 766 stainless steel chains are available in Grade 40 or Grade 50. Higher grades offer better strength‑to‑weight ratios — crucial for vessel performance.
Whether for a yacht, workboat, or permanent marina mooring, a calibrated DIN 766 chain ensures quiet, safe anchoring. Boyuan Metal provides high‑quality stainless steel marine chains tailored to your needs.
Sizes and Weights
Our DIN 766 chain is produced from 2 mm up to 32 mm diameter. Inside width runs from about 3.5 mm to 43 mm and unit weight from roughly 0.07 kg/m up to about 23 kg/m across the range; the smaller calibrated sizes are the ones used on windlasses.
Grades and Materials
DIN 766 stainless steel chains are available in Grade 40 or Grade 50, and in SUS304, AISI316 or AISI316L stainless steel. AISI316 is the choice for permanent salt water exposure.
Related DIN 766 Products
Beyond the stainless windlass chain, we supply the same DIN 766 chain as electro galvanized carbon steel chain and as a stainless steel swing chain - same standard, different materials and finishes for different environments.
Frequently Asked Questions
What sizes does DIN 766 stainless chain come in?
Our DIN 766 production covers 2 mm to 32 mm diameter, with the smaller calibrated sizes used on windlasses and the larger sizes for mooring and general marine duty.
Which stainless grade should I choose?
SUS304 suits general marine use; AISI316 or AISI316L is the choice for permanent salt water exposure. Tell us where the chain will work and we will confirm the grade.
Is DIN 766 chain calibrated?
Yes - the standard defines precise link dimensions so the chain engages smoothly with windlass gypsies, as described at the top of this guide.