Attention
Connecting links do not show equal strength in all directions and must be operated at loads directed along their axes (lengthwise).
The link is used in the anchor handling arrangements of ships and floating facilities in Arctic conditions under temperatures down to -50 °C. Chains and accessories in Arctic versions of grades 2W and 3W are made of special alloy steel with subsequent heat treatment.
Connecting links do not show equal strength in all directions and must be operated at loads directed along their axes (lengthwise).
Materials
2W – alloy steel;
3W – alloy steel with additional heat treatment.
External coating
BIT – bitumen paint, 1 layer, ISO 12944-5
Standard
ISO 1704
Strength characteristics meet Class Rules including IACS design, construction and operation standards.
Operation temperature
-30 °С; -40 °С; -50 °С.
| Chain grade | 2W(-30) | 2W(-40) | 3W(-30) | 3W(-40) | 3W(-50) |
|---|---|---|---|---|---|
| Ultimate tensile strength, MPa, not less than | 490–690 | 490–690 | 690 | 690 | 690 |
| Contraction at break, %, not less than | – | – | 40 | 40 | 40 |
| Elongation at break, %, not less than | 22 | 22 | 17 | 17 | 17 |
| Impact energy KV, J, not less than | 27 | 27 | 35 | 35 | 35 |
| Impact bending test temperature, °C | -30 | -40 | -30 | -40 | -50 |
Olga Sharonova
