MECHANICAL PROPERTIES

IACS W22
OFFSHORE MOORING CHAIN
API ORQ
R3
R3S
R4
R4S
R5
Required
Required
Required
Required
Required
Required
Ultimate Tensile Strength, MPA min* / N/mm2
641
690
770
860
960
1000
Yield Strength, MPA min* / N/mm2
-
410
490
580
700
760
Elongation, % min
17
17
15
12
12
12
Reduction of Area, % min
40
50
50
50
50
50
Charpy V-notch Impact Test
(Average Absorbed Energy in Joules)
Test Temperature, Celsius
-20
0    -20
0    -20
-20
-20
-20
Parent Material
40
65    40
65    45
55
56
58
Weld Zone
30
53    30
53    33
36
40
42
Break Test Load, STUD LINK CHAIN, kN
0.0211*M
0.0223*M
0.0249*M
0.0274*M
0.0304*M
0.0320*M
Proof Test Load, STUD LINK CHAIN, kN
0.0140*M
0.0156*M
0.0180*M
0.0216*M
0.0240*M
0.0251*M
Break Test Load, STUDLESS CHAIN, kN
0.0211*M
0.0223*M
0.0249*M
0.0274*M
0.0304*M
0.0320*M
Proof Test Load, STUDLESS CHAIN, kN
0.0140*M
0.0156*M
0.0174*M
0.0192*M
0.0213*M
0.0223*M
Pitch Length
Five Link Measure
Minimum
22d
Maximum
22.55d

d = nominal chain diameter.
* Aim value of yield to tensile ratio: 0.92mm.
M = d2(44-0.08d)