Petersen Stainless Rigging Limited, Cowen Road, Blaydon-on-Tyne, Tyne & Wear, NE21 5TW, UK
Email:   Tel: +44 (0)191 4140156   Fax: +44 (0)191 4990041


Our lifting shackles are primarily manufactured from two different grades of stainless steel used specifically for different applications. The application and environment will determine which type of shackle should be used. Information on these can be found below. Besides these we can manufacture shackles in a wide variety of materials such as Duplex 1.4462 (31803), Super Duplex 1.4501 (F55 / S32760), 904L (1.4539 / UNS N08904) and 316Ti 1.4571 among others. We also produce ‘Low Mag Shackles’ with low magnetic permeability below ug1.05 for military applications including to a number of standard NATO pattern numbers. Please contact us for more details

Shackles for General Lifting Applications

Petersen PH shackles are made from PH 17/4, a martensitic precipitation/age hardening 17% chromium, 4% nickel stainless steel, offering high strength and hardness together with excellent corrosion resistance. PH shackles are heat treated to between condition H1025 and condition H1075 to achieve the optimum balance of mechanical properties and resistance to corrosion: in this state PH 17/4 closely approaches stainless types 302 and 304 for most corrosion agents.

Because of the critical dependence of the strength/corrosion characteristics on the heat treatment process it is imperative that no attempt is made to anneal Petersen PH shackles for whatever reason.

Technical Information Analysis
(typical analysis of PH 17/4)
Carbon 0.07% max
Manganese 1.00% max 
Silicon 1.00% max 
Phosphorus 0.04% max
Sulphur 0.03% max 
Chromium 15.50 – 17.50% 
Nickel 3.00 – 5.00% 
Columbium & Tantalum   0.15 – 0.45% 
Copper 3.00 – 5.00% 
Iron to 100% 
Mechanical Properties
   Minimal  Typical
Ultimate Tensile
 10,900 kg/cm2 (H1025)
to 10,190kg/cm2 (H1075)
 11,810 kg/cm2 (H1025)
to 11,530kg/cm2 (H1075)
 Yield Strength 10,190 kg/cm2 (H1025)
to 8,790kg/cm2 (H1075) 
 11,390 kg/cm2 (H1025)
to 10,410kg/cm2 (H1075)

Box of ShacklesShackle in operation



Shackles with a Higher Resistance To Corrosion

Technical Information Analysis (typical analysis of EN1008803 1.4404)
Carbon 0.03% max 
Chromium  16-18%
Nickel  10-13%
Manganese                    2.0% max
Silicon  1.0% max
Sulphur  0.03% max
Phosphorus  0.04% max
Molybdenum                                2.0 – 3.0%
Iron  to 100%

Hi-MOD E Pin shackles (D and Bow) are manufactured from ISO 1.4404 stainless steel and are proof-tested to twice their Working Load Limit (WLL) using equipment calibrated to BS EN 10002-2 and NAMAS NIS 0424.

Petersen stainless steel E Type shackles should be used in applications where corrosion resistance is of significant importance. Stainless steels are possible solutions to corrosion problems and are ideally suited to natural (water, city and landscape atmospheric) conditions. Petersen stainless steel E Type shackles should NOT be used in general lifting applications where corrosion resistance is not required. For such general lifting applications please refer to the Petersen PH range of lifting shackles. Due to the nature of stainless steel and the possibility of work hardening/stress ageing, we strongly recommend that thorough inspection and maintenance is carried out on a regular basis.

Petersen stainless steel E Type shackles (D and Bow) are made from EN10088-3 1995 1.4404 stainless steel, a work hardening Austensitic stainless steel.  Because of the critical dependence of the strength characteristics on the mechanical history of the material the shackles should not be used if distorted in any way, it is imperative that no attempt is made to straighten or modify the shape of these shackles for whatever reason.

Stainless steel grade EN10088 1.4404 is an iron-chromium-nickel alloy which is hardenable by cold working. Nickel is the main element varied within the alloys of this class while carbon is kept to low levels. This grade is slightly magnetic in the cold-worked condition, but is essentially non-magnetic in the annealed condition. The austenitic types of stainless steel feature adaptability to cold forming and in general, the highest corrosion resistance. Type 316 (EN10088 1.4404) stainless steel contains molybdenum for better corrosion resistance – particularly to pitting.

Please refer to EN 10088-3 1995 for chemical analysis and typical mechanical properties of 1.4401 and 1.4404 steel, which are also commonly known as grade 316 and 316L.


 ForgingGrain StructureMachineUpset Forged Bar


Blaydon Blocks: High Corrosion Resistance & LightWeight

Blaydon Blocks are particularly useful for riggers working on high towers and lines where weight to be carried is of prime importance. The materials used have been specially selected to maximise corrosion resistance and maintain a well engineered, high integrity block.

The sheaves are manufactured from hard anodised Aluminium, thus allowing the use of steel wire ropes with minimal damage to the sheaves. The upper locating block and eye are manufactured from stainless steel grade 316.

The upper locating eye and block are manufactured from a solid piece of stainless steel ensuring that there are no unncecessary welds, thus resulting in a very strong, high integrity product. The cheeks are manufactured from a special type of Tufnol which again results in a strong, reliable product.





Petersen Stainless Rigging Limited, Cowen Road, Blaydon-on-Tyne, Tyne & Wear, NE21 5TW, UK
Tel: +44 (0)191 4140156   Fax: +44 (0)191 4990041