Grade 43 Proof Coil
Also referred to as Grade 40, System 4 or Grade 4
Grade 43 High Test IS NOT RATED for OVERHEAD LIFTING by OSHA.
Welded Link Chain
Grade 43 High Test Markings
Grade 43 can be marked 4, 40, 43, G4, G43 or simply have anything with a 4 embossed on the link. There may be a letter before the number (like D4 or D43) which is usually a manufacturer’s ID code.
Grade 43 Proof Coil Surface Finishes
Self Colored – also known as SC (for self colored; the chain’s manufacturing process is complete after it gets welded), Shot Peened (a shot blast cleaning technique used by the manufacturers after the welding process), BP (for bright polished; a cleaning technique used by the manufacturers using a tumbler after the welding process)
Zinc Plated – otherwise known as ZP, EG or Electro Galvanized which provides a modest rustproofing, but is shiny and is great for retail
Hot Dip Galvanized – otherwise known as HDG or Hot Galvanized and provides the best rust proof coating of the three
Stainless Steel Proof Coil – While technically unfinished, it is a highly corrosion resistant material. Available in Type 304 or Type 316. Stainless steel is a material, not a finish.
Grade 43 High Test Common Uses
Trailer Chains
Lock Chains
Crowd Control
General use that is not critical in nature or for OHL
Welded Link Chain
Stainless Steel Proof Coil Common Uses
Commonly used in wastewater, chemical, nuclear, marine and other corrosive environments. Also commonly used at amusement parks for crowd control.