Chain , Iran

Steel chain is classified by strength grades, ranging from 3 to 120. Grades 30, 43, 70, 80, 100, and 120 are the most common. Grade 80, with 800 N/mm² tensile strength, is the lifting industry standard. Raw materials include medium carbon steel, alloy steel, or heat-treated steel. Manufacturing involves electric flash welding and full heat treatment. The bar diameter forming the chain varies from 6 to 32 millimeters. Quality control testing includes loading to 2.5 times the working load limit. Higher-grade chains offer greater tensile strength for the same diameter.

Grades 30 and 43 are for general use like tie-down and binding. Grades 70, 80, and 100 are mandatory for lifting and crane applications. Grade 120 serves specialized heavy-duty and marine industries. Coatings include hot-dip galvanized, epoxy paint, or self-colored uncoated. Grade selection depends on the required safety factor typically 4:1 or 5:1. Each grade is identifiable by specific color codes or link markings. Periodic chain inspection for over 10% wear of the original diameter is critical. Service life is heavily influenced by fatigue loading and corrosive environments.You can order and buy Chain from Iran by contacting us through whatsaap and email.
WEBSITE: Chain Iran