Standard and High-Strength Hex Bolts , Iran

Standard mild steel hex bolts are typically made from low or medium carbon steel. Their common strength grade is 4.6 or 5.6 per ISO 898-1. Their ultimate tensile strength ranges between 400 and 600 MPa. They are usually finished with surface coatings like galvanized electroplating or zinc flake. Common nominal diameters range from M5 to M24 with coarse pitch threads. They are used in non-critical general-purpose applications in light structures and furniture. Quality control follows general industrial standards.

High-strength alloy steel hex bolts are made from carbon-manganese or chromium-molybdenum steel e.g., grades 8.8, 10.9, 12.9. Their ultimate tensile strength ranges from 800 to 1200 MPa, with a minimum yield strength of 640 MPa for grade 8.8. These bolts undergo heat treatment processes like quenching and tempering. Strict quality control includes tensile tests, hardness checks, and microstructure analysis. They are used in critical structural connections, heavy machinery, and automotive industries. They are often supplied uncoated or with precision coatings like dacromet.You can order and buy Standard and High-Strength Hex Bolts from Iran by contacting us through whatsaap and email.
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