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Bolt Strength Grade Comparison 4.8 8.8 10.9 12.9 Mechanical Performance Guide

Bolt Strength Grade Comparison 4.8 8.8 10.9 12.9 Mechanical Performance Guide

bolt Strength Grade Analysis and Application Guide

Strength grade is the key index for industrial bolts. Choosing proper grade can avoid deformation and fracture under different load conditions.

Performance Comparison

Grade Material Tensile Strength Heat Treatment Application
4.8 Carbon Steel 400MPa No Light equipment and common brackets
8.8 High Quality Carbon Steel 800MPa Quenched & Tempered General industrial machinery
10.9 Alloy Steel 1000MPa Full heat treatment Construction machinery, vehicle parts
12.9 High Strength Alloy Steel 1200MPa Deep heat treatment Heavy machinery and high pressure structures

Summary

We supply full range bolts from grade 4.8 to 12.9. All products are manufactured according to national standards with strict quality inspection, suitable for various industrial assembly projects.