Chinese 
45# Carbon Steel Flat Bar | GB/T 699 A108 Gr.1045 C45 S45C Hot Rolled Carbon Flat Steel Bar
- Medium carbon grade with high tensile strength and surface hardness
- Complies with GB/T 699, matches A108 Gr.1045, C45 and S45C international grades
- Excellent hardening & tempering performance for heat treatment
- Good machinability for precision mechanical processing
- Stable metallurgical structure, customizable size & cutting service
Contact Us
Product Overview
45# Carbon Steel Flat Bar is medium carbon hot rolled flat steel manufactured according to GB/T 699 standard. Its equivalent grades include ASTM A108 Gr.1045, EN C45 and JIS S45C. This grade has medium carbon content, high strength and good hardness after heat treatment. It is widely used for mechanical transmission parts, shafts, gears, piston rods, tool brackets and heavy-duty machine components. We supply multiple width & thickness options, and provide fixed-length cutting service for global bulk orders.
Chemical & Mechanical Property Snapshot
Detailed Technical Specifications
Size Specification Table
Product Comparison Table
App Market
Reliable Steel Coil Solutions For Diverse Industrial Applications
Guardrail Flat Bar
Cable Tray Supports
Curtain Wall Embedded Parts
Product Packaging
Secure Export Packaging For Safe Handling And Delivery
FAQs
45# steel complies with GB/T 699, equivalent grades: ASTM A108 Gr.1045, EN C45 and JIS S45C.
It is used for mechanical shafts, gears, machine tools parts, piston rods and components requiring heat treatment.
Yes, it can be quenched and tempered to improve hardness and wear resistance.
MOQ is 5 tons.
Yes, SGS, BV and other third-party inspection services are available.
Related Projects
Steel And Metal Materials Supplied To Projects Worldwide.
Vietnam Binh Duong Foreign-Invested Industrial Park Project
A large-scale foreign-invested smart manufacturing industrial park was developed in Binh Duong Province, Vietnam. The project included three large-span steel structure workshops w…
Texas Commercial Warehouse & Logistics Center Project, USA
A large-scale e-commerce logistics center was constructed near Houston, Texas, USA, featuring a single-story large-span steel structure designed for modern warehousing and distribu…
Middle East Petrochemical EPC Project
A petrochemical EPC project in the Middle East involved the construction of new raw material storage tanks and shell-and-tube heat exchanger systems for an oil refining supporting …
