HC650 980DP High Strength Steel for Heavy Duty Structures

What is HC650/980DP? Naming and Core Definition

HC650/980DP is a dual-phase steel belonging to the Advanced High-Strength Steel (AHSS) family. Its naming convention directly reflects its core mechanical properties:
HC: High-strength cold-rolled flat steel for cold forming.
650: Minimum yield strength (ReH) of 650 MPa.
980: Minimum tensile strength (Rm) of 980 MPa.
DP: Dual-phase steel, whose microstructure consists of a ferrite matrix with dispersed martensite islands.
This unique microstructure gives the material ultra-high strength while maintaining good toughness and work-hardening capability.

Core Mechanical Properties and Chemical Composition

As a key focus in the steel industry, HC650/980DP achieves an excellent balance between strength and ductility. Standard mechanical properties are listed below:

Typical Application Areas

Automotive manufacturing (core application): Body safety structural parts (A-pillars, B-pillars, rocker panels), front/rear bumper beams, chassis suspension systems, seat frames, and battery pack housings.
Heavy machinery and construction: Crane booms, excavator structural parts, load-bearing beams and columns for high-rise buildings, bridge support structures.
Energy and chemical industry: High-pressure storage tanks, oil and gas pipelines, offshore drilling platform structures.
Home appliance manufacturing: High-strength support brackets for washing machine counterweights, corrosion-resistant housings for air conditioner outdoor units.