Rebar materials are primarily categorized into carbon steel and alloy steel. Carbon steel includes plain round bars (HPB) and ribbed bars (HRB), while alloy steel primarily consists of threaded bars.
Carbon Steel Materials
Plain Round Bar (HPB)
Material: Low carbon steel (e.g., Q235), carbon content ≤ 0.25%
Applications: Non-load-bearing areas such as stirrups, distributor bars, and small components
Ribbed Bar (HRB)
Material: Medium carbon steel or low alloy steel (carbon content 0.25%-0.45%)
Applications: Main reinforcement in load-bearing structures, bridges, high-rise buildings, and other load-bearing areas
Alloy Steel Materials
Mainly threaded bars, with a higher carbon content (0.3%-0.8%) and added elements such as manganese and silicon for increased strength, are suitable for long-span bridges and core load-bearing structures in high-rise buildings.

Stainless steel wire is made from stainless steel through a drawing process. Material Classification:
Main materials include 304, 316L, and 2205. 304 is austenitic stainless steel with excellent corrosion resistance. 316L is reinforced with molybdenum for seawater corrosion resistance and does not require annealing after welding, making it suitable for precision applications. 2205 duplex stainless steel combines high strength and corrosion resistance.