HRB400 Rebar 20mm Q235B

HRB400 Rebar 20mm Q235B

This table details the technical specifications of HRB400 20mm rebar (specialized for medium-duty concrete reinforcement) and Q235B steel (versatile structural material), emphasizing their complementary roles in balanced construction projects.

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Product details

HRB400 Rebar 20mm, paired with Q235B structural steel, forms a practical and reliable combination for a wide range of construction projects. This 20mm diameter high-strength rebar delivers robust reinforcement for concrete structures, while Q235B—a versatile carbon steel—complements it in secondary components, creating a system that balances strength, flexibility, and cost-effectiveness.

Parameter	HRB400 Rebar 20mm	Q235B Steel	Unit	Remarks
Material Grade	HRB400 (High-Strength Deformed Reinforcing Bar)	Q235B (Carbon Structural Steel)	—	Both comply with Chinese construction standards
Chemical Composition	C ≤0.25%, Si ≤0.80%, Mn ≤1.60%, P ≤0.045%, S ≤0.045%, with trace Nb, V, Ti	C ≤0.20%, Si ≤0.35%, Mn ≤1.40%, P ≤0.045%, S ≤0.045%	—	HRB400 contains alloying elements for enhanced strength
Diameter/Section	20	N/A (varies by form: bars, sheets, profiles)	mm	20mm standard diameter for rebar; Q235B available in multiple forms
Weight per Meter	2.47	N/A (varies by section/thickness)	kg/m	Calculated for 20mm rebar; Q235B weight depends on specific form
Length Range	6000–12000 (customizable)	6000–12000 (customizable)	mm	Standard lengths for construction and fabrication needs
Yield Strength (Minimum)	≥400	≥235	MPa	HRB400 provides higher load-bearing capacity for critical structures
Tensile Strength	540–680	375–500	MPa	Typical range at room temperature
Elongation (δ5, Minimum)	≥16	≥26	%	Q235B offers greater ductility for flexible applications
Impact Toughness	≥34 (at 20°C)	≥27 (at 20°C)	J	Longitudinal specimens; resistance to sudden impact loads
Surface Treatment	Deformed (ribbed) for enhanced concrete bonding	Mill finish, galvanized, or painted	—	HRB400 ribs ensure strong mechanical interlock with concrete
Manufacturing Standard	GB 1499.2-2018	GB/T 700-2006	—	Adheres to Chinese national standards for structural materials
Typical Applications	Reinforced concrete structures (beams, columns, slabs, medium-load foundations)	General structural components (frames, supports, brackets, light fabrication)	—	Often used together in coordinated construction systems