HRB400 Rebar 8mm Q235B

HRB400 Rebar 8mm Q235B

This table compares key parameters of HRB400 8mm rebar (specialized for concrete reinforcement) and Q235B steel (versatile structural material), highlighting their distinct strengths for coordinated use in construction.

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Product details

HRB400 Rebar 8mm is a premium high-strength deformed steel bar, engineered to deliver superior structural reinforcement in concrete construction projects. As a widely specified grade in reinforced concrete (RC) applications, this 8mm diameter rebar combines exceptional tensile strength with reliable ductility, making it a cornerstone of modern building, infrastructure, and civil engineering projects. While distinct from Q235B (a general carbon structural steel), HRB400 rebar is often used alongside such materials in composite structures, offering complementary performance where high load-bearing capacity is critical.

Parameter	HRB400 Rebar 8mm	Q235B Steel	Unit	Remarks
Material Grade	HRB400 (High-Strength Deformed Steel Bar)	Q235B (Carbon Structural Steel)	—	Both comply with Chinese national 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%	—	Alloying elements in HRB400 enhance strength
Diameter/Section	8	N/A (varies by form: sheet, bar, etc.)	mm	Standard diameter for rebar; Q235B available in multiple forms
Weight per Meter	0.395	N/A (varies by section)	kg/m	Calculated for 8mm rebar; Q235B weight depends on shape/thickness
Length Range	6000–12000 (customizable)	6000–12000 (customizable)	mm	Standard lengths for construction applications
Yield Strength (Minimum)	≥400	≥235	MPa	Key strength indicator; HRB400 offers higher load capacity
Tensile Strength	540–680	375–500	MPa	Typical range at room temperature
Elongation (δ5, Minimum)	≥16	≥26	%	Ductility measure; Q235B offers greater flexibility
Impact Toughness	≥34 (at 20°C)	≥27 (at 20°C)	J	Longitudinal specimens; resistance to sudden loads
Surface Treatment	Deformed (ribbed) for concrete bonding	Mill finish, galvanized, or painted	—	HRB400 ribs improve concrete adhesion
Manufacturing Standard	GB 1499.2-2018	GB/T 700-2006	—	Compliance with Chinese structural steel standards
Typical Applications	Reinforced concrete structures (beams, slabs, columns, bridges)	General structural components (frames, supports, light-duty fabrication)	—	Complementary use in construction projects