Carbon Steel · Steel Plate

Placa de acero laminada en caliente Q235B

General-purpose hot rolled carbon steel plate with proven strength and weldability — the economical workhorse for structural fabrication, machinery and heavy construction.

Estándar: GB/T 700 · GB/T 3274 Finalizar: Laminado en Caliente Thickness 2–200 mm

Fuerza de producción

≥235 MPa

Resistencia a la tracción

370–500 MPa

Ancho

1000–2500 mm

01 · Descripción general del producto

The economical all-purpose structural plate

Q235B hot rolled steel plate is a low-carbon structural plate produced to GB/T 700 and supplied per GB/T 3274. The hot rolling process forms a characteristic mill-scale surface and delivers consistent plate geometry, flatness and through-thickness mechanical properties.

Offering dependable strength, easy welding and outstanding value, Q235B plate is the standard choice for building structures, bridge fabrication, general machinery, tanques de almacenamiento, ship components and heavy welded assemblies — available in thicknesses from 2 mm a 200 mm with full cutting and processing support.

02 · Características clave

Why choose Q235B steel plate

Dependable Strength

Minimum yield of 235 MPa with tensile 370–500 MPa — verified performance for structural and load-bearing applications.

Outstanding Weldability

Low carbon equivalent suits all common welding processes and makes field fabrication fast and trouble-free.

Excelente formabilidad

Bends, rolls and presses cleanly in all directions — ideal for tanks, cae, guards and formed components.

Wide Size Range

2–200 mm thickness, 1000–2500 mm width, arriba a 12 m length — plus plasma and laser cutting to your drawing.

Consistent Flatness

Controlled leveling delivers flat plates with square, clean-cut edges ready for immediate fabrication.

Certified & Traceable

Mill test certificates, heat numbers and batch traceability provided; third-party inspection welcome.

03 · Composición química

Composición química (% en peso) — GB/T 700 Q235B

Elemento	Carbón (C)	Silicio (Y)	Manganeso (Minnesota)	Azufre (S)	Fósforo (PAG)
Contenido	≤ 0.20	≤ 0.35	≤ 1.40	≤ 0.045	≤ 0.045

Nota: single values are maximum limits per GB/T 700. Residual copper ≤ 0.30%. El análisis de calor se aplica a muestras de cuchara..

04 · Propiedades mecánicas

Propiedades mecánicas (thickness ≤ 16 milímetros)

Propiedad	Límite elástico ReH	Sala de resistencia a la tracción	Elongación A	Impacto (20°C)	Dureza (aprox.)
Valor	≥ 235 MPa	370 – 500 MPa	≥ 26%	≥ 27 j	~ 121 HBW

Tensile strength — common structural plate grades comparison (MPa)

Q235B (este producto)370 – 500

A36 (ASTM)400 – 550

S275JR (EN 10025)410 – 560

Q355B (low alloy)470 – 630

05 · Propiedades Físicas

Propiedades físicas

Densidad7.85 gramos/cm³

Punto de fusión≈ 1,510 °C

Módulo de elasticidad≈ 206 GPa

ratio de Poisson0.30

Conductividad térmica (100°C)~ 50 con/(m·K)

resistividad eléctrica (20°C)~ 0.17 µΩ·m

Coeficiente de expansión lineal~ 12×10⁻⁶ /°C

Acabado superficialMill scale / negro

06 · Especificaciones comunes

Tamaños comunes & presupuesto

Espesor (milímetros)	Ancho (milímetros)	Longitud (milímetros)	Tolerancia	Superficie
2, 3, 4, 5, 6	1000 / 1250 / 1500	2000 / 2500 / 3000	GB/T 709	Mill scale
8, 10, 12, 16	1500 / 2000 / 2200	6000 / 8000 / 12000	GB/T 709	Mill scale
20, 25, 30, 40	2000 / 2200 / 2500	6000 / 12000	GB/T 709	Mill scale / shot blasted
50, 60, 80, 100, 120, 150, 200	2000 / 2200 / 2500	Corte personalizado	GB/T 709	Mill scale

Plasma, laser and water-jet cutting to custom shapes available. Extra-wide plates and cut-to-size service on request.

07 · Aplicaciones

Where Q235B steel plate is used

Building structures, columns and beams
Bridges, steel platforms and towers
General machinery and equipment frames
Tanques de almacenamiento, silos and pressure vessels
Shipbuilding and offshore components
Heavy welded assemblies and chassis

08 · Procesamiento & embalaje

Servicios de procesamiento & embalaje de exportación

Tratamiento

Plasma / laser / water-jet cutting
Doblar, laminación & formando
Perforación & puñetazos
Shot blasting & derusting (Sa2.5)
Priming & cuadro
Edge milling & beveling

embalaje

Bare bundles with steel straps
palet de madera / crate for sea freight
Water-proof wrapping on request
Labels with grade, tamaño & heat no.
Certificado de prueba de molino (MTC) suministrado
3Inspección de terceros aceptable

Need Q235B steel plate cut to size?

Envíanos tu espesor, ancho, length and cutting requirements — we reply within 24 hours with a competitive quote and delivery plan.

Solicitar una cotización