Carbon Steel · Steel Plate

Q235B warmgewalzte Stahlplatte

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

Standard: GB/T 700 · GB/T 3274 Beenden: Warmgewalzt Thickness 2–200 mm

Streckgrenze

≥235 MPa

Zugfestigkeit

370–500 MPa

Breite

1000–2500 mm

01 · Produktübersicht

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, Lagertanks, ship components and heavy welded assemblies — available in thicknesses from 2 mm bis 200 mm with full cutting and processing support.

02 · Hauptmerkmale

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.

Hervorragende Formbarkeit

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

Wide Size Range

2–200 mm thickness, 1000–2500 mm width, bis zu 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 · Chemische Zusammensetzung

Chemische Zusammensetzung (Gew.-%) — GB/T 700 Q235B

Element	Kohlenstoff (C)	Silizium (Und)	Mangan (Mn)	Schwefel (S)	Phosphor (P)
Inhalt	≤ 0.20	≤ 0.35	≤ 1.40	≤ 0.045	≤ 0.045

Notiz: single values are maximum limits per GB/T 700. Residual copper ≤ 0.30%. Die Wärmeanalyse gilt für Pfannenproben.

04 · Mechanische Eigenschaften

Mechanische Eigenschaften (thickness ≤ 16 mm)

Eigentum	Streckgrenze ReH	Zugfestigkeit Rm	Dehnung A	Auswirkungen (20°C)	Härte (ca.)
Wert	≥ 235 MPa	370 – 500 MPa	≥ 26%	≥ 27 J	~ 121 HBW

Tensile strength — common structural plate grades comparison (MPa)

Q235B (dieses Produkt)370 – 500

A36 (ASTM)400 – 550

S275JR (IN 10025)410 – 560

Q355B (low alloy)470 – 630

05 · Physikalische Eigenschaften

Physikalische Eigenschaften

Dichte7.85 g/cm³

Schmelzpunkt≈ 1,510 °C

Elastizitätsmodul≈ 206 GPa

Poissonzahl0.30

Wärmeleitfähigkeit (100°C)~ 50 W/(m·K)

Elektrischer Widerstand (20°C)~ 0.17 µΩ·m

Längenausdehnungskoeffizient~ 12×10⁻⁶ /°C

OberflächenbeschaffenheitMill scale / Schwarz

06 · Allgemeine Spezifikationen

Gängige Größen & Spezifikationen

Dicke (mm)	Breite (mm)	Länge (mm)	Toleranz	Oberfläche
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	Custom cut	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 · Anwendungen

Where Q235B steel plate is used

Gebäudestrukturen, columns and beams
Bridges, steel platforms and towers
General machinery and equipment frames
Storage tanks, silos and pressure vessels
Shipbuilding and offshore components
Heavy welded assemblies and chassis

08 · Verarbeitung & Verpackung

Verarbeitungsdienstleistungen & Exportverpackung

Verarbeitung

Plasma / laser / water-jet cutting
Biegen, rollen & Bildung
Bohren & Stanzen
Shot blasting & derusting (Sa2.5)
Priming & Malerei
Edge milling & beveling

Verpackung

Bare bundles with steel straps
Holzpalette / crate for sea freight
Water-proof wrapping on request
Labels with grade, Größe & heat no.
Mühlenprüfzertifikat (MTC) geliefert
3Inspektion durch Dritte akzeptabel

Need Q235B steel plate cut to size?

Senden Sie uns Ihre Dicke, Breite, length and cutting requirements — we reply within 24 hours with a competitive quote and delivery plan.

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