Higher yield than Q235 with micro-alloyed toughness — the weight-saving choice for bridges, buildings, machines and heavy structures.
STANDARD: GB/T 1591GRADE: Q355BTHICKNESS 2–100 mm
ERTRAGSFÄHIGKEIT
≥355 MPa
ZUGFESTIGKEIT
470–630 MPa
IMPACT ENERGY
≥34 J @ −20°C
01 · PRODUKTÜBERSICHT
Q355B is a low-alloy high-strength structural steel to GB/T 1591, micro-alloyed with niobium, Vanadium und Titan. It delivers about 50 % higher yield strength than Q235B, allowing lighter sections and reduced welding, while keeping good weldability and excellent low-temperature toughness.
WHY CHOOSE Q355B
Ein Material, one grade — Q355B only. Micro-alloyed chemistry, guaranteed 355 MPa-Ausbeute, certified impact toughness and full traceability via mill certificate.
02 · HAUPTMERKMALE
High Yield Strength
≥355 MPa yield enables thinner, lighter sections — up to ~30 % weight saving versus Q235 designs.
Excellent Weldability
Low carbon equivalent (CEV) keeps HAZ hardness low — weldable without pre-heat in most shop conditions.
Low-Temperature Toughness
Guaranteed ≥34 J at −20 °C (grade B) for safe service in cold climates and dynamic loading.
Weight Saving
Higher design stress cuts plate thickness and tonnage, reducing material, freight and fabrication cost.
Zertifizierte Qualität
Mill test certificate with full chemistry and mechanicals supplied for every batch; third-party inspection available.
Cut-to-Size
Plasma and flame cutting to drawing — plates, blanks and profiled parts ready for use.
Notiz: Micro-alloy elements Nb, V, Ti added singly or in combination per GB/T 1591. Cu ≤ 0.40 %, N ≤ 0.012 %, Al ≥ 0.015 %. Mill test certificate supplied with every batch.
Warmgewalzt, mill scale surface; shot-blasted & primed, or oiled, auf Anfrage erhältlich
Custom width, Länge, edge preparation and profiling available — specify your requirement in the inquiry.
07 · ANWENDUNGEN
Steel bridges & gantry structures
Building frames & high-rise columns
Engineering machinery & Kräne
Schiffbau & marine structures
Pressure vessels & Lagertanks
Wind power towers & schweres Gerät
08 · VERARBEITUNG & VERPACKUNG
Flame / Plasmaschneiden, Kugelstrahlen, edge milling and painting available. Plates packed on steel or wooden pallets, steel-banded and protected for ocean shipment.
LIEFERUNG
Sea freight with full export documentation (CI, PL, CO, MTC, third-party inspection if required) and loading supervision.
Need Q355B plate for your structure?
Tell us thickness, Breite, length and quantity — we will confirm stock, Preis und Lieferung innerhalb 24 Std..
FORTSCHRITT
