Q355B Placă de oțel de înaltă rezistență cu aliaj scăzut GB/T 1591 Structural Steel Plate
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
FORTA DE CANDIDAT
≥355 MPa
REZISTENȚĂ LA TRACȚIUNE
470-630 MPa
IMPACT ENERGY
≥34 J @ −20°C
01 · PREZENTARE GENERALĂ A PRODUSULUI
Q355B is a low-alloy high-strength structural steel to GB/T 1591, micro-alloyed with niobium, vanadiu și 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
Un singur material, one grade — Q355B only. Micro-alloyed chemistry, guaranteed 355 MPa yield, certified impact toughness and full traceability via mill certificate.
02 · CARACTERISTICI CHEIE
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.
Certified Quality
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.
Nota: 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.
Laminat la cald, mill scale surface; shot-blasted & primed, or oiled, available on request
Custom width, lungime, edge preparation and profiling available — specify your requirement in the inquiry.
07 · APLICAȚII
Steel bridges & gantry structures
Building frames & high-rise columns
Engineering machinery & cranes
Constructii navale & marine structures
Pressure vessels & storage tanks
Wind power towers & heavy equipment
08 · PRELUCRARE & AMBALARE
Flame / tăierea cu plasmă, împușcare, edge milling and painting available. Plates packed on steel or wooden pallets, steel-banded and protected for ocean shipment.
LIVRARE
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, lăţime, length and quantity — we will confirm stock, pret si livrare in termen 24 ore.
PROGRESUL
