CARBON STEEL · CHANNEL SECTION Q235B Carbon Steel ChannelGB/T 706 Hot-Rolled U-Channel (UPE / UPN) A classic structural section with flat, parallel flanges — the economical choice for purlins, cadres, supports, machinery and vehicle chassis. STANDARD: GB/T 706 GRADE: Q235B SIZE: 5# – 40# YIELD STRENGTH≥235 MPa TENSILE STRENGTH370–500 MPa SECTION HEIGHT50–400 mm 01 · PRODUCT OVERVIEW Q235B channels are hot-rolled to GB/T 706 with a U-shaped cross-section, parallel flanges and a straight web. They combine good bending strength in one plane with an easy flat surface for bolting and welding, making them a first choice for secondary structural members across construction and industry. WHY CHOOSE Q235B CHANNEL One material, un grade – Q235B seulement. Hot-rolled from billet with stable…
Canal en acier au carbone Q235B GB/T 706 Hot-Rolled U-Channel (UPE / UPN)
A classic structural section with flat, parallel flanges — the economical choice for purlins, cadres, supports, machinery and vehicle chassis.
STANDARD: GB/T 706GRADE: Q235BSIZE: 5# – 40#
RÉSISTANCE D'ÉLÉGEMENT
≥235 MPa
RÉSISTANCE À LA TRACTION
370–500 MPa
SECTION HEIGHT
50–400 mm
01 · APERÇU DU PRODUIT
Q235B channels are hot-rolled to GB/T 706 with a U-shaped cross-section, parallel flanges and a straight web. They combine good bending strength in one plane with an easy flat surface for bolting and welding, making them a first choice for secondary structural members across construction and industry.
WHY CHOOSE Q235B CHANNEL
Un matériau, un grade – Q235B seulement. Hot-rolled from billet with stable chemistry, consistent section geometry and guaranteed mechanicals; available in full range from 5# à 40#.
02 · PRINCIPALES CARACTÉRISTIQUES
One-Plane Bending Strength
High section modulus about the strong axis — ideal as purlins, beams and joists.
Easy Connection
Flat parallel flanges give clean bolting and welding surfaces for fast on-site assembly.
Full Weldability
Q235B welds cleanly in all positions — no pre-heat needed for ordinary shop welding.
Stable Mechanicals
Hot rolling delivers consistent yield and tensile values verified by mill certificate.
Cost Efficient
Efficient material layout and economical rolling cost — a low-cost structural workhorse.
Full Size Range
From 50×37×4.5 (5#) to 400×104×14.5 (40#), stocked in 6 m, 9 m et 12 m de longueur.
03 · COMPOSITION CHIMIQUE (Analyse de distribution, %) -Q235B
Élément
C
Et
Mn
P.
S
Contenu maximum
0.20
0.35
1.40
0.045
0.045
Note: Les valeurs correspondent à l'analyse de distribution maximale en pourcentage. Des certificats de test en usine accompagnent chaque lot.
04 · PROPRIÉTÉS MÉCANIQUES
Propriété
Valeur
Méthode d'essai
Limite d'élasticité (ReH)
≥ 235 MPa
GB/T 228.1
Résistance à la traction (Chambre)
370 – 500 MPa
GB/T 228.1
Élongation (UN)
≥ 26 %
GB/T 228.1
Impact Charpy (20 °C)
≥ 27 J.
GB/T 229
Dureté
≈ 121 HBW
GB/T 231.1
RÉSISTANCE À LA TRACTION — COMPARAISON DES QUALITÉS COMMUNES
Q235B Channel (370–500 MPa)GAMME
Q355B (470–630 MPa)PLUS HAUT
05 · PROPRIÉTÉS PHYSIQUES
DENSITÉ
7.85 g/cm³
POINT DE FUSION
≈ 1510 °C
MODULE D'ÉLASTICITÉ
200 – 210 GPa
RAPPORT DE POISSON
0.3
06 · SPÉCIFICATIONS COMMUNES (Selected Sizes)
Taille #
Dimensions h×b×d (mm)
Poids (kg/m)
Longueur (m)
5#
50×37×4.5
5.44
6 / 9 / 12
6.3#
63×40×4.8
6.63
6 / 9 / 12
8#
80×43×5.0
8.05
6 / 9 / 12
10#
100×48×5.3
10.01
6 / 9 / 12
12#
120×53×5.5
12.06
6 / 12
14#
140×60×6.0
14.53
6 / 12
16#
160×65×6.5
17.24
6 / 12
20#
200×73×7.0
22.64
6 / 12
Full range up to 40# (400×104×14.5, 67.6 kg/m) available. Other sizes and lengths produced to order.
07 · DEMANDES
Steel building purlins & roof members
Cadres, supports & socles de machines
Bridge secondary members & gantries
Vehicle chassis & châssis de remorque
Tours de transmission & prend en charge
Stairs, plates-formes & passerelles
08 · TRAITEMENT & CONDITIONNEMENT
Coupe à longueur, forage, galvanizing and painting available. Channels bundled and steel-banded, with end protection for export shipping.
LIVRAISON
Sea or land freight, documentation d'exportation complète (CI, PL, CO, MTC) et supervision du chargement assurée.
Need Q235B channel for your project?
Tell us the size #, length and quantity — we will confirm stock, prix et livraison dans 24 heures.
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