CARBON STEEL · CHANNEL SECTION

Q235B Carbon Steel Channel
ギガバイト/トン 706 Hot-Rolled U-Channel (UPE / UPN)

A classic structural section with flat, parallel flanges — the economical choice for purlins, フレーム, 括弧, machinery and vehicle chassis.

標準: ギガバイト/トン 706 GRADE: Q235B SIZE: 5# – 40#

降伏強度

≥235 MPa

抗張力

370–500MPa

SECTION HEIGHT

50–400 mm

01 ・製品概要

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

一つの素材, one grade — Q235B only. Hot-rolled from billet with stable chemistry, consistent section geometry and guaranteed mechanicals; available in full range from 5# に 40#.

02 · 主な機能

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 and 12 m lengths.

03 ・化学組成 (Cast Analysis, %) — Q235B

要素	C	と	ん	P	S
最大コンテンツ	0.20	0.35	1.40	0.045	0.045

注記: Values are maximum cast analysis in percent. Mill test certificates accompany each batch.

04 · 機械的特性

財産	価値	試験方法
降伏強さ (ReH)	≥ 235 MPa	ギガバイト/トン 228.1
抗張力 (RM)	370 – 500 MPa	ギガバイト/トン 228.1
伸長 (あ)	≥ 26 %	ギガバイト/トン 228.1
Charpy Impact (20 ℃)	≥ 27 J	ギガバイト/トン 229
硬度	≈ 121 HBW	ギガバイト/トン 231.1

引張強さ - 一般的なグレードの比較

Q235B Channel (370–500MPa)範囲

Q355B (470–630 MPa)より高い

05 · 物理的特性

密度

7.85 g/cm3

融点

≈ 1510 ℃

弾性率

200 – 210 GPa

POISSON’S RATIO

0.3

06 ・共通仕様 (Selected Sizes)

サイズ #	Dimensions h×b×d (んん)	Weight (kg/m)	長さ (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