进步
A versatile low-carbon structural profile
Q235B flat bar is a hot-rolled low-carbon steel section with a rectangular cross-section, produced to 国标/T 700. Its controlled carbon content keeps the grade highly weldable while the manganese content provides dependable yield and tensile strength for everyday structural duty.
Widely used in steel structures, machine frames, 括号, racks, railings and enclosure fabrication, Q235B flat bar offers the best cost-performance balance among ordinary structural steels — easy to cut, 钻头, bend and weld, available in a wide range of widths and thicknesses, and fully customizable in length.
Why choose Q235B flat bar
化学成分 (重量%) —GB/T 700 Q235B
| 元素 | 碳 (C) | 硅 (和) | 锰 (锰) | 硫 (S) | 磷 (磷) |
|---|---|---|---|---|---|
| 内容 | ≤ 0.20 | ≤ 0.35 | ≤ 1.40 | ≤ 0.045 | ≤ 0.045 |
笔记: 单个值是每 GB/T 的最大限制 700. 残铜≤ 0.30%. 热分析适用于钢包样品.
机械性能 (厚度≤ 16 毫米)
| 财产 | 屈服强度ReH | 拉伸强度Rm | 伸长率A | 影响 (20℃) | 硬度 (约。) |
|---|---|---|---|---|---|
| 价值 | ≥ 235 兆帕 | 370 – 500 兆帕 | ≥ 26% | ≥ 27 J | 〜 121 HBW |
物理特性
常用尺寸 & 规格
| 宽度 (毫米) | 厚度 (毫米) | 长度 | 宽容 | 边缘 |
|---|---|---|---|---|
| 20, 25, 30, 40 | 3, 4, 5, 6 | 6 米标准 | 国标/T 702 | Fully rounded / 正方形 |
| 50, 60, 80, 100 | 6, 8, 10, 12 | 6 米 / custom | ±0.5 mm (厚度) | Straight, burr-free |
| 120, 150, 200 | 12, 16, 20, 25 | Up to 12 米 | 国标/T 702 | Straight, deburred |
Sizes beyond this table, customized lengths and non-standard dimensions are available on request.
Where Q235B flat bar is used
- 钢结构, frames and light trusses
- Machine frames, bases and fabricated parts
- Racks, shelves, supports and brackets
- 桥梁, railings, guards and handrails
- Electrical cabinets and distribution enclosures
- Agricultural machinery and transport equipment
加工服务 & 出口包装
钻孔 & punching holes
弯曲 & 成型
抛丸清理 & 除锈
Painting (primer / 环氧树脂)
Hot-dip galvanizing
Woven fabric or water-proof wrap
木托盘 / 海运板条箱
带有等级的标签, 尺寸 & batch no.
工厂测试证书 (MTC) 提供的
3可接受第三方检验
Send us your width, thickness and length requirements — we reply within 24 hours with a competitive quote, stock availability and shipping options.
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