Q235 H-beam is manufactured according to GB/T 700 and GB/T 706 standards. It is one of the most widely used structural carbon steels in China, known for its stable mechanical properties, excellent weldability, and cost-effectiveness.
Q235 steel includes four sub-grades-Q235A, Q235B, Q235C, and Q235D-which mainly differ in impact test requirements and chemical composition, but all maintain the same minimum yield strength of 235 MPa for thin sections.
Q235 H-beams are ideal for building frames, industrial plants, warehouses, bridges, prefabricated structures, and general engineering applications.
Q235 Steel Grades Overview (A / B / C / D)
Although all belong to the Q235 family and share similar strength levels, the sub-grades differ in impact toughness and working temperature:
| Grade | Impact Test Requirement | Test Temperature | Absorbed Energy (≥ J) | Typical Use |
|---|---|---|---|---|
| Q235A | No impact requirement | – | – | General-purpose structures |
| Q235B | Impact test | 20°C | 27 J | Most common for construction steel |
| Q235C | Impact test | 0°C | 27 J | Buildings in colder regions |
| Q235D | Impact test | -20°C | 27 J | Low-temperature engineering |
Mechanical Properties of Q235 Steel
| Thickness (mm) | Yield Strength ≥ (MPa) | Tensile Strength (MPa) | Elongation (%) |
|---|---|---|---|
| T ≤ 16 | 235 | 370–500 | 26 |
| 16 < T ≤ 40 | 225 | 370–500 | 25 |
| 40 < T ≤ 60 | 215 | 370–500 | 24 |
| 60 < T ≤ 100 | 205 | 370–500 | 22 |
| 100 < T ≤ 150 | 195 | 370–500 | 21 |
| 150 < T ≤ 200 | 185 | 370–500 | – |
(Thicker sections naturally have lower yield strength due to rolling characteristics.)
Product Description – Q235 H-Beam
Product Name:
Q235 Hot Rolled Structural H-Beam / Universal Beam
Brand:
Gnee
Material:
Q235A / Q235B / Q235C / Q235D
(Q235B is the most commonly supplied grade)
Technique:
Hot Rolled / Welded
Standard:
GB/T 700, GB/T 706 (Equivalent to: ASTM A36 in performance but not identical)
Available Sizes:
Height: 100–912 mm
Flange Width: 50–302 mm
Thickness: 5–34 mm
(Custom sizes available)
Length:
1–12 m (customizable to 18–24 m on request)
Surface Treatment:
Black / Painted / Galvanized
Applications:
Steel building frames
Industrial factory columns
Prefabricated steel structures
Bridges & walkways
Equipment supports
Shipbuilding & machinery parts
Why Choose Q235 H-Beam?
✔ Cost-effective structural steel
Lower material cost while maintaining stable mechanical performance.
✔ Excellent weldability
Low carbon content (≤0.22%), suitable for all common welding processes.
✔ Good plasticity and toughness
Reliable for bending, fabrication, and structural connection work.
✔ Wide dimensional availability
Complete range for light, medium, and heavy-duty structural needs.
✔ Suitable for large-scale construction
Especially popular in Asia and projects using GB standards.
