S235JRH Square Hollow Section Description
S235JRH falls under the category of carbon structural steel and is specifically designed for load-bearing structures such as buildings and bridges. It is a carbon structural steel designed for load-bearing structures such as buildings and bridges, combining high strength with good processability.
Material and Standard:
EN10210 (Standard for hollow sections for cold-formed welded structures), covering dimensions, tolerances, and process requirements.
Explanation of grades:
S235: indicates a minimum yield strength of 235MPa;
JRH: The suffix 'J' stands for impact test temperature of 0℃, 'R' for rolled state, and 'H' for high-frequency welding process. The 'H' refers to the high-frequency welding process.
Chemical composition:
Carbon (C) ≤ 0.17%, manganese (Mn) ≤ 1.60%, silicon (Si) ≤ 0.35%, phosphorus (P) ≤ 0.035%, sulfur (S) ≤ 0.035%.
The low alloy content balances strength and weldability.
Mechanical properties:
Yield strength: ≥235MPa;
Tensile strength: 360-510MPa;
Elongation: ≥21% (SD 5.65√S₀)
Common specifications: side length range 20×20mm to 400×400mm, wall thickness 1.5 to 16mm.
Tolerance control: outside diameter deviation ±1%, wall thickness deviation ±10% (in accordance with EN10210 standard)
Selection and Precautions
Environmental adaptability:
Corrosion resistance: applicable to non-strong corrosive environments, humidity or salt spray scenes require surface galvanised or painted protection.
Low-temperature toughness: impact test temperature 0 ℃, suitable for temperate regions, cold areas are recommended to choose S355J2H and other high-toughness materials.
Processing restrictions:
Avoid excessive cold bending or welding heat-affected zone repeated processing to prevent localized strength loss.
S235JRH Square Tube Specification
| Product Name | S235JRH Square Tube |
| Standard | EN10210 |
| Grade | Q195, Q235, Q345, S235JR, St37-2 |
| Diameter | 10x10mm to 600x600mm |
| Thickness | 1-30mm or customizable |
| Length | 3-12m or as Required |
| Surface Treatment | Oiled, black painted or hot dip galvanized |
| Packing | strapped with steel strips to prevent damage from transportation,wrapped by PP cloth, |
| Applications | Structure pipe in constructions, low-pressur fluid service,bridge,highway,windows of model steel door, fence, heating facilities etc. |
| Payment Items | T/T or L/C at sight |
| Deliver Conditions | Bulk vessel or container |
| Deliver Time | In about 5-7 working days upon receipt of L/C or T/T |
FAQ
Q: What is your MOQ?
A: Generally our MOQ is 2 tons, if small quantity, we can check our stock.
Q: How long is your delivery time?
A: Generally it is 15 days if the goods are in stock. or it is 25~30 days if the goods are not in stock, it is according to quantity.
Q: Do you provide samples? Is it free or extra ?
A: Yes, we could offer the sample for free charge but do not pay the cost of freight.
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