Q355B Steel Sheet Piles

Specifications

Cross-section type	U-shaped / Z-shaped / Straight / Cold-bent M-shaped
Cross-section height	180mm – 480mm
Single length	6m – 18m
Material	Q355B
Tensile strength	500MPa-590MPa
Yield strength	≤16mm: ≥355MPa; 16-40mm: ≥345MPa; 40-63mm: ≥335MPa; 63-80mm: ≥315MPa
Interlocking type	Larsen type, ball joint type, straight web type, etc.
Connection method	Rivet connection, bolt connection
Chemical composition	C≤0.24, Si≤0.55, Mn≤1.60, P≤0.035, S≤0.035
Quality grade	Grade A
MOQ	25 TONS

Key Advantages

• High Strength and Lightweight: Q355B has a yield strength of ≥355 MPa, which is approximately 50% higher than that of Q235B. Under the same application conditions, the thickness of Q355B sheet piles can be reduced, resulting in a lighter self-weight.
• Modular Construction with Exceptional Efficiency: After interlocking, the sheet piles can be driven directly into the ground without on-site casting or curing, shortening the construction cycle by more than 50% compared to traditional concrete cofferdams.
• Reliable Water Tightness: High-quality interlocking joints combined with waterproofing materials ensure extremely low permeability, keeping the excavation pit dry.
• Reusability: Individual steel sheet piles can be reused multiple times, resulting in carbon emissions over the entire lifecycle that are significantly lower than those of cast-in-place concrete structures.

Applications

1. Excavation Shoring: Retaining walls for deep excavations such as subway stations, underground parking garages, pipeline trenches, and bridge foundations;
2. Cofferdam Construction: Temporary water-retaining structures for the construction of bridge piers, locks, and pump stations;
3. Waterway and River Management: Bank protection and slope stabilization, river widening, and dredging enclosures;
4. Permanent Structures: Quay walls, flood walls, and underground utility tunnels;
5. Tunnel Engineering: Support for cut sections in open-cut tunnel construction, and temporary or permanent retaining walls for tunnel shelters;
6. Coastal Protection: Coastal erosion control, breakwater foundations, shoreline reinforcement, and temporary storm surge barriers.

Procurement Considerations

The correct selection should be based on a comprehensive calculation of three key factors: soil bearing capacity, water pressure, and construction space, rather than relying on experience or simply comparing prices.

Common Selection Mistakes

• In one project, 600mm Z-type piles were used to replace the originally designed 400mm U-type piles → The insufficient section moment of inertia caused the pile body to deform during driving, resulting in the disengagement of the interlocking joints.
• Selecting piles with excessively thin walls to save material costs → Under soil pressure, the pile body develops “ripples,” leading to overall instability.
• Using narrow piles (width < 400 mm) in soft soil areas → The pile body sinks and shifts, making it impossible to form a continuous wall.

Selection Guidelines

Based on Soil Bearing Capacity

• Soft Soil (Silt, Fine Sand) → Prioritize wide piles (width ≥ 500 mm); if necessary, increase flange height to prevent overturning and settlement.
• Hard soil (clay, dense sand) → Standard U-shaped 400 mm series may be selected, but penetration resistance must be verified.

Based on Water Depth Pressure

• Water depth ≤ 5 m → Standard U-shaped piles (e.g., U400×125) are sufficient.
• Water depth 5–10 m → It is recommended to use thickened piles (plate thickness ≥12 mm) or Z-shaped piles, and to increase the interlock strength.
• Water depth >10 m → A combined simulation of hydrostatic and earth pressures must be performed; typically, large-section Z-shaped piles or double-layer sheet pile combinations are selected.

Based on Construction Space

• Narrow site where large equipment cannot access → Select straight (flat-plate) or cold-formed thin-walled types; construction can be performed using a small vibratory hammer.
• Existing old buildings or utility lines in the vicinity → Prioritize low-vibration hydraulic pile driving methods, and select products with uniform wall thickness and high interlock precision.

Q355B Steel Sheet Piles Price

Factors Affecting Price

1. Raw material prices: Steel sheet piles are produced from iron ore and coke; if the prices of these two raw materials fluctuate, the price of steel sheet piles will also change;
2. Specifications: The thicker and longer the steel sheet, the more steel is used, so the price per ton naturally increases;
3. Cross-Section Type: Z-shaped sheet piles are slightly more expensive than U-shaped ones because Z-shaped ones involve more complex processing and offer greater bending resistance;
4. Purchase Volume and Processing Requirements: If you purchase in bulk—for example, buying tens or hundreds of tons at a time—the price will certainly be much more cost-effective than purchasing in small batches.

Price Reference

$650–$1,100 per ton. This price is for reference only. If you have a purchase need, please contact us for a quote.

Purchasing Advice

Never be tempted by low prices and purchase sheet piles that are exceptionally cheap and lack a quality guarantee. While it may seem like you’re saving a little money, there is a high probability that the material does not meet standards or that there are dimensional deviations. This can easily lead to problems on the construction site, and the costs of rework or replacing the piles will far exceed any initial savings—making it a very poor deal.