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Help CenterSteel Sheet & Plate & Steel Sheet Pile，Q235B、SS400、Q355B、Q355C、Q390B、S355GP、Q355NQR、ASTM A690、SMA500
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1. Product Overview
Steel Sheet Pile is special engineering section steel with continuous interlocking locks on both sides. Adjacent piles interlock tightly to form a continuous impermeable retaining & water barrier wall. It is divided into two main categories: Hot Rolled Steel Sheet Pile and Cold Formed Steel Sheet Pile, complying with national standards GB/T 20933-2021 Hot Rolled Steel Sheet Piles and JG/T 196-2018 Steel Sheet Piles.
It integrates high strength, superior water tightness and reusable recyclability. Construction requires minimal earth excavation with small occupation area and short construction period. Widely applied in municipal deep foundation pits, water conservancy cofferdams, port docks, river flood control, bridge caps, underground pipe galleries and temporary marine structures, serving as core retaining material for geotechnical, hydraulic and marine engineering.
Water & Soil Retaining Working Principle
Integrated precision locks on both sides interlock continuously to form closed anti-seepage walls. Lock gaps can be filled with water stop paste or bentonite to achieve zero leakage against underground, river and seawater high water head erosion. The integral section features high bending stiffness, usable alone or combined with H-beams for composite support to resist lateral soil and water pressure. After construction, piles can be pulled out by vibratory hammers for repeated recycling, greatly cutting overall project cost.
2. Product Classification, Section Types & Application Scenarios
(1) By Manufacturing Process
Hot Rolled Steel Sheet Pile (HRSP, Mainstream for Large Projects)Formed by hot rolling heated steel billets, featuring dense metallographic structure, high lock interlocking precision, large section modulus, strong bending resistance, seawater corrosion resistance and long service life. Suitable for deep cofferdams over 10m, deep foundation pits, permanent quay walls and marine engineering, reusable multiple times.Sections: U-type (Larsen Type Ⅲ/Ⅳ), Z-type, straight web type
Cold Formed Steel Sheet Pile (CRSP)Roll-formed from steel strips at ambient temperature, thin wall, low cost and flexible sizes. Inferior lock tightness compared to hot rolled piles, only for shallow foundation pits, short-term temporary cofferdams and small farmland hydraulic projects.Sections: U-type, Z-type, hat type
(2) Main Section Profiles
U-Type Steel Sheet Pile (Larsen Pile, Highest Market Demand)Symmetrical U cross-section with locks on both webs, easy lifting, driving and extraction. Standard models: SP-Ⅲ, SP-Ⅳ, 400×125, 600×180Application: Conventional foundation pits 8–12m deep, river cofferdams, bridge caps, metro trenches
Z-Type Steel Sheet PileLocks arranged on outer flanges, higher section modulus and stronger bending capacity with equal steel consumption, ideal for ultra-deep foundation pits, deep-water docks and large flood dykes. Wider effective width reduces total pile quantity.
Straight Web Steel Sheet PileFlat cross-section with primary water stop function and weak bending resistance, used for anti-seepage partitions, temporary water barriers and impermeable curtains.
3. Main Steel Grades & Mechanical Performance
1. Carbon Structural Steel (General Temporary Works)
Q235B, SS400Minimum yield strength ≥235MPa, good plasticity for soft soil and shallow short-term cofferdams
2. High Strength Low Alloy Steel (Main Hot Rolled Grade for Deep Pit/Hydraulic/Marine Works)
Q355B, Q355C, Q390B, S355GPMinimum yield strength ≥345MPa, qualified low-temperature impact toughness for high soil/water pressure and coastal projects
3. Weathering / Marine Special Steel (Permanent Docks, Long-Term Seawater Immersion)
Q355NQR, ASTM A690, SMA500, alloyed with Cu, Cr, Ni to resist seawater salt fog and extend outdoor service life
Equivalent International Export Grades
EN Standard: S270GP, S355GP; ASTM Standard: A328, A572 Gr50; JIS Standard: JIS G3114 SMA400/500
4. Complete Specification Parameters
Effective Width: 400mm, 500mm, 600mm, 700mm, 750mm
Web Depth: 125mm, 155mm, 180mm, 200mm, 300mm, 450mm
Wall Thickness Range: Cold formed 6–12mm; Hot rolled 10–24mm
Standard Single Length: 6m, 9m, 12m, 15m, 18m, 24m, custom arbitrary lengths available
Surface Delivery Conditions
As-hot-rolled black scale (standard finish, preferred for rental & recycling)
Shot blasted descaled surface (ready for anti-corrosion painting for permanent structures)
Custom hot-dip galvanized / epoxy coated (seawater & chemical heavy corrosion environments)
Composite Support Scheme: Steel sheet pile + H-beam composite system to greatly improve overall rigidity for high-risk ultra-deep pits
Dimensional Tolerance Control
Lock clearance, web straightness and torsion strictly controlled per national standard to guarantee smooth driving and tight water-tight splicing; length tolerance 0~+100mm, thickness tolerance ±0.5mm.
5. Complete Production Process of Hot Rolled Steel Sheet Pile
Steel billet inspection → High-temperature heating in walking beam furnace → Multi-pass universal hot rolling → Precision lock forming → Laminar cooling → Straightening to correct torsion & camber → Fixed-length flame cutting → End grinding & cleaning → Full appearance & dimensional inspection → Batch sampling for physical & chemical tests → Marking of model, heat number and grade → Steel strapping, stacked with wooden spacers and warehousing
6. Mandatory Batch Inspection Standards (Sampling Test Per Heat Batch)
6.1 Physical & Chemical Mechanical Tests
Tensile test: Yield strength, tensile strength, elongation after fracture to match lateral load design of foundation pits
Charpy V-notch impact test at 0℃ / -20℃ (for low-temperature grades Q355C and above) to prevent brittle fracture during winter construction
180° cold bend test: No cracks or lamination on locks and webs to avoid deformation during pile driving
Spectrochemical analysis: Strict control over harmful impurities S and P to improve lock welding and anti-corrosion performance
Section modulus & moment of inertia test to meet mechanical calculation requirements of retaining structures
6.2 Appearance & Dimensional Inspection
Complete locks without tearing, webs free of cracks, scabs and excessive torsion; flat burr-free ends; length, width and wall thickness measured and recorded per piece.
6.3 Lock Interlocking Simulation Test
Same-model piles slide freely when spliced with uniform gaps, meeting water stop construction requirements.
7. Core Product Advantages
Excellent Water ImpermeabilityIntegrally hot rolled precision locks form tight joints; auxiliary water stop materials achieve zero leakage under high water head, no seepage risk for river and seawater cofferdams.
Reusable & Recyclable to Cut Project Cost DramaticallyPiles can be pulled out by vibratory hammers after construction, derusted and reused 5–10 times; temporary projects reduce over 70% construction waste compared with concrete retaining walls.
Fast Construction & Small Site Footprint with Minimal EarthworkVibratory / static press pile driving enables fast construction of 20–50 linear meters per day; no large slope excavation, highly adaptable to dense urban areas with intensive pipelines.
Diverse Section Options for All Geological ConditionsEconomical cold formed U-type for shallow pits; mainstream hot rolled Larsen Type Ⅳ for medium-deep pits; high-modulus Z-type for deep water & ultra-deep excavations; weathering anti-corrosion grades for permanent docks.
Flexible Structural Layout for Any Closed ShapeSplicable into rectangular, circular and irregular cofferdams to adapt to uneven contours of rivers, foundation pits and bridge piers.
Eco-Friendly & Fast Emergency Construction100% recyclable steel material without concrete curing waiting period, rapidly deployable for flood control and emergency pit reinforcement.
8. Main Application Fields
Municipal & Building Construction (Core Application)Deep foundation pit support for high-rise basements, metro tunnel trenches, underground comprehensive pipe galleries, temporary soil & water retaining for urban pipeline excavation.
Water Conservancy & River Flood Control ProjectsRiver cofferdams, river embankment reinforcement, emergency flood breach blocking, reservoir temporary construction cofferdams, farmland water conservancy dykes.
Port & Marine EngineeringQuay walls, breakwaters, temporary cofferdams for offshore wind power foundations, floating platform supports, dock water stop walls.
Road & Bridge InfrastructureBridge cap cofferdams, subgrade slope stabilization, temporary support for tunnel entrances & exits.
Emergency Rescue WorksCollapsed foundation pit reinforcement, flood dyke leakage blocking, temporary river closure barriers.
Permanent Protective StructuresUrban landscape revetments, permanent anti-seepage retaining walls, coastal anti-flood corrosion barriers.
9. Packaging, Loading Port & Lead Time
Standard Export Seaworthy PackagingPiles of same model & length stacked with wooden spacers to avoid lock collision; cross steel strapping for reinforcement, metal corner guards fitted on both ends; full stacks wrapped with waterproof plastic film and covered with blue waterproof woven cloth for moisture & rust prevention during sea transportation.
Loading Port: Tianjin Port, shipment available via Qingdao Port and Shanghai Port.
Lead Time
Regular stock cold formed U-type Q235B, Larsen Type Ⅲ: 5–7 days
Hot rolled Larsen Type Ⅳ Q355B, standard Z-type sheet piles: 8–14 days
Custom weathering steel, hot-dip galvanized anti-corrosion, extra-long 18–24m piles: 16–25 days
4. MOQ & Samples
Minimum order quantity 10 tons; 300mm standard test pieces provided free for tensile, impact and cold bend testing.
10. Supporting Quality Assurance Documents
Complete set of original Chinese & English factory certificates:
Heat slab chemical composition analysis report
Mechanical test report (tensile, low-temperature impact, cold bend)
Section dimension & lock appearance inspection data sheet
GB / EN / ASTM original material certificate, packing list, certificate of origin
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