If your project needs flexibility, controlled movement, and clean post-tension performance, an unbonded pc strand is the right choice. At Tianjin Wasungen Metal Products Co., Ltd., we manufacture unbonded prestressing strands designed for slabs, floors, and structural systems where free movement inside concrete is required.
We supply unbonded strands commonly used in post-tensioned floors, parking structures, residential slabs, and commercial buildings. Each strand is coated with corrosion-resistant grease and wrapped in a protective sheath. This prevents direct bonding with concrete while allowing the steel to move smoothly under load.
Our buyers are contractors, developers, and distributors who want stable performance without overcomplicating installation. As a trusted unbonded pc strand supplier, we focus on consistent coating, smooth sheathing, and export-ready packaging. You get material that installs easily, stresses cleanly, and performs the way your design expects.
Unbonded strands are chosen when movement control matters more than surface bonding. They help structures flex without cracking under load.
Here’s what makes our unbonded strands practical on site:
Grease-coated steel core – reduces friction during stressing
Protective plastic sheath – isolates steel from concrete
Controlled movement – allows post-tension adjustment
High tensile strength steel – supports structural loads
Seven-wire strand design – stable stress distribution
Reduced cracking risk – helps slabs perform better over time
Easy installation – no bonding treatment required
Consistent factory coating – smooth stressing operation
Many engineers choose pc strand unbonded systems for slabs and floors because they allow stress redistribution and reduce long-term cracking issues.
We manufacture and supply different prestressing strand types to meet various design and environmental needs. Each type is produced under strict control so quality stays consistent across orders.
Unbonded strands are mainly used in post-tension systems, while other strand types serve bonding or corrosion-resistant applications.
Available subcategories and products include:
Unbonded PC Strand
Unbonded PC strand 12.7mm
Epoxy-coated PC strand 12.7mm
Epoxy-coated PC strand 15.2mm
Epoxy-coated PC strand 15.7mm
Hot-dipped galvanized PC strand 12.7mm
Indented PC strand 12.7mm
Indented PC strand 15.2mm
Low Relaxation PC Strand
Low relaxation PC strand 12.7mm
If you’re unsure whether bonded or unbonded systems suit your project, we’ll help you decide before ordering.
Here’s how unbonded prestressing strand is used, explained simply:
The strand is laid inside concrete formwork
A plastic sheath separates the steel from concrete
Concrete is poured and cured
Tension is applied after curing
The strand moves freely, adjusting stress across the slab
This system is widely used in floors and slabs because it allows flexibility and helps control cracking without rigid bonding.
We manage the entire process in-house.
High-carbon steel wire is drawn and cleaned
Wires are twisted into seven-wire strands
Corrosion-resistant grease is applied evenly
Plastic sheathing is extruded over the strand
Coating continuity is checked
Tensile strength and elongation are tested
Finished coils are labeled and packed for export
Each batch is traceable, so performance stays consistent order after order.
Our unbonded strands meet common prestressing requirements used worldwide.
Typical specifications:
Diameter: 12.7mm
Structure: Seven wire strand
Coating: Grease + plastic sheath
Application: Post-tension systems
Relaxation class: standard or low relaxation
Supported standards:
ASTM A416
EN 10138
GB/T 5224
Mill test reports are supplied with every shipment.
We export unbonded pc strands to multiple regions through stable logistics routes.
South America:
Argentina, Bolivia, Brazil, Chile, Colombia, Ecuador, Guyana, Paraguay, Peru, Suriname, Uruguay, Venezuela
Central Asia:
Kazakhstan, Kyrgyzstan, Tajikistan, Turkmenistan, Uzbekistan
If your country isn’t listed, ask us. We regularly arrange custom shipments.
We’ve worked with buyers who struggled with inconsistent coating and installation issues. That experience shapes how we manufacture today.
Why customers choose us:
Direct unbonded pc strand manufacturer
Stable grease coating and sheathing
Smooth stressing performance
Flexible order volumes
Export experience across regions
Clear and fast communication
We focus on supply you can rely on, not just pricing.
Send us the strand type, diameter, quantity, and destination port. We’ll respond fast with pricing, lead time, and packing details. No guessing. No pressure.
Request your PC strand quote today.
Unbonded PC strand is mainly used in post-tension slabs, floors, and parking structures where controlled movement and crack control are needed.
Unbonded strand is isolated from concrete by grease and sheathing, allowing movement, while bonded strands grip concrete directly.
Yes. It’s widely used in residential and commercial slabs to help control cracking and improve load distribution.
12.7mm is the most common size we supply for unbonded systems. Other options can be discussed if required.
Yes. We regularly ship to both regions and handle export packing and documentation.
Yes. Mill test reports and inspection documents are provided with every order.
