PC Steel Strand Grades and Standards: A Technical Guide to 77B and 82B for Engineers
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- publisher
- Junnan Steel
- Issue Time
- Jul 27,2026
Summary
A technical comparison of PC steel strand grades 77B and 82B, including grade names from product records, applicable standards (GB, ASTM, JIS, ISO, BS), surface options, and guidance for selecting the right grade for prestressed concrete projects.
Grade names from product records
For engineers and procurement professionals working with prestressed concrete, selecting the right steel grade is a fundamental design decision. Product records in this group list two grades: 77B and 82B, with applicable standards including GB, ASTM, JIS, ISO, and BS. The product group size range is 4.8 mm to 14 mm, with diameters such as 12.7 mm appearing in product titles for 7-wire strand configurations. The group data also contains the attribute wording spiral ribbed PC wire and indented PC wire; confirm surface wording for the selected product.
Low relaxation appears in product tags across this group, and one verified product brief description also mentions it.
Grade 77B in product records
Grade 77B appears in product attributes across multiple records in this group. It is listed alongside both GB and ASTM standards in product brief descriptions, within the product group size range of 4.8 mm to 14 mm. The grade name is referenced in brief descriptions and attribute fields.
Grade 82B in product records
Grade 82B also appears in product attributes across this group. Some product records reference both 77B and 82B, while others list only one grade. The specific grade to use depends on the project design and applicable standard requirements.
Applicable standards from product records
The product records in this group list the following international standards:
- GB — Chinese national standard
- ASTM — American standard
- JIS — Japanese industrial standard
- ISO — International standard
- BS — British standard
Confirm the applicable standard and grade combination for your project when placing an order, as requirements may vary.
Low relaxation in product records
Low relaxation appears in product tags across this group, and one verified product brief description also mentions it. This wording is presented as a product-record label, not as a quantified performance specification. Confirm whether the selected strand or wire product is offered with this characteristic, together with its applicable grade, standard, surface wording, and size.
Quality and documentation
Inspection and documentation details for this product group are covered in the existing published FAQ. Ask for the required documentation when submitting your inquiry.
How to specify your grade and standard
When preparing your inquiry for PC steel strand, include the following information:
- Required grade: 77B or 82B
- Applicable standard: GB, ASTM, JIS, ISO, or BS
- Product type: strand or wire
- Diameter and structure
- Surface wording for the selected product
- Quantity in metric tons
This guide is based on product records available for PC steel strand. Confirm grade and standard requirements with your supplier for your specific project.