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represents 10 times the ratio between the lower yield stress (or proof stress) and nominal tensile strength. For class 8.8, the yield strength is 80% of the tensile strength (approx. 640 MPa). Testing Parameters Mandated by JIS B 1051
Varies from Vickers (HV), Brinell (HB), or Rockwell (HRC) depending on the class, with minimums to ensure proper load-bearing capacity.
It generally does not apply to special fasteners like set screws, tapping screws, or fasteners requiring specific weldability or corrosion resistance. Key Technical Specifications and Property Classes jis b1051 pdf free
When designing, manufacturing, or sourcing mechanical fasteners for engineering projects, the Japanese Industrial Standards (JIS) framework is a globally recognized benchmark for quality and compatibility. Among these standards, is one of the most critical. It governs the mechanical properties of fasteners made of carbon steel and alloy steel, specifically targeting bolts, screws, and studs.
It is the Japanese equivalent of the international standard . If you are working with automotive parts, heavy machinery, or electronics designed in Japan, this standard ensures that the bolts used can handle the required structural loads without failing. Key Technical Specifications in JIS B 1051
Do you need a specific or tensile strength value for a particular bolt grade? If you are working on a specific engineering
Fasteners under JIS B 1051 are designated by numbers such as .
These corporate standards management platforms allow businesses to subscribe to bundles of up-to-date international standards legally.
The Japanese Standards Association (JSA) Webdesk provides a free preview (typically including the scope and some tables). Testing Parameters Mandated by JIS B 1051 Varies
In modern engineering, . The Japanese Standards Association frequently updates its catalogs to match International Organization for Standardization (ISO) protocols to facilitate smoother international trade.
Standards are updated periodically to reflect safer manufacturing techniques and material sciences. A free PDF found on a file-sharing site may be an obsolete version, leading to compliance errors.