ASTM A773/A773M - 21

## ASTM A773/A773M-21: Electrical Engineering Standard### OverviewASTM A773/A773M-21 is the latest edition of the standard specification for Seamless and Welded Austenitic Stainless Steel Tubing for General Service. This standard, developed by ASTM International, provides detailed technical requirements and test methods for austenitic stainless steel tubing used in a variety of electrical engineering applications.### Key Specifications- Covers seamless and welded austenitic stainless steel tubing in NPS 1/8 to 12 (DN 6 to 300) and wall thicknesses from 0.028 to 0.375 in. (0.71 to 9.53 mm)- Specifies chemical composition, mechanical properties, dimensions, and tolerances- Includes requirements for heat treatment, surface condition, and testing procedures- Applicable for general service applications in the electrical, chemical, and other industries### Benefits of Compliance- Ensures consistent quality and performance of stainless steel tubing- Supports the design and manufacture of reliable electrical equipment and systems- Facilitates international trade and collaboration through standardized specifications- Helps mitigate risks associated with material selection and procurement### Technical RequirementsThe ASTM A773/A773M-21 standard outlines the following key technical specifications:**Chemical Composition:**- Chromium: 16.0-18.0%- Nickel: 8.0-12.0%- Carbon: ≤ 0.08%- Manganese: ≤ 2.00%- Silicon: ≤ 1.00%- Phosphorus: ≤ 0.045%- Sulfur: ≤ 0.030%**Mechanical Properties:**- Tensile Strength: 75,000-100,000 psi (515-690 MPa)- Yield Strength: 30,000 psi (205 MPa) min.- Elongation: 35% min.**Dimensions and Tolerances:**- Outside Diameter: Specified size ±0.005 in. (0.13 mm)- Wall Thickness: Specified size ±10%**Heat Treatment:**- Solution annealed at a minimum temperature of 1900°F (1040°C)**Testing Requirements:**- Chemical analysis- Tensile testing- Flattening test- Reverse bend test- Hardness test### ConclusionASTM A773/A773M-21 is a critical standard for electrical engineers and manufacturers working with austenitic stainless steel tubing. By ensuring compliance with this specification, you can be confident in the quality, performance, and reliability of your electrical components and systems. Contact us today to learn more about how this standard can benefit your business.