The chemical composition determines the identity and performance basis of the material; when purchasing, the grade standard, product specification range, typical values and specific batch testing values should be distinguished.
Engineering focus: Chemical composition and grade verification
Review the material, particle-size, process and validation factors that matter for this application.
Product designations must be supported by composition data.
Avoid treating industry information as a promise of delivery.
Enable COA to serve procurement release.
Confirm the identity of the material first
The grade name needs to correspond to the applicable UNS, EN, JIS, ASTM, ISO or specifications agreed upon by both parties. Internal product names cannot be forcibly applied to international grades without composition basis.
Main elements and interstitial elements are viewed separately
Chromium, nickel, copper, molybdenum, niobium, etc. determine the alloy system; carbon, oxygen, nitrogen, etc. also affect sintering, phase composition, hardness and corrosion resistance, which need to be discussed in conjunction with the process.
The COA should state the batch and method
Data used for purchasing acceptance should identify the batch, test method, units and specification limits. Typical industry compositions on this website are educational references, not Tongcheng supply specifications or commitments.
Discuss your powder project
Share the process step, operating conditions and part result you want to improve.
- Target grade, batch or order information
- Particle size, density, flow or composition items of concern
- Customer inspection methods and receiving requirements
- Packaging, labelling, delivery and traceability needs
Technical references for this page
These references explain materials, processes or test methods. Third-party product data does not represent Tongcheng product specifications.