JB/T 15270-2026Internal combustion engines - Powder metallurgy valve seat inserts - Metallographic inspections (English PDF)

JB/T 15270-2026 is the English-translated version of 内燃机粉末冶金气门座金相检验.

The document sets out the metallographic inspection of powder metallurgy valve seat inserts used in internal combustion engines. A valve seat insert is the ring pressed into a cylinder head against which the valve closes, and powder metallurgy is the process by which such parts are made from sintered metal powder. The standard concerns the examination of the microstructure of these parts.

It is used by makers of valve seat inserts, engine manufacturers, metallographic and test laboratories, and buyers who set acceptance conditions for these parts. It is a voluntary industry standard, shown by the /T in its code. It was issued by the Ministry of Industry and Information Technology on 13 February 2026 and takes effect on 1 September 2026. It is a new standard.

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

1. 1

   Add to cart

   Click "Download PDF" on this page and choose "Buy this standard". You can add more standards before checkout.

2. 2

   Checkout

   Enter your email and billing details. Payment is processed securely by Stripe (cards or bank transfer). Prefer bank details? Request a quotation (min. order $300).

3. 3

   Instant delivery (0–9 sec)

   Delivery is automatic: within seconds of payment you'll receive an email with a secure download link. The link stays valid for 72 hours.

4. 4

   Invoice included

   A tax invoice is attached to the confirmation email. Need a custom invoice? Contact us.