Cov kev faib cov txheej txheem ntawm tooj liab thiab tooj liab alloys
Tam sim no, ntau hom npe uas tau siv dav hauv kev lag luam cov ntaub ntawv suav nrog:
1. Suav teb (GB);
2. American Society for Testing and Materials standards (ASTM):
3. Japanese Industrial Standards (JIS);
4. German National Standard (DIN)
5. European Community (EU) cov qauv (EN).
Cov txheej txheem hais saum toj no cov qauv kev sawv cev qib tuaj yeem muab sau ua peb pawg loj:
1. Kev faib tawm: Sau npe raws li pawg ntawm tooj liab liab, tooj dag, tooj liab thiab dawb tooj liab. Xws li Tuam Tshoj (GB);
2. Intuitive formula: Sau nrog cov cim tshuaj ntawm lub caij thiab nws cov ntsiab lus. Xws li European Community (EU) cov qauv (EN);
3. Digital code: sawv cev los ntawm cov tsiaj ntawv + tus lej. Xws li American ASTM thiab Japanese JIS.
