### 1. Yield Strength ntawm Q195 Hlau
Lub **yield zog ntawm Q195 steel yog 195 MPa **. Tus nqi no yog txiav txim siab los ntawm kev sim ntawm 16mm steel bar. Rau steel tuav nrog diameters ntawm 16mm thiab 40mm, lub zog tawm los yog 185 MPa.
### 2. Peb qib ntawm cov yeeb nkab steel
Cov qauv sib txawv txhais tau ntau qib. Piv txwv li, ** ASTM A252 specification rau steel yeeb nkab pawg muaj peb qib **:
- ** Qib 1**: Yield Strength Ntau dua lossis sib npaug li 205 MPa (30,000 psi)
- ** Qib 2**: Yield Strength Ntau dua lossis sib npaug li 240 MPa (35,000 psi)
- ** Qib 3**: Yield Strength Ntau dua lossis sib npaug rau 310 MPa (45,000 psi)
Lub caij no, lub ** ASTM A106 specification rau seamless steel yeeb nkab nrog rau lwm txheej ntawm peb qib **, feem ntau siv rau siab - kub kev pab cuam:
- ** Qib A**
- ** Qib B**
- ** Qib C**
### 3. Class A thiab Class B Pipe
Hauv cov ntsiab lus ntawm ** ASTM A106 seamless steel yeeb nkab **, uas yog siv rau kev thauj cov dej xws li dej, roj, thiab roj nyob rau hauv qhov kub thiab txias:
- ** Qib A** yog piv rau Tuam Tshoj tus 10 # steel thiab feem ntau yog siv rau qis - qhov chaw siab lossis qhov chaw txias txias yog qhov tseem ceeb. Nws muaj qhov tsawg kawg nkaus tawm lub zog ntawm 205 MPa.
- ** Qib B ** yog piv rau Tuam Tshoj tus 20 # steel thiab haum rau qhov kub thiab txias ib puag ncig. Nws muaj qhov siab tshaj qhov ua tau zoo ntawm 240 MPa.
### 4. ASTM A252 Specification
** ASTM A252 ** npog cov qauv tshwj xeeb rau ** welded thiab seamless steel yeeb nkab pawg **. Hauv daim ntawv thov no, cov yeeb nkab steel lub tog raj kheej ua haujlwm ua haujlwm ruaj khov- nqa cov tswv cuab lossis ua lub plhaub los ua cov cam khwb cia- hauv - tso cov pob zeb ua vaj tse. Cov kev qhia tshwj xeeb suav nrog cov kev xav tau rau cov khoom siv kho tshuab (xws li lub zog tensile thiab lub zog tawm los) thiab tshuaj lom neeg muaj pes tsawg leeg, tshwj xeeb tshaj yog txwv cov ntsiab lus phosphorus. Nws tseem suav nrog kev tso cai hloov pauv ntawm phab ntsa tuab, qhov hnyav, thiab txoj kab uas hla, nrog rau kev ntsuas cov cai.
### 5. Qhov txawv ntawm ASTM A106 thiab A252
Qhov tseem ceeb sib txawv yog nyob rau hauv lawv ** npaj siab thov **:
- ** ASTM A106** qhia ** seamless carbon steel yeeb nkab ** rau ** siab -kev pabcuam kub **. Nws yog tsim los siv rau hauv kev xa dej, roj, thiab roj hauv qhov kub thiab txias.
- ** ASTM A252 ** qhia ** welded lossis seamless steel yeeb nkab pawg **. Cov no yog siv los ua **cov qauv tsim** hauv kev tsim kho, xws li hauv cov tsev thiab cov phab ntsa tuav, qhov twg cov yeeb nkab ua haujlwm ruaj khov- nqa cov tswv cuab.
