** 1. Dab tsi yog st37 cov khoom siv yeeb nkab? **
St37 yog ib qho khoom siv roj carbon hlau teev nyob hauv qab German tus qauv ** DIN 17100 **. Nws yog cov qauv tsis-alloy txheej txheem hlau nrog lub zog tsawg kawg ntawm 370 MPa (li "37" nyob rau hauv lub npe). ST37 kav yog feem ntau siv rau hauv kev tsim kho, tshuab, thiab cov ntawv thov qis dua vim yog lawv cov txiaj ntsig zoo weldability thiab formatability.
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** 2. Dab tsi yog tus lej St37? **
St37 yog ib tug qib ntawm cov hlau me me hauv qab ** DIN 17100 ** tus qauv. Cov "st" sawv ntsug rau * stahl (steel) *, thiab "37" txhais tau nws qhov tsawg kawg tensile lub zog ntawm 370 MPa. Nws yog cov hlau tsis-alloy nrog lub zog me me, haum rau cov qauv txheej txheem, kav dej, thiab qhov chaw uas yuav tsum tau ua vuam muag lossis vuam.
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** 3. Dab tsi yog hom kab hlau? **
"Hom e" feem ntau yog hais txog ** hluav taws xob-ua welded (ERW) steel yeeb nkab ** nyob rau hauv cov qauv zoo li ** ASTM A53 **. Piv txwv li, ASTM A53 hom E cov qauv tsim lag luam tsim los ntawm cov txheej txheem ERW. Cov kav dej no tau siv rau kev siv tshuab thiab kev siv siab, nrog rau kev siv tib yam hauv chav, dej, thiab roj.
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** 4. Cov khoom siv twg yog ST37.4 ua los ntawm? **
St37.4 yog ib qho txawv ntawm St37 teev nyob rau hauv ** DIN 1629 ntu 4 ** rau cov hlau uas tsis tshua muaj. Nws muaj cov cim sib xws rau cov qauv st37, nrog cov ntsiab lus raug:
- ** PARBON (c): ** Tsawg dua lossis sib npaug rau 0. 17%
- ** MANAGUSE (MN): ** 0. 35 - 0. 65%
- ** silicon (si): ** Tsawg dua lossis sib npaug rau 0. 40%
- ** Phosphorus (P): ** Tsawg dua lossis sib npaug ntawm 0. 045%
- ** SENULFUR (S): ** Tsawg dua lossis sib npaug rau 0. 045%
Nws yog siv rau cov hlab ntsha siab, boilers, thiab kev siv kho tshuab engineering.
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** 5. Dab tsi yog ASTM sib npaug rau st37? **
Qhov ze tshaj plaws ** rau ST27 yog ** AVTM A36 **, lub zog zoo sib xws (tawm ib qho zoo sib xws carrerties (cog tseg lub zog: 250 MPa, tensile lub zog: 400-550 mpa). Rau cov kav dej, st37 feem ntau piv rau ** ASTM A53 qib B ** (ERW \/ seamless) lossis ** Qib A283 Qib C **, Qib C **, Qib C **, nyob ntawm daim ntawv thov. NCO TSEG: Qhov sib txig sib luag yog nyob ntawm cov cai xws li tshuaj lom neeg sib xyaw ua ke thiab sim cov qauv.
