ASTM A335 Chrome Moly Seamless Yeeb Nkab

ASTM A335 Chrome Moly Pipes piav qhia

ASTM A335 Cov Lus Qhia Tshwj Xeeb​, tus qauv Asmeskas, tshwj xeeb yog tsim los rau siab -kev pabcuam kub thiab npog cov khoom tseem ceeb xws liP1, P2, P5, P9, P11, P12, P22, thiab P91. Cov yeeb nkab steel hlau no feem ntau siv hauvkev tsim hluav taws xob, petrochemical, thiab roj refining kev lag luam​ rau kev xa tawm siab -kub, siab - cov xov xwm siab xws li chav thiab hydrocarbons. Cov ntawv thov raug suav nroglub ntsiab chav piping hauv fais fab nroj tsuag boilersthiabsuperheaters nyob rau hauv roj av cracking furnaces‌.

 

ASTM A335 Alloy Steel Seamless Yeeb Nkab specification

Sab nraud txoj kab uas hla (OD):20mm txog 1000mm

Phab ntsa thickness (WT):2mm txog 100mm

Ntev:6m, 12m, kev cai ntev lossis tus qauv ntev

Cov khoom siv xaiv: P5, P9, P11, P22, P91

 

A335 Cov khoom sib xyaw & MechanicalProperties

Qib	Tshuaj muaj pes tsawg leeg (%)
	C	Si	Mn	Cr	Mo	P	S	Al	Cu	V
P5	0.05-0.15	0.50-0.80	0.30-0.60	4.50-6.00	0.90-1.20	Tsawg dua lossis sib npaug li 0.025	Tsawg dua lossis sib npaug li 0.025	Tsawg dua lossis sib npaug li 0.030	Tsawg dua lossis sib npaug li 0.25	Tsawg dua lossis sib npaug li 0.10
P9	0.05-0.15	0.50-0.80	0.30-0.60	4.00-6.00	0.90-1.20	Tsawg dua lossis sib npaug li 0.025	Tsawg dua lossis sib npaug li 0.025	Tsawg dua lossis sib npaug li 0.030	Tsawg dua lossis sib npaug li 0.25	Tsawg dua lossis sib npaug li 0.10
P22	0.05-0.15	0.50-0.80	0.30-0.60	2.25-2.75	0.90-1.10	Tsawg dua lossis sib npaug li 0.025	Tsawg dua lossis sib npaug li 0.025	Tsawg dua lossis sib npaug li 0.020	Tsawg dua lossis sib npaug li 0.25
P91	0.05-0.15	0.20-0.50	0.30-0.60	8.00-9.50	0.85-1.05	Tsawg dua lossis sib npaug li 0.020	Tsawg dua lossis sib npaug li 0.010	Tsawg dua lossis sib npaug li 0.050	Tsawg dua lossis sib npaug li 0.25	0.18 – 0.25

 

Qib	Mechanical zog
	Tensile zog	Yield zog	Elongation	Hardness	Impact toughness
P5	485-620 MPa	Ntau dua lossis sib npaug li 205 MPa	Ntau dua lossis sib npaug li 20% (ntawm 50 mm ntev)	HB: Tsawg dua lossis sib npaug rau 250 HRC: Tsawg dua lossis sib npaug rau 25	Ua tau raws li qhov yuav tsum tau ua ntawm Charpy impact test, feem ntau yog qhov yuav tsum tau muaj yam tsawg kawg nkaus ntawm -20 degree.
P9	485-620 MPa	Ntau dua lossis sib npaug li 205 MPa
P22	415-585 MPa	Ntau dua lossis sib npaug li 205 MPa
P91	585-725 MPa	Ntau dua lossis sib npaug li 415 MPa

 

Kev soj ntsuam zoo

‌Chemical Composition Analysis​: Tshawb xyuas cov ntsiab lus ntawm cov ntsiab lus tseem ceeb xws li chromium (Cr), molybdenum (Mo), carbon (C), manganese (Mn), silicon (Si), thiab lwm yam.

‌Mechanical Property Testing: suav nrog tensile lub zog, tawm lub zog, elongation, txo qhov chaw, thiab cuam tshuam toughness.

‌Kev kuaj Hardness: Xws li Brinell hardness (HBW) thiab Rockwell hardness (HRC).

‌Dimensional Tolerance Inspection: Ntsuas geometric qhov ntev nrog rau sab nraud, phab ntsa thickness, thiab ntev.

‌Surface Quality Inspection: Txheeb xyuas qhov tsis xws luag xws li tawg, quav, thiab suav nrog.

‌Tsis yog -Kev Ntsuas Kev Puas Tsuaj (NDT)‌:

Kev kuaj ultrasonic (UT)

Sib Nqus Particle Test (MT)

Liquid Penetrant Testing (PT)

‌Kev ntsuam xyuas Macrostructural: Tshawb xyuas qhov tsis xws luag nrog rau qhov porosity, cais, thiab tawg.

‌Microstructural Examination: Ntsuam xyuas microstructure, grain loj, thiab tsis yog -hlau inclusions.

‌High -Kev ntsuas kub ua haujlwm‌:

Ua kom siab - ntsuas kub tensile

Kev ntsuam xyuas rupture (rau siab -kev siv kub)

 

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