Raws li API SPEC 5L tus qauv, cov tshuaj muaj pes tsawg leeg tus qauv ntawm API 5L Gr X52 yeeb nkab yog raws li nram no:
Cov ntsiab lus tseem ceeb
Cov pa roj carbon (C): Cov ntsiab lus tsis tshaj 0.20%. Carbon yog ib qho tseem ceeb ntxiv dag zog rau cov hlau, uas tuaj yeem txhim kho lub zog ntawm cov hlau, tab sis cov ntsiab lus siab dhau lawm yuav txo qhov toughness thiab weldability ntawm steel.
Silicon (Si): Cov ntsiab lus tsis tshaj 0.45%. Silicon tuaj yeem ua kom lub zog thiab hardness ntawm cov hlau. Tib lub sijhawm, nws tuaj yeem siv los ua deoxidizer hauv cov txheej txheem steelmaking kom txo cov pa oxygen hauv cov hlau thiab txhim kho cov hlau zoo.
Manganese (Mn): Cov ntsiab lus tsis pub tshaj 1.60%. Manganese tuaj yeem txhim kho lub zog, toughness thiab hnav tsis kam ntawm cov hlau, thaum txo cov kev phom sij ntawm leej faj ntawm cov hlau thiab txhim kho cov haujlwm kub ntawm cov hlau.
Cov khoom tsis zoo
Phosphorus (P): Cov ntsiab lus tsis tshaj 0.020%. Phosphorus yog ib qho teeb meem hauv cov hlau, uas tuaj yeem ua rau txias brittleness ntawm cov hlau thiab txo cov toughness thiab weldability ntawm hlau.
Sulfur (S): Cov ntsiab lus tsis tshaj 0.010%. Sulfur tuaj yeem ua rau kub brittleness nyob rau hauv steel, txo qhov kub ua hauj lwm kev ua tau zoo thiab weldability ntawm hlau, thiab kuj txo cov toughness thiab corrosion kuj ntawm hlau.
Lwm yam ntsiab lus
Vanadium (V): Cov ntsiab lus tsis tshaj 0.10%. Vanadium tuaj yeem kho cov nplej ntawm cov hlau, txhim kho lub zog, toughness thiab hnav tsis kam ntawm cov hlau, thiab txo qhov kub siab ntawm cov hlau.
Niobium (Nb): Cov ntsiab lus tsis tshaj 0.05%. Niobium tuaj yeem txhim kho lub zog thiab tawv ntawm cov hlau, thiab tseem txhim kho qhov qaug zog thiab corrosion tsis kam ntawm hlau.
Titanium (Ti): Cov ntsiab lus tsis tshaj 0.04%. Titanium tuaj yeem kho cov nplej ntawm cov hlau, txhim kho lub zog thiab tawv ntawm cov hlau, thiab tseem txhim kho cov weldability thiab corrosion kuj ntawm hlau.
API 5L Gr X52 Pipe Kab Chemical Composition Standard
| X52 PSL 1 | X52 PSL 2 | |||||||
|---|---|---|---|---|---|---|---|---|
|
Qib |
C (Max.) |
Mn (Max.) |
P (Max.) |
S (Max.) |
C (Max.) |
Mn (Max.) |
P (Max.) |
S (Max.) |
|
X52 |
0.26 |
1.40 |
0.03 |
0.03 |
0.22 |
1.40 |
0.025 |
0.015 |
