API 5Lpipeline steel yeeb nkab
Qib steel: L360 lossis X52 (PSL1)
Chemical composition yuav tsum:
C: ≤0.28 (seamless) ≤0.26 (welded)
Mn: ≤1.40
P: ≤0.030
S: ≤0.030
Cu: 0.50 lossis tsawg dua
Tsis muaj: ≤0.50
Cr: ≤0.50
Mo: ≤0.15
*V+Nb+Ti: ≤0.15
* Manganese cov ntsiab lus tuaj yeem nce ntxiv los ntawm 0.05% rau txhua txhua 0.01% txo cov ntsiab lus carbon, mus txog qhov siab tshaj ntawm 1.65%
Mechanical Properties xav tau:
Yield zog: ≥360Mpa
Tensile zog: ≥460Mpa
Weld tensile lub zog ntawm welded steel yeeb nkab: ≥460Mpa
Elongation: ≥1940 * AXC0.2 / 4600.9, qhov twg AXC yog qhov chaw hla ntawm cov qauv tensile
Sab nraud txoj kab uas hla ntawm cov yeeb nkab steel:
| Sab nraud txoj kab uas hla D mm | Xaus sab nraud kab sib txawv mm | |
| Seamless steel yeeb nkab | Welded steel yeeb nkab | |
| <60.3 | -0.8 + 0.4 | |
| 60.3 D lossis tsawg dua 168.3 lossis tsawg dua | -0.4, +1.6 | |
| 168.3 <D≤610 | ± 0.005D, tab sis siab tshaj ± 1.6 | |
| 610 <D≤1422 | +/- 2.0 | +/- 1.6 |
| > 1422 | Los ntawm kev pom zoo | |
Phab ntsa tuab kam rau ua of hlau cev:
| Phab ntsa thickness t mm | Qhov siab mm |
| Seamless steel yeeb nkab | |
| 4.0 los yog tsawg dua | + 0.6, -0.5 |
| 4 <t < 25 | +0.150t, -0.125t |
| 25 los yog siab dua | +3.7 lossis +0.1t, qhov twg loj dua -3.0 lossis -0.1t, yuav loj dua |
| Welded raj | |
| 5.0 los yog tsawg dua | +/- 0.5 | |
| 5.0 | <t < 15 | Ntxiv los yog rho tawm 0.1 t |
| 15 | los yog ntau dua | +/- 1.5 |
Hlau qib: l360 uaN or X52n ua(PSL2)
Tshuaj muaj pes tsawg leeg cov cai:
C: ≤0.24
Si: ≤0.45
Mn: ≤1.40
P: ≤0.025
S: ≤0.015
V: ≤0.10
Nb:≤ 0.05
Tis: ≤0.04
Kub: ≤0.50
Tsis muaj: ≤0.30
Cr: ≤0.30
Mo: ≤0.15
V+Nb+Ti: ≤0.15
* Manganese cov ntsiab lus tuaj yeem nce ntxiv los ntawm 0.05% rau txhua txhua 0.01% txo cov ntsiab lus carbon, mus txog qhov siab tshaj ntawm 1.65%.
* Tsis txhob cia siab ntxiv ntawm boron, seem B≤0.001%
Cov pa roj carbon sib npaug:
CEP cm : 0.25 hli
PEB : ≤0.43
* Siv CE thaum cov ntsiab lus carbon ntau dua 0.12%, thiab siv CE IIW thaum P cm cov ntsiab lus carbon tsawg dua lossis sib npaug li 0.12%.
CEP cm = C+Si/30+Mn/20+Cu/20+Ni/60+Cr/20+Mo/15+V/10+5B
Yog hais tias qhov tshwm sim ntawm smelting tsom xam ntawm B yog tsawg dua 0.0005%, ces tsis tas yuav tsum muaj xws li kev tsom xam ntawm lub ntsiab B nyob rau hauv cov khoom tsom xam, thiab cov ntsiab lus B yuav raug kho raws li xoom nyob rau hauv cov carbon sib npaug CEP cm xam.
CEIIW = C+Mn/6 (C+Mo+V)/5+(Ni+Cu)/ 15
Neeg kho tshuab khoom cov cai:
Tawm zog: 360-530Mpa
Tensile zog: 460-760Mpa
Yield ratio: ≤0.93 (tsuas yog siv tau rau D> 323.9mm steel yeeb nkab)
Weld tensile lub zog ntawm welded steel yeeb nkab: ≥460Mpa
Yam tsawg kawg nkaus elongation: = 1940 * AXC0.2/4600.9 , qhov twg AXC yog qhov chaw hla ntawm cov qauv tensile.
CVN cuam tshuam kuaj lub raj
Kev ntsuas kub 0.C
| Qhia ib lub cheeb sab nraud ntawm D mm | Tag nrho qhov loj CVNAbsorbed zogKVJ |
| 508 o o ua | 27 |
| > 508 rau 762 | 27 |
| > 762 rau 914 | 40 |
| > 914-1219 ib | 40 |
| > 1219 txog 1422 | 40 |
| > 1422 rau 2134 | 40 |
Sab nrauv txoj kab uas hla kam rau ua of hlau cev:
| Sab nraud txoj kab uas hla D mm | Xaus sab nraud qhov sib txawv | |
| Seamless steel yeeb nkab | Welded steel yeeb nkab | |
| <60.3 | -0.4 + 0.8 | |
| 60.3 D lossis tsawg dua 168.3 lossis tsawg dua | -0.4, +1.6 | |
| 168.3 = 610 | ± 0.005D, tab sis siab tshaj ± 1.6 | |
| 610 AWV = 1422 | +/- 2.0 | +/- 1.6 |
| > 1422 | Los ntawm kev pom zoo | |
Phab ntsa tuab kam rau ua of hlau cev:
| Phab ntsa thickness t mm | Kev kam rau siab |
| Seamless steel yeeb nkab | |
| 4.0 los yog tsawg dua | + 0.6, -0.5 |
| 4 <t < 25 | +0.150t, -0.125t |
| 25 los yog siab dua | +3.7 lossis +0.1t, qhov twg loj dua -3.0 lossis -0.1t, coj loj dua |
| Welded yeeb nkab | |
| 5.0 los yog tsawg dua | +/- 0.5 |
| 5.0 <t < 15 | Ntxiv los yog rho tawm 0.1 t |
| 15 los yog ntau tshaj | +/- 1.5 |
Post lub sij hawm: Sep-26-2023
