API 5Lbututu karfe bututu
Karfe daraja: L360 ko X52 (PSL1)
Abubuwan buƙatun sinadaran:
C: ≤0.28 (mara kyau) ≤0.26 (welded)
Mn: ≤1.40
P: ≤0.030
S: ≤0.030
Ku: 0.50 ko ƙasa da haka
Ni: ≤0.50
C: ≤0.50
Mo: ≤0.15
*V+Nb+Ti: ≤0.15
* Ana iya ƙara abun ciki na manganese da 0.05% akan kowane raguwar 0.01% na abun cikin carbon, har zuwa matsakaicin 1.65%
Abubuwan buƙatun kayan aikin injiniya:
Ƙarfin haɓaka: ≥360Mpa
Ƙarfin ƙarfi: ≥460Mpa
Weld tensile ƙarfi na welded karfe bututu: ≥460Mpa
Tsawaitawa: ≥1940* AXC0.2/4600.9 , inda AXC shine yanki na giciye na samfurin tensile
Haƙuri na waje diamita na karfe bututu:
| Diamita na waje D mm | Ƙarshen diamita na waje mm | |
| Bututun ƙarfe mara nauyi | Weld karfe bututu | |
| < 60.3 | -0.8, +0.4 | |
| 60.3 D ko ƙasa da 168.3 ko ƙasa da haka | -0.4, +1.6 | |
| 168.3 <D≤610 | ± 0.005D, amma matsakaicin ± 1.6 | |
| 610 <D≤1422 | +/- 2.0 | + /- 1.6 |
| > 1422 | Bisa yarjejeniya | |
bango kauri haƙuri of karfe bututu:
| Kaurin bango t mm | Hakuri mm |
| Bututun ƙarfe mara nauyi | |
| 4.0 ko fiye | +0.6, -0.5 |
| 4 <t <25 | +0.150t, -0.125t |
| 25 ko sama da haka | +3.7 ko +0.1t, duk wanda ya fi girma -3.0 ko -0.1t, ɗauka mafi girma |
| Welded tube | |
| 5.0 ko fiye | + / - 0.5 | |
| 5.0 | <t <15 | Ƙari ko ragi 0.1 t |
| 15 | ko fiye | +/- 1.5 |
Karfe daraja: L360N or X52N(PSL2)
Chemical abun da ke ciki bukatun:
C: ≤0.24
ku: ≤0.45
Mn: ≤1.40
P: ≤0.025
S: ≤0.015
V: ≤0.10
Nb:≤0.05
Shafin: ≤0.04
Ku: ≤0.50
Ni: ≤0.30
C: ≤0.30
Mo: ≤0.15
V+Nb+Ti: ≤0.15
* Ana iya ƙara abun ciki na manganese da 0.05% ga kowane 0.01% raguwa a cikin abun ciki na carbon, har zuwa matsakaicin 1.65%.
* Ba a yarda da ƙara boron da gangan ba, ragowar B≤0.001%
Carbon daidai:
CEP cm: ≤0.25
CEIW: ≤0.43
Yi amfani da CE lokacin da abun cikin carbon ya fi 0.12%, kuma amfani da CE IIW lokacin da P cm abun cikin carbon ɗin bai kai ko daidai da 0.12%.
CEP cm = C+Si/30+Mn/20+Cu/20+Ni/60+Cr/20+Mo/15+V/10+5B
Idan sakamakon binciken narkewar B ya kasance ƙasa da 0.0005%, to babu buƙatar haɗawa da bincike na kashi B a cikin samfuran samfuran, kuma ana iya ɗaukar abun ciki na B azaman sifili a cikin lissafin carbon daidai CEP cm.
CEIIW =C+Mn/6 (C+Mo+V)/5+(Ni+Cu)/ 15
Makanikai kaddarorin bukatun:
Ƙarfin ƙima: 360-530Mpa
Ƙarfin ƙarfi: 460-760Mpa
Rarraba rabo: ≤0.93 (kawai zartar da D> 323.9mm karfe bututu)
Weld tensile ƙarfi na welded karfe bututu: ≥460Mpa
Ƙananan elongation: = 1940 * AXC0.2 / 4600.9, inda AXC shine yanki na giciye na samfurin tensile.
CVN tasiri gwajin tube
Gwajin zafin jiki 0.C
| Ƙayyade diamita na waje na D mm | Cikakken girman CVNKarbar kuzariKVJ |
| 508 ko fiye | 27 |
| 508 zuwa 762 | 27 |
| 762 zuwa 914 | 40 |
| > 914 zuwa 1219 | 40 |
| 1219 zuwa 1422 | 40 |
| 1422 zuwa 2134 | 40 |
Na waje diamita haƙuri of karfe bututu:
| Diamita na waje D mm | Ƙarshen karkacewar diamita na waje | |
| Bututun ƙarfe mara nauyi | Weld karfe bututu | |
| < 60.3 | -0.4, +0.8 | |
| 60.3 D ko ƙasa da 168.3 ko ƙasa da haka | -0.4, +1.6 | |
| 168.3 <D=610 | ± 0.005D, amma matsakaicin ± 1.6 | |
| 610 <D=1422 | +/- 2.0 | + /- 1.6 |
| > 1422 | Bisa yarjejeniya | |
bango kauri haƙuri of karfe bututu:
| Kaurin bango t mm | Haƙuri |
| Bututun ƙarfe mara nauyi | |
| 4.0 ko fiye | +0.6, -0.5 |
| 4 <t <25 | +0.150t, -0.125t |
| 25 ko sama da haka | +3.7 ko +0.1t, duk wanda ya fi girma -3.0 ko -0.1t, ɗauka mafi girma |
| Bututu mai walda | |
| 5.0 ko fiye | + / - 0.5 |
| 5.0 <t <15 | Ƙari ko ragi 0.1 t |
| 15 ko fiye | +/- 1.5 |
Lokacin aikawa: Satumba-26-2023
