a Cu ≤ 0.50 %; Ni ≤ 0.50 %; Cr ≤ 0.50 % uye Mo ≤ 0.15 %.

b Pakuderedzwa kwega kwega kwe0.01% pazasi peiyo yakataurwa yakanyanya kusungirirwa kwekabhoni, kuwedzera kwe0.05% pamusoro peiyo yakatarwa yekuisa iyo Mn inobvumidzwa, kusvika painodarika 1.65% yemagiredhi ≥ L245 kana B, asi ≤ L360 kana X52; kusvika pachiyero che1.75 % pamagiredhi> L360 kana X52, asi <L485 kana X70; uye inosvika pa2.00% yeGrade L485 kana X70.

c Kunze kwekunge kwakabvumiranwa neimwe nzira, Nb + V ≤ 0.06 %.

d Nb + V + Ti ≤ 0.15 %.

e Kunze kwekunge kwakabvumirana neimwe nzira.

f Kunze kwekunge zvabvumiranwa neimwe nzira, Nb + V + Ti ≤ 0.15 %.

g Hapana kuwedzera nemaune kweB kunobvumirwa uye zvakasara B ≤ 0.001 %.

Pipe Grade

kupi

C ndeye 1940 yekuverenga uchishandisa SI units uye 625,000 pakuverenga uchishandisa USC mayunitsi;

Axc ndiyo inoshandiswa tensile test piece cross-sectional area, inoratidzwa mu square millimeters (square inches), sezvinotevera:

1) nokuda kwedenderedzwa muchinjikwa-chikamu bvunzo zvidimbu, 130 mm2 (0.20 in.2) nokuti 12.7 mm (0.500 mukati) uye 8.9 mm (0.350 mu.) dhayamita bvunzo zvidimbu; 65 mm2 (0.10 in.2) ye 6.4 mm (0.250 mukati) dhayamita bvunzo zvidimbu;

2) yezvimedu zvebvunzo zvizere-chikamu, chidiki che a) 485 mm2 (0.75 in.2) uye b) nzvimbo yakachinjika yechikamu chebvunzo, inotorwa uchishandisa yakataurwa kunze kwedhayamita uye yakatsanangurwa madziro ukobvu hwepombi, yakatenderedzwa kusvika padyo 10 mm2 (0.01 in.2);

3) yezvimedu zvekuyedza mitsetse, iyo diki ye) 485 mm2 (0.75 in.2) uye b) nzvimbo yakachinjika yechikamu chekuyedza, inotorwa uchishandisa hupamhi hwakatarwa hwechidimbu chekuyedza uye kukora kwemadziro kwakatsanangurwa pombi. , yakatenderedzwa kusvika pedyo 10 mm2 (0.01 in.2);

U ndiyo yakataurwa shoma yekusimba simba, inoratidzwa mu megapascals (mapaundi per square inch).