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            Home - Products -石油裂化用無縫鋼管

            石油裂化用無縫鋼管

            石油裂化用無縫鋼管

            標準:
            GB9948——中國國家標準

            用途:
            用于石油、精煉廠的爐管、熱交換器管和管道用無縫鋼管。

            主要生產鋼管牌號:
            10、20、15CrMo、1Cr2Mo、1Cr5Mo等

            尺寸公差:

            鋼管種類

            外徑(D)

            鋼管壁厚(S)

            冷拔管

            鋼管外徑(mm)

            允許偏差(mm)

            鋼管壁厚 (mm)

            允許偏差(mm)

            >30~50

            ±0.3

            ≤30

            ±10%

            >50~219

            ±0.8%

            熱軋管

            >219

            ±1.0%

            >20

            ±10%

            力學性能:

            標準

            牌號

            抗拉強度(MPa)

            屈服強度(MPa)

            伸長率(%)

            沖擊功(J)

            布氏硬度(HB)

            交貨狀態

            GB9948

            10

            330~490

            ≥205

            ≥24

            /

            /

            正火

            20

            410~550

            ≥245

            ≥21

            ≥39

            /

            正火

            15CrMo

            440~640

            ≥235

            ≥21

            ≥47

            ≤170

            正火加回火

            1Cr2Mo

            ≥390

            ≥175

            ≥22

            ≥92

            ≤179

            正火加回火

            1Cr5Mo

            ≥390

            ≥195

            ≥22

            ≥92

            ≤187

            退火

            化學成分:

            標準

            牌號

            化學成分(%)

            C

            Si

            Mn

            P

            S

            Cr

            Mo

            Ni

            GB9948

            10

            0.07~0.14

            0.17~0.37

            0.35~0.65

            ≤0.035

            ≤0.035

            ≤0.15

            /

            ≤0.25

            20

            0.17~0.24

            0.17~0.37

            0.35~0.65

            ≤0.035

            ≤0.035

            ≤0.25

            /

            ≤0.25

            15CrMo

            0.12~0.18

            0.17~0.37

            0.40~0.70

            ≤0.035

            ≤0.035

            0.80~1.10

            0.40~0.55

            ≤0.30

            1Cr2Mo

            ≤0.15

            0.50~1.00

            0.30~0.60

            ≤0.035

            ≤0.030

            2.15~2.85

            0.45~0.65

            /

            1Cr5Mo

            ≤0.15

            ≤0.50

            ≤0.60

            ≤0.035

            ≤0.030

            4.00~6.00

            0.45~0.60

            ≤0.60

            關鍵詞:

             

             
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