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            Home - Products -高壓化肥設備用無縫鋼管

            高壓化肥設備用無縫鋼管

            高壓化肥設備用無縫鋼管

            標準:
            GB6479——中國國家標準

            用途:
            用于高壓化肥設備和管道用無縫鋼管。
            主要生產鋼管牌號:
            10、20、16Mn、10MoWVNb、15CrMo、1Cr5Mo、12 Cr2Mo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)

            低溫沖擊Akv

            GB6479

            10

            335~490

            ≥205

            ≥24

            /

            -20℃≥18

            20

            410~550

            ≥245

            ≥24

            ≥39

            -20℃≥18

            16Mn

            490~670

            ≥320

            ≥21

            ≥47

            -40℃≥21

            10MoWVNb

            470~670

            ≥295

            ≥19

            ≥62

             

            15CrMo

            440~640

            ≥235

            ≥21

            ≥47

             

            1Cr5Mo

            390~590

            ≥195

            ≥22

            ≥94

             

            12 Cr2Mo

            450~600

            ≥280

            ≥20

            ≥38

             

            化學成分:

            標準

            牌號

            化學成分(%)

            C

            Si

            Mn

            P

            S

            Cr

            Mo

            Ni

            GB

            6479

            10

            0.07~0.14

            0.17~0.37

            0.35~0.65

            ≤0.030

            ≤0.030

            /

            /

            /

            20

            0.17~0.24

            0.17~0.37

            0.35~0.65

            ≤0.030

            ≤0.030

            /

            /

            /

            16Mn

            0.12~0.20

            0.20~0.60

            1.20~1.60

            ≤0.030

            ≤0.030

             
             
             

            10MoWVNb

            0.07~0.13

            0.50~0.80

            0.50~0.80

            ≤0.030

            ≤0.030

            /

            0.60~0.90

            /

            15CrMo

            0.12~0.18

            0.17~0.37

            0.40~0.70

            ≤0.030

            ≤0.030

            0.80~1.10

            0.40~0.55

            /

            1Cr5Mo

            ≤0.15

            ≤0.50

            ≤0.60

            ≤0.030

            ≤0.030

            4.00~6.00

            0.45~0.60

            ≤0.60

            12 Cr2Mo

            0.80~0.15

            ≤0.50

            0.40~0.70

            ≤0.030

            ≤0.030

            2.0~2.50

            0.90~1.20

             

            注:其中10的殘余元素含量Ni≤0.25%、Cr≤0.15%、Cu≤0.20%
            20的殘余元素含量Ni≤0.25%、Cr≤0.25%、Cu≤0.20%、Mo≤0.15%、V≤0.08%
            其他的殘余元素含量Ni≤0.30%、Cr≤0.30%、Cu≤0.20%

             
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