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    Chemical Composition Requirements for EN10253-2 fittings

    Different from EN10253-1, EN10253-2 pipe fittings can be made from a wide range of carbon steel and alloy steel materials. The starting material shall be rigorously selected to suit for different applications at room temperatures, low temperatures, or elevated temperatures. The steel grades designated by EN10253-2 can be further divided as carbon steel, Cr-Mo alloy steel, nickel alloy steel, and line-pipe level alloy steel. Their chemical-composition requirements are listed as below.
    EN10253-2 90° Elbow 3D 323.9x7.1 P265GH Type B 

    1. Chemical requirements for carbon steel EN10253-2 pipe fittings.

    GRADE
    P235TR2 
    1.0255
    P265TR2 
    1.0259
    P235GH 
    1.0345
    P265GH 
    1.0425
    P355N 
    1.0562
    P355NH 
    1.0565
    P355NL1 
    1.0566
    P215NL 
    1.0451
    P265NL 
    1.0453
    ELEMENT
    C
    0.16 
    0.20 
    0.16 
    0.20 
    0.20 
    0.20 
    0.18 
    0.15 
    0.20 
    Si
    0.35 
    0.40 
    0.35 
    0.40 
    0.50 
    0.50 
    0.50 
    0.35 
    0.40 
    Mn
    1.20 
    1.40 
    1.20 
    1.40 
    0.90~1.70
    0.90~1.70
    0.90~1.70
    0.40~1.20
    0.60~1.40
    P
    0.025 
    0.025 
    0.025 
    0.025 
    0.025 
    0.025 
    0.025 
    0.025 
    0.025 
    S
    0.020 
    0.020 
    0.020 
    0.020 
    0.020 
    0.020 
    0.020 
    0.020 
    0.020 
    Al
    ≥ 0.020
    ≥ 0.020
    ≥ 0.020
    ≥ 0.020
    ≥ 0.020
    ≥ 0.020
    ≥ 0.020
    ≥ 0.020
    ≥ 0.020
    Cr
    0.30 
    0.30 
    0.30 
    0.30 
    0.30 
    0.30 
    0.30 
    0.30 
    0.30 
    Cu
    0.30 
    0.30 
    0.30 
    0.30 
    0.30 
    0.30 
    0.30 
    0.30 
    0.30 
    Mo
    0.08 
    0.08 
    0.08 
    0.08 
    0.08 
    0.08 
    0.08 
    0.08 
    0.08 
    Nb
    0.01 
    0.01 
    0.01 
    0.01 
    0.05 
    0.05 
    0.05 
    0.10 
    0.10 
    Ni
    0.30 
    0.30 
    0.30 
    0.30 
    0.50 
    0.50 
    0.50 
    0.30 
    0.30 
    Ti
    0.04 
    0.04 
    0.04 
    0.04 
    0.04 
    0.04 
    0.04 
    0.04 
    0.04 
    V
    0.02 
    0.02 
    0.02 
    0.02 
    0.10 
    0.10 
    0.10 
    0.02 
    0.02 
    Others
    *A
    *A
    *A
    *A
    *B
    *B
    *B
    -
    -
      *All values are maximum unless otherwise specified.

      *All values are in % by mass for cast analysis. 
      *A denotes that the content of Cr+Cu+Mo+Ni by mass is no larger than 0.70%.
      *B denotes that the content of Nb+Ti+V by mass is no larger than 0.12% while N ≤ 0.02%.
      *The carbon steels are mainly used for pressure purpose at room temperatures.

    2. Chemical requirements for Cr-Mo alloy steel EN10253-2 pipe fittings.

    GRADE
    16Mo3 
    1.5415
    10CrMo5-5 
    1.7338
    13CrMo4-5 
    1.7335
    10CrMo9-10 
    1.7380
    X11CrMo5 
    1.7362
    X11CrMo9-1 
    1.7386
    X10CrMoVNb9-1 
    1.4903
    ELEMENT
    C
    0.12~0.20
    0.15 
    0.10~0.17
    0.08-0.14
    0.08-0.15
    0.08-0.15
    0.08~0.12
    Si
    0.35 
    0.50~1.00
    0.35 
    0.50 
    0.15~0.50
    0.25~1.00
    0.20~0.50
    Mn
    0.40~0.90
    0.30~0.60
    0.40~0.70
    0.30~0.70
    0.30~0.60
    0.30~0.60
    0.30~0.60
    P
    0.025 
    0.025 
    0.025 
    0.025 
    0.025 
    0.025 
    0.020 
    S
    0.020 
    0.020 
    0.020 
    0.020 
    0.020 
    0.020 
    0.010 
    Al
    ≤ 0.040
    ≤ 0.040
    ≤ 0.040
    ≤ 0.040
    ≤ 0.040
    ≤ 0.040
    ≤ 0.040
    Cr
    0.30 
    1.00~1.50
    0.70~1.15
    2.00~2.50
    4.00~6.00
    8.00~10.00
    8.00~9.50
    Cu
    0.30 
    0.30 
    0.30 
    0.30 
    0.30 
    0.30 
    0.30 
    Mo
    0.25~0.35
    0.45~0.65
    0.40~0.60
    0.90~1.10
    0.45~0.65
    0.90~1.10
    0.85~1.05
    Nb
    -
    -
    -
    -
    -
    -
    0.06~0.10
    Ni
    0.30 
    0.30 
    0.30 
    0.30 
    -
    -
    0.40 
    Ti
    -
    -
    -
    -
    -
    -
    -
    V
    -
    -
    -
    -
    -
    -
    0.18~0.25
    Others
    -
    -
    -
    -
    -
    -
    N : 0.030-0.070
       *All values are maximum unless otherwise specified.
      *All values are in % by mass for cast analysis.
      *The Cr-Mo alloy steels are mainly used for pressure purpose at elevated temperature.

    3. Chemical requirements for nickel alloy steel EN10253-2 pipe fittings.

    GRADE
    12Ni14 
    1.5637
    X10Ni9 
    1.5682
    ELEMENT
    C
    0.15 
    0.13 
    Si
    0.15~0.35
    0.15~0.35
    Mn
    0.30~0.80
    0.30~0.80
    P
    0.025 
    0.020 
    S
    0.010 
    0.010 
    Al
    -
    -
    Cr
    -
    -
    Cu
    0.30 
    0.30 
    Mo
    -
    0.10 
    Nb
    -
    -
    Ni
    3.25~3.75
    8.50~9.50
    Ti
    -
    -
    V
    0.05 
    0.05 
    Others
    -
    -
      *All values are maximum unless otherwise specified.
      *All values are in % by mass for cast analysis.
      *The nickel alloy steels are mainly used for pressure purpose at low temperatures.

    4. Chemical requirements for line-pipe high yield EN10253-2 pipe fittings.

    GRADE
    L290NB 
    1.0484
    L360NB 
    1.0582
    L360QB 
    1.8948
    L415NB 
    1.8972
    L415QB 
    1.8947
    L450QB 
    1.8952
    ELEMENT
    C
    0.17 
    0.20 
    0.16 
    0.21 
    0.16 
    0.16 
    Si
    0.40 
    0.45 
    0.45 
    0.45 
    0.45 
    0.45 
    Mn
    1.20 
    1.60 
    1.40 
    1.60 
    1.60 
    1.60 
    P
    0.025 
    0.025 
    0.025 
    0.025 
    0.025 
    0.025 
    S
    0.020 
    0.020 
    0.020 
    0.020 
    0.020 
    0.020 
    Al
    0.015~0.060
    0.015~0.060
    0.015~0.060
    0.015~0.060
    0.015~0.060
    0.015~0.060
    Cr
    0.30 
    0.30 
    0.30 
    0.30 
    0.30 
    0.30 
    Cu
    0.25 
    0.25 
    0.25 
    0.25 
    0.25 
    0.25 
    Mo
    0.10 
    0.10 
    0.10 
    0.10 
    0.10 
    0.10 
    Nb
    0.05 
    0.05 
    0.05 
    0.05 
    0.05 
    0.05 
    Ni
    0.30 
    0.30 
    0.30 
    0.30 
    0.30 
    0.30 
    Ti
    0.04 
    0.04 
    0.04 
    0.04 
    0.04 
    0.06 
    V
    0.05 
    0.15 
    0.05 
    0.15 
    0.08 
    0.09 
    Others
    *C
    *D
    *C
    *E
    *F
    *D
      *All values are maximum unless otherwise specified.
      *All values are in % by mass for cast analysis.
      *Used for the connention with API 5L line pipes. The correlations are: 
       L290NB - X42N, L360NB - X52N, L360QB - X52Q, L415NB - X60N,
       L415QB - X60Q, L450QB - X65Q.
      *C: N ≤ 0,012, CEV ≤ 0,42;  D: N ≤ 0,012, V+Nb+Ti ≤ 0,15, CEV ≤ 0,45;
       E: N ≤ 0,012, V+Nb+Ti ≤ 0,15;  F: N ≤ 0,012, V+Nb+Ti ≤ 0,15, CEV ≤ 0,43.

    Views: 3773  Author:METALS INDUSTRIAL  Date:2015/12/13