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Grade and Chemical Composition (%)   for ASTM A519 Seamless carbon and Alloy Steel Mechanical pipe

Grade     C     Mn     P≤     S≤     Si     Cr     Mo

1008     ≤0.10    0.30-0.50    0.040    0.050    -    -    -

1010     0.08-0.13    0.30-0.60    0.040    0.050    -    -    -

1018     0.15-0.20    0.60-0.90    0.040    0.050    -    -    -

1020     0.18-0.23    0.30-0.60    0.040    0.050    -    -    -

1025     0.22-0.28    0.30-0.60    0.040    0.050    -    -    -

1026     0.22-0.28    0.60-0.90    0.040    0.050    -    -    -

aisi 4130     0.28-0.33    0.40-0.60    0.040    0.040    0.15-0.35    0.80-1.10    0.15-0.25

aisi 4140     0.38-0.43    0.75-1.00    0.040    0.040    0.15-0.35    0.80-1.10    0.15-0.35

Mechanical Properties for ASTM A519 Seamless carbon and Alloy Steel Mechanical pipe

Grade condition tensile pointe Yidld point Elongation

1020     CW       ≥414          ≥483         ≥5%

         SR       ≥345             ≥448       ≥10%

         A         ≥193           ≥331         ≥30%

         N         ≥234            ≥379         ≥22%

1025     CW       ≥448          ≥517         ≥5%

         SR         ≥379         ≥483         ≥8%

         A        ≥207           ≥365        ≥25%

         N         ≥248           ≥379        ≥22%

aisi 4130     SR         ≥586         ≥724         ≥10%

         A         ≥379         ≥517           ≥30%

         N         ≥414           ≥621         ≥20%

aisi 4140     SR         ≥689          ≥855         ≥10%

         A         ≥414           ≥552         ≥25%

       N         ≥621             ≥855        ≥20%