Seamless steel tubes for low-temperature service

Sunny Steel offer an extensive range of Seamless steel pipes for low temperature sevice. Low temperature service seamless pipes are application for low-temperature pressure container piping by the main standard GB/T18984-2003, ASTM/ASME A/SA333 with steel grade 16MnDG, 10MnDG, A333 Gr.1, A333 Gr.6, A333Gr.3.

GB/T18984-2003 standard suitable for -49 to -148 degrees F cryogenic pressure vessel piping, and low-temperature heat exchanger tubes seamless steel pipe.

ASTM/ASME A/SA-333 Grades allow for cold temperature service to minus 150 degrees F. Material is always provided in the normalized condition at a minimum and Charpy Impact tested to a specific temperature range to assure compliance with the required service temperature.

Chemical Composition(%)

Grade C Si Mn P(max) S Ni Mo V
16MnDG 0.12-0.20 0.20-0.55 1.20-1.60 0.025 0.025  –  –  –
10MnDG <=0.13 0.17-0.37 <=1.35 0.025 0.025  –  – <=0.07
A333 Gr.1 <=0.30  – 0.40-1.06 0.025 0.025  –  –  –
A333 Gr.3 <=0.19 0.18-0.37 0.31-0.64 0.025 0.025 3.18-3.82  – <=0.12
A333 Gr.6 <=0.30 >=0.10 0.29-1.06 0.025 0.025  –  –  –

Mechanical Properties

Grade Tensile strength Lower yield strength(Rcl/Mpa) Elongation
Rm/Mpa W.T.<=16mm W.T.>16mm A/%
16MnDG 490-665 >=325 >=315 >=30
10MnDG >=400 >=240 >=35
A333 Gr.1 >=205 >=380 >=35
A333 Gr.3 >=450 >=240 >=30
A333 Gr.6 >=455 >=250 >=30

Sizes

1/4” Nominal to 24”O.D.
Wall Thickness – Schedule 10 through XXH

Low Temperature Steel Pipe Specifications & Grades

  • SA333 & A333 – Grades 1, 3, & 6
  • GB/T18984-2003 – 16MnDG, 10MnDG
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