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  • Torich International Co.,Ltd--The Steel Tube Maker

  •  [Zhejiang,China]
  • Business Type:Distributor/Wholesaler , Manufacturer , Service , Trade Company
  • Main Mark: Africa , Americas , Asia , Caribbean , East Europe , Europe , Middle East , North Europe , Oceania , Other Markets , West Europe , Worldwide
  • Exporter:31% - 40%
  • Certs:GB, ISO9001, ISO14001
  • Description:Steel Tubes,Seamless Steel Tubes,Multi - Rifled Seamless Steel Tubes
Torich International Co.,Ltd--The Steel Tube Maker Steel Tubes,Seamless Steel Tubes,Multi - Rifled Seamless Steel Tubes
Home > Products > Seamless Steel Tubes > Multi - Rifled Seamless Steel Tubes for High Pressure Boiler GB/T 20409

Multi - Rifled Seamless Steel Tubes for High Pressure Boiler GB/T 20409

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    Payment Type: L/C,T/T,D/P,Paypal,Money Gram,Western Union
    Incoterm: FOB,CFR,CIF,FCA,CPT
    Min. Order: 5 Ton
    Delivery Time: 45 Days

Basic Info

Model No.: GB/T 20409

Type: Welded

Certification: API, CE, BSI, UL

Application: Fluid Pipe, Boiler Pipe

Section Shape: Round

Surface Treatment: Oiled

Usage: Pipeline Transport

Technique: Cold Drawn

Material: Stainless Steel, Carbon Steel

OD: 4-1200mm

WT: 0.3-200mm

Length: 4-12M

Additional Info

Packaging: Anti Rust Oil Protection, in seaworthy packing material, in hexagonal bundles or in wooden box

Productivity: 40000 ton per year

Brand: TORICH

Transportation: Ocean,Land,Air

Place of Origin: Zhejiang,China

Supply Ability: 50000 ton per year

Certificate: ISO 9001:2008 ISO 14001:2008 TS 16949

HS Code: 7304191000

Port: Shanghai,Ningbo,Foshan

Product Description

GB/T 20409 Multi-Rifled Seamless Steel Tubes for High-Pressure Boiler

Spec:
Material:20G , 20MnG , 25MnG , 12CrMoG , 15CrMoG
Size Range:OD:4-1200mm
WT:0.3-200mm
General Length:8-12m
Tolerance:
According to the following tables or customers` request.


Longitudinal mechanical properties of internal screw tubes at room temperature

Number Grade

tensile strength

/

MPa(N/)

Lower yield strength
/MPa((N/)

Elongation

A/%

Impact energy

/J

Not less than
1 20G 410~550 245 24 35
2 20MnG ≥415 240 22 35
3 25MnG ≥485 275 20 35
4 12CrMoG 410~560 205 21 35
5 15CrMoG 440~640 235 21 35

The grade and chemical composition of steel

Number Brand chemical composition(mass fraction)/ %
C Mn Si Cr Mo S P
1 20G 0.17~0.23 0.35~0.65 0.17~0.37 -- -- ≤0.020 ≤0.025
2 20MnG 0.17~0.23 0.70~1.00 0.17~0.37 -- -- ≤0.020 ≤0.025
3 25MnG 0.22~0.29 0.7~1.00 0.17~0.37 -- -- ≤0.020 ≤0.025
4 12CrMoG 0.08~0.15 0.40~0.70 0.17~0.37 0.40~0.70 0.40~0.55 ≤0.020 ≤0.025
5 15CrMoG 0.12~0.18 0.40~0.70 0.17~0.37 0.80~1.10 0.40~0.55 ≤0.020 ≤0.025

Note1:Residual element content of 20G,20MnG,25MnG should satisfy: Cu≤0.20%,Cr≤0.25%,Ni≤0.25%,V≤0.08%,Mo≤0.15%;The remaining elements of other brands should satisfy: Cu≤0.20%,Ni≤0.30%.

Note2:The acid soluble aluminum in 20G steel should not be more than 0.010%.

Note3:The nitrogen content of the steel produced by the oxygen converter plus the refining of the furnace should not be more than 0.008%.


Characteristic:

TORICH QUALITY ASSURANCE

Good surface quality

Good OD and ID tolerance controlled to Technical Standard
Stable quality
100% Eddy Current Test


Processing:Cold drawning


Technical Delivery Conditions:Heat treatment


Widely used in the field of:High-pressure boiler


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  • Multi - Rifled Seamless Steel Tubes for High Pressure Boiler GB/T 20409
  • Multi - Rifled Seamless Steel Tubes for High Pressure Boiler GB/T 20409
  • Multi - Rifled Seamless Steel Tubes for High Pressure Boiler GB/T 20409
  • Multi - Rifled Seamless Steel Tubes for High Pressure Boiler GB/T 20409
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