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

Basic Information
Place of Origin: China
Brand Name: TORICH
Certification: ISO 9001 ISO 14001 TS 16949
Model Number: GB/T 20409
Minimum Order Quantity: 5 Ton
Price: negotiable
Packaging Details: Packing in wooden box,hexagonal bundles or other seaworthy ways.
Delivery Time: 45 days
Payment Terms: L/C, D/A, D/P, T/T, Western Union, MoneyGram
Supply Ability: 40000 Ton/Year
Detail Information
Product Name: GB/T 20409 Multi-Rifled Seamless Steel Tubes For High-Pressure Boiler Material: 20G , 20MnG , 25MnG , 12CrMoG , 15CrMoG
Surface: Oiled Application: High-pressure Boiler
Shape: Round OD: 4-1200mm
WT: 0.3-200mm Length: 8-12m
High Light:

seamless steel pipe

,

seamless carbon steel tube


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

Multi - Rifled Seamless Steel Tubes for High Pressure Boiler GB/T 20409 0/

MPa(N/Multi - Rifled Seamless Steel Tubes for High Pressure Boiler GB/T 20409 1)

Lower yield strength
Multi - Rifled Seamless Steel Tubes for High Pressure Boiler GB/T 20409 2/MPa((N/Multi - Rifled Seamless Steel Tubes for High Pressure Boiler GB/T 20409 1)

Elongation

A/%

Impact energy

Multi - Rifled Seamless Steel Tubes for High Pressure Boiler GB/T 20409 4/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

Contact Details
Mendy Zhang

Phone Number : +8618067578633

WhatsApp : +8613736164628