Company Details
  • 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:Welded Stainless Steel Tubes,Welded Stainless Steel Tubes for Mechanical Structures,GB/T12770 Welded Stainless Steel Tubes
Torich International Co.,Ltd--The Steel Tube Maker Welded Stainless Steel Tubes,Welded Stainless Steel Tubes for Mechanical Structures,GB/T12770 Welded Stainless Steel Tubes
Home > Products > Stainless Steel Pipe > GB/T12770 12Cr18Ni9 019Cr19Mo2NbTi Welded Stainless Steel Tubes for Mechanical Structures

GB/T12770 12Cr18Ni9 019Cr19Mo2NbTi Welded Stainless Steel Tubes for Mechanical Structures

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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: 30 Days

Basic Info

Model No.: GB/T12770

Type: Welded

Certification: API, CE, BSI, UL

Application: Structure Pipe

Section Shape: Round

Surface Treatment: Polished

Usage: Construction & Decoration

Technique: Cold Drawn, Cold Rolled Cold Drawn

Material: Stainless Steel, Stainless Steel 201/304/316

Name: GB/T12770 Material 12Cr18Ni9 019Cr19Mo2NbTi Welded Stainless Steel Tubes For Mechanical Structures

Grade: S30210 S30408 S30403 S31008

Surface: Pickling,polished

Finish: Heat Treatment

OD: 3-500mm

WT: 0.5-50mm

Additional Info

Packaging: in seaworthy packing

Productivity: 50000tons/year

Brand: Torich

Transportation: Ocean,Land,Air

Place of Origin: Zhejiang, China (Mainland)

Supply Ability: 60000 Ton per year

Certificate: ISO9001:2008 ISO14001:2008, TS16949, CE PED, TUV, API

HS Code: 7306110000

Port: Ningbo,Shanghai,Zhoushan

Product Description

Product Name: GB/T12770 Material 12Cr18Ni9 019Cr19Mo2NbTi Welded Stainless Steel Tubes for Mechanical Structures

Size range: O.D.:3-500mm W.T.:0.5-50mm L:2000-12000mm according to customers' actual application and production.

Application : For Mechanical Structures purposes

Steel Grade: 12Cr18Ni9,06Cr19Ni10,022Cr19Ni10,06Cr25Ni20,022Cr22Ni5Mo3N,019Cr19Mo2NbTi,06Cr13Al

Characteristic:

Good concentricity

Good surface quality

Good OD and ID tolerance

High Precision

Stable quality

Smooth Roughness

TORICH QUALITY ASSURANCE

Table1Tolerance of OD

Classification Nominal OD Permissible Tolerance
PC PB PA

H

T

<25 ±0.20 ±0.15 ±0.10
≥25~<40 ±0.30 ±0.25 ±0.20
≥40~<63 ±0.50 ±0.30 ±0.25
≥63~<90 ±0.60 ±0.50 ±0.40
≥90~<159 ±0.80 ±0.65 ±0.50
≥159~<300 ±0.8%D ±0.7%D ±0.5%D
≥300~<610 ±0.1%D ±0.8%D ±0.6%D
≥10 protocol protocol protocol

WC

SP

<25 ±0.15 ±0.12 ±0.10
≥25~<40 ±0.20 ±0.15 ±0.13
≥40~<50 ±0.20 ±0.18 ±0.15
≥50~<60 ±0.25 ±0.20 ±0.18
≥60~<90 ±0.30 ±0.28 ±0.25
≥90~<100 ±0.40 ±0.35 ±0.30
≥100~<200 ±0.5%D ±0.4%D protocol
≥200 protocol protocol protocol

Table 2Tolerance of WT

Nominal WT Permissible Tolerance
<0.5 ±0..10
≥0.5~1.0 ±0.15
>1.0~2.0 ±0.20
>2.0~<4.0 ±0.30
≥4.0 ±10%S

Table 3 Bending Degree

Nominal Wall Thickness/mm Bending Degree/(mm/m)
≤108 ≤1.0
>108~325 ≤1.5
>325 ≤2.5

Table4 The density of the steel and Calculation of Theoretic Weight

No. Steel Grade Density/(kg/dm3) The formula after conversion
1 12Cr18Ni9 7.93 W=0.02491S(D-S)
2 06Cr19Ni10
3 022Cr19Ni10 7.90 W=0.02482S(D-S)
4 06Cr25Ni20 7.98 W=0.02507S(D-S)
5 06Cr17Ni12Mo2 8.00 W=0.02513S(D-S)
6 022Cr17Ni12Mo2
7 06Cr18Ni11Ti 8.03 W=0.02523S(D-S)
8 06Cr18Ni11Nb
9 022Cr22Ni5Mo3N 7.80 W=0.02450S(D-S)
10 022Cr23Ni5Mo3N
11 022Cr25Ni7Mo4N
12 022Cr18Ti 7.70 W=0.02491S(D-S)
13 019Cr19Mo2NbTi 7.75 W=0.02435S(D-S)
14 06Cr13Al
15 022Cr11Ti
16 022Cr12Ni
17 06Cr13

Table 5 Steel Grade and Chemical Componenet

No. Type Unified digital code Grade Chemical Componenet(Quality Fraction)/%
C Si Mn P S Ni Cr Mo N Others
1 Austenite S30210 12Cr18Ni9 ≤0.15 ≤0.75 ≤2.00 ≤0.040 ≤0.030 8~10 17~19 - ≤0.10 -
2 S30408 06Cr19Ni10 ≤0.08 ≤0.75 ≤2.00 ≤0.040 ≤0.030 8~11 18~20 - - -
3 S30403 022Cr19Ni10 ≤0.030 ≤0.75 ≤2.00 ≤0.040 ≤0.030 8~12 18~20 - - -
4 S31008 06Cr25Ni20 ≤0.08 ≤1.50 ≤2.00 ≤0.040 ≤0.030 19~22 24~26 - - -
5 S31608 06Cr17Ni12Mo2 ≤0.08 ≤0.75 ≤2.00 ≤0.040 ≤0.030 10~14 16~18 2~3 - -
6 S31603 022Cr17Ni12Mo2 ≤0.08 ≤0.75 ≤2.00 ≤0.040 ≤0.030 10~14 16~18 2~3 - -
7 S32168 06Cr18Ni11Ti ≤0.08 ≤0.75 ≤2.00 ≤0.040 ≤0.030 9~12 17~19 - - Ti15C~0.70
8 S34778 06Cr18Ni11Nb ≤0.08 ≤0.75 ≤2.00 ≤0.040 ≤0.030 9~12 17~19 - - Nb110C~1010
9 Bipolar S22253 022Cr22Ni5Mo3N ≤0.030 ≤1.00 ≤2.00 ≤0.030 ≤0.020 4.5~6.5 21~23 2.5~3.5 0.08~0.20
10 S22053 022Cr23Ni5Mo3N ≤0.030 ≤1.00 ≤2.00 ≤0.030 ≤0.020 4.5~6.5 22~23 3~3.5 0.14~0.20
11 S25073 022Cr25Ni7Mo4N ≤0.030 ≤0.80 ≤1.20 ≤0.035 ≤0.020 6~8 24~26 3~5 0.24~0.32 Cu≤0.50
12 Ferrite S11863 022Cr18Ti ≤0.03 ≤0.75 ≤1 ≤0.04 ≤0.03 (0.60) 16~19 - - Ti or Nb:0.1~1
13 S11972 019Cr19Mo2NbTi ≤0.025 ≤0.75 ≤1 ≤0.04 ≤0.03 1.00 17.5~19.50 1.75~2.50 ≤0.035 (Ti+Nb):[0.2+4(C+N)]~0.8
14 S11348 06Cr13Al ≤0.08 ≤0.75 ≤1 ≤0.04 ≤0.03 (0.60) 11.50~14.50 - - Al:0.1~0.3
15 S11163 022Cr11Ti ≤0.03 ≤0.75 ≤1 ≤0.04 ≤0.02 (0.60) 10.50~11.70 - ≤0.030 Ti≥8(C+N),Ti:0.15~0.50,Nb≤0.10
16 S11213 022Cr12Ni ≤0.03 ≤0.75 ≤1.5 ≤0.04 ≤0.015 0.3~1.00 10.50~12.50 - ≤0.030
17 Martensitic S41008 06Cr13 ≤0.08 ≤0.75 ≤1 ≤0.04 ≤0.03 (0.60) 11.50~13.50 - - -
Note:The number in brackets is the maximum allowed to be added. Chemical component of some grade is different from GB/T20878.

Table 6 Recommendatory heat treating regime of the steel tubes

No. Type Steel grade Recommendatory heat treating regime
1 Austenite 12Cr18Ni9 1010℃~1150℃,water-cooling or other methods of rapid cooling
2 06Cr19Ni10 1010℃~1150℃,water-cooling or other methods of rapid cooling
3 022Cr19Ni10 1010℃~1150℃,water-cooling or other methods of rapid cooling
4 06Cr25Ni20 1030℃~1180℃,water-cooling or other methods of rapid cooling
5 06Cr17Ni12Mo2 1010℃~1150℃,water-cooling or other methods of rapid cooling
6 022Cr17Ni12Mo2 1010℃~1150℃,water-cooling or other methods of rapid cooling
7 06Cr18Ni11Ti 920℃~1150℃,water-cooling or other methods of rapid cooling
8 06Cr18Ni11Nb 980℃~1150℃,water-cooling or other methods of rapid cooling
9 Dual-phase steel 022Cr22Ni5Mo3N 1020℃~1100℃,water-cooling
10 022Cr23Ni5Mo3N 1020℃~1100℃,water-cooling
11 022Cr25Ni7Mo4N 1025℃~1125℃,water-cooling
12 Ferritic 022Cr18Ti 780℃~950℃,rapid cooling or slow cooling
13 019Cr19Mo2NbTi 800℃~1050℃,rapid cooling
14 06Cr13Al 780℃~830℃,rapid cooling or slow cooling
15 022Cr11Ti 800℃~900℃,rapid cooling or slow cooling
16 022Cr12Ni 700℃~820℃,rapid cooling or slow cooling
17 Martensite 06Cr13 750℃,rapid cooling ;800℃~900℃,slow cooling



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  • GB/T12770 12Cr18Ni9 019Cr19Mo2NbTi Welded Stainless Steel Tubes for Mechanical Structures
  • GB/T12770 12Cr18Ni9 019Cr19Mo2NbTi Welded Stainless Steel Tubes for Mechanical Structures
  • GB/T12770 12Cr18Ni9 019Cr19Mo2NbTi Welded Stainless Steel Tubes for Mechanical Structures
  • GB/T12770 12Cr18Ni9 019Cr19Mo2NbTi Welded Stainless Steel Tubes for Mechanical Structures
  • GB/T12770 12Cr18Ni9 019Cr19Mo2NbTi Welded Stainless Steel Tubes for Mechanical Structures
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