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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 Tube,Welded Steel Tube,Stainless Steel Welded Steel Tube
Torich International Co.,Ltd--The Steel Tube Maker Steel Tube,Welded Steel Tube,Stainless Steel Welded Steel Tube
Home > Products > Welded Steel Pipe > GB/T 12770 Stainless Steel Welded Steel Tube for Mechanical Structure

GB/T 12770 Stainless Steel Welded Steel Tube for Mechanical Structure

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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: 1 Ton
    Delivery Time: 45 Days

Basic Info

Model No.: GB/T 12770

Type: Seamless, Welded

Certification: API, CE, BSI, UL

Application: Hydraulic Pipe, Structure Pipe

Section Shape: Round

Surface Treatment: Oiled, Polished

Usage: Special Purpose, Machinery Industry, Construction & Decoration

Technique: Cold Drawn, ERW

Material: Alloy Steel, Stainless Steel

OD: 80-1200mm

WT: 4-100mm

Length: 2-12m

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

Welded Stainless Steel Tubes for Mechanical Structure GB/T 12770


SPEC:

Material:304/304L 316/316L 321 302 310S

Size Range:OD:4-1200mm

WT:0.3-200mm

General Length:2-12m


Tolerance:

According to the following tables or customers` request.

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 A.1 Comparison table of stainless steel brands in each standard

Number GB/T 20878-2007

ASTM A

959-09

JIS G 4303-2005

JIS G 4311-1991

ISO/TS 15510: 2003

ISO 4955: 2005

EN10088: 1-2005

ROCT

5632-1972

Number Unified digital code New Brand Old Brand
1 13 S30210 12Cr18Ni9 1Cr18Ni9 S30200,302 SUS302 X10CrNi18-8 X10CrNi18-8,1.4310 12X18H9
2 17 S30408 06Cr19Ni10 0Cr18Ni9 S30400,304 SUS304 X5CrNi18-10 X5CrNi18-10,1.4301 --
3 18 S30403 022Cr19Ni10 00Cr19Ni10 S30403,304L SUS304L X2CrNi19-11 X2CrNi19-11,1.4306 03X18H11
4 35 S31008 06Cr25Ni20 0Cr25Ni20 S31008,310S SUS310S X12CrNi23-12 X12CrNi23-12,1.4845 10X23H18
5 38 S31608 06Cr17Ni12Mo2 0Cr17Ni12Mo2 S31600,316 SUS316 X5CrNiMo17-12-2 X5CrNiMo17-12-2,1.4401 --
6 39 S31603 022Cr17Ni12Mo2 00Cr17Ni14Mo2 S31603,316L SUS316L X2CrNiMo17-12-2 X2CrNiMo17-12-2,1.4404 03X17H14M2
7 55 S32168 06Cr18Ni11Ti 0Cr18Ni10Ti S32100,321 SUS321 X6CrNiTi18-10 X6CrNiTi18-10,1.4541 08X18H10T
8 62 S34778 06Cr18Ni11Nb 0Cr18Ni11Nb S34700,347 SUS347 X6CrNiNb18-10 X6CrNiNb18-10,1.4550 08X18H12B
9 70 S22253 022Cr22Ni5Mo3N 00Cr22Ni5Mo3N S31803 SUS329J3L X2CrNiMoN22-5-3 X2CrNiMoN22-5-3,1.4462 --
10 71 S22053 022Cr23Ni5Mo3N 00Cr22Ni5Mo3N S32205,2205 -- -- -- --
11 76 S25073 022Cr25Ni7Mo4N 00Cr25Ni7Mo4N S32750,2507 -- X2CrNiMoN25-7-4 X2CrNiMoN25-7-4,1.4410 --
12 87 S11863 022Cr18Ti 00Cr17 S43035,439
X3CrTi17 X3CrTi17,1.4510 08X17T
13 92 S11972 019Cr19Mo2NbTi 00Cr18Mo2 S44400,444
X2CrMoTi18-2 X2CrMoTi18-2,1.4521 --
14 78 S11348 06Cr13Al 00Cr13Al S40500,405 SUS405 X6CrAl13 X6CrAl13,1.4002 --
15 80 S11163 022Cr11Ti 00Cr12Ti S40900
X2CrTi12 X2CrTi12,1.4512 --
16 82 S11213 022Cr12Ni 00Cr12Ni S40977 -- X2CrNi12 X2CrNi12,1.4003 --
17 97 S41008 06Cr13 0Cr13 S41008,410S
X6Cr13 X6Cr13,1.4000 08X13





Characteristic:

Good concentricity

Good surface quality

Good OD and ID tolerance

High Precision

Stable quality

Smooth Roughness

TORICH QUALITY ASSURANCE


Processing:Single-sided automatic arc welding or Double-sided automatic arc welding


Technical Delivery Conditions:Heat treatment+pickling or NBK


Widely used in the field of:Construction & Decoration


Product Images:



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  • GB/T 12770 Stainless Steel Welded Steel Tube for Mechanical Structure
  • GB/T 12770 Stainless Steel Welded Steel Tube for Mechanical Structure
  • GB/T 12770 Stainless Steel Welded Steel Tube for Mechanical Structure
  • GB/T 12770 Stainless Steel Welded Steel Tube for Mechanical Structure
  • GB/T 12770 Stainless Steel Welded Steel Tube for Mechanical Structure
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