
Seamless and Welded Steel Tubes for Automobile, mechanical and General Engineering Purposes
Part 8: Specific requirements for longitudinally welded stainless steel tubes
Method of Manufacture:
The tubes are manufactured from flat rolled strip, longitudinally welded across the abutting edges without the addition of filler metal.
Delivery condition:
a) As-welded and sized: KM
b) Welded and sized (fully softened): GKW(S)
c) Welded and sized (fully softened) (including de-scaling): GZF(S)
d) Cold finished(fully softened): GBK
e) Cold finished(fully softened) (including de-scaling): GZF(S)
Steel Grade and Chemical Compositions:
Note: Special steel grade is also available, according to customer
request
Mechanical properties | ||||||||||
Designation | BS 1449-2: | KM (as welded) | GKM(S),GZF(S)(welded and sized fully softened) | GBK (S),and GZF(S)(cold finished ,fully softened) | ||||||
Re min. | Rm min. | A min. | Re min. | Rm min. | A min. | Re min. | Rm min. | A min. | ||
N/mm2 | N/mm2 | % | N/mm2 | N/mm2 | % | N/mm2 | N/mm2 | % | ||
LW 12b | 300 | 400 | 10 | _ | _ | _ | _ | _ | _ | |
LW 19b | 409S19 | 300 | 400 | 10 | 200 | 350 | 20 | _ | _ | _ |
LW 20 | 304S11 | 420 | 520 | 25 | 185 | 480 | 30 | _ | _ | _ |
LWCF 20 | 185 | 480 | 30 | |||||||
LW 21 | 304S15 | 450 | 560 | 25 | 210 | 510 | 30 | _ | _ | _ |
LWCF 21 | 210 | 510 | 30 | |||||||
LW 22 | 316S13 | 420 | 520 | 25 | 185 | 480 | 30 | _ | _ | _ |
LWCF 22 | 185 | 480 | 30 | |||||||
LW 23 | 316S33 | 450 | 560 | 25 | 210 | 510 | 30 | _ | _ | _ |
LWCF 23 | 210 | 510 | 30 | |||||||
LW 24 | 321S31 | 450 | 560 | 25 | 210 | 510 | 30 | _ | _ | _ |
LWCF 24 | 210 | 510 | 30 |
Tolerance on specified cut lengths | |||
Specified cut length | Tolerance | ||
over | up to and including | ||
mm | mm | mm | |
500 | + | 2 | |
- | 0 | ||
500 | 2000 | + | 3 |
- | 0 | ||
2000 | 5000 | + | 5 |
- | 0 | ||
5000 | 7000 | + | 10 |
- | 0 | ||
7000 | __ | by agreement | |
NOTE Closer tolerances may be obtained by agreement between the purchaser and manufacturer. |
BS6323 Specifications for
Seamless and welded steel tubes for automobile, mechanical and general engineering purposes
BS6323-1 Part 1: General requirements
BS6323-2 Part 2: Specific requirements for hot finished welded steel tubes
BS6323-3 Part 3: Specific requirements for hot finished seamless steel tubes
BS6323-4 Part 4: Specific requirements for cold finished seamless steel tubes
BS6323-5 Part 5: Specific requirements for electric resistance welded including induction welded steel
tubes
BS6323-6 Part 6: Specific requirements for cold finished electric resistance welded including induction
welded steel tubes
BS6323-7 Part 7: Specific requirements for submerged arc welded steel tubes
BS6323-8 Part 8: Specific requirements for longitudinally welded stainless steel tubes
TORICH INTERNATIONAL LIMITED
Who We are ?
-------A professional steel pipes materials inventor, manufacturer
and solution provider
Torich International Limited is a professional manufacturer
and exporter of steel pipes materials. It is an international
marketing and sales company specialized in steel tubes, which holds
the factories of Seamless Steel Tubes with Carbon and Alloy Steel
Grade, Welded Precision Steel Tubes,DOM Steel Tubes, Seamless &
Welded Stainless Steel Tubes with Nickel and Alloy Steel Grade.
Our factory was established since 1997, with the name of Haiyan
Sanxin Steel Pipe Co., Ltd. The factories’ technicians are of great
engineering experience in steel pipe industry for more than 20
years, which are in great command of production technology for Cold
Drawing and Cold Rolling. So we have strong technician team and
manufacturing capability.
What products we do?
------- Invent and produce various Precision Steel Pipes
Our steel pipes cover the following ranges:
Seamless Precision Steel Pipes
Bearing Steel Tubes
Welded Precision Steel Pipes, with DOM production
Seamless Heat Exchanger Steel Pipe
Seamless Boiler Steel Pipes
Honed Tubes
Hydraulic Cylinder Steel Tubes
Hydraulic Telescopic Cylinder Tubes
Seamless Structural Steel Pipes
Seamless Mechanical Steel Pipes
Seamless Alloy Steel Tubes & Pipes
Seamless Stainless Steel tubes
Welded Stainless Steel Tubes
Seamless Stainless Steel Tubes & Pipes
Welded Stainless Steel Tubes & Pipes
Seamless Carbon Steel Tubes & Pipes
Nickel Alloy Steel Tubes & Pipes
What TORICH do:
1. Producing Steel Tubes
2. Selling both on Domestic and International Market
3. Precisely Targeting Customers’ Requirement- Sourcing the right
factory for right products for Customers
Products Application:
Oil Cylinders
Air Cylinder,
Automotive Cylinder Liners
Boilers, Pressure Vessels
Shell & Heat Exchangers
Jack Lifting
Telescopic Systems
Pneumatic Cylinders
Agricultural Machineries
Size range is:
O.D. 4-350mm,
W.T. 0.5-30mm,
Length: according to customer’s requirement and agreement
Steel Grade:
Carbon Steel Grade:
ST35.8, ST37.0, ST44, ST52;
E155, E195, E215, E235, E275, E355;
195GH, P235GH, P265GH, P195TR1, P195TR2, P235TR1, P235TR2, P265TR1,
P265TR2;
SAE1010, SAE1020, SAE1026, SAE1035, SAE1045;
Carbon steel tube: SA178, A179, A192, A210, SA213, SA214, etc.
Alloy Steel Grade:
T2, T5, T9, T11, T12, T17, T21, T22, T91,T92, 15Mo3,16Mo3,
13CrMo44;
SAE4130, SAE4140, 40Cr, 40Cr4, 10CrMo910, 12CrMo910, 11CrMo910,
25CrMo4, 35CrMo, 35CrMo4, 42CrMo4, 34CrMo4, 20MnV, 20MnV6,20CrMn;
Carbon steel tube: A179,A192,A210,DIN17175,etc.
Bearing Steel Grades:
GCr15 52100 suj2 suj3 100Cr6 SKF3S SKF3S 20CrNiMo 8620H 4118H;
Nickel Alloy Grade:
N02200/2201, N04400, N06600, N06601, N06625, N06852, N06219,
N06690, N08800/8810/8811, N08825, N08028, N08535, N08904, N08925,
N08926, N010276, N06022, etc.
Austenitic/Super Austenitic Stainless Steel Grade:
304/304L, 316/316L, 314, 321, 347H, 316Ti, 316LMod, 317L/N, 310S,
253MA, 330, 904L, S31254, XM-19, etc.
Ferrite/Martensite Stainless Steel Grade:
TP410, TP405, TP420, TP430, TP430Ti, TP403, TP409, TP444, TP439,
TP446, etc.
Duplex/Super Duplex Stainless Steel Grade:
S31803, S32304, S31500, S32550, S32750, S32760, etc.
Corporate Culture:
We focus on Quality First, Quality Traceability, and Quality
Stability!
We focus on Customer First, People First, and Quality-Oriented!
Success:
First factory started in 1997, in the name of Torich , now covers
50000 square meters of factory building, with more than
100employees, and over 45 million RBM assets.
In 2008, we started the company of Torich International
Limited for international business and marketing.
Welcome partners from all over the world for long term cooperation!