Basic Info.
Model NO.
IR-C
Usage
Boiler Pipe, Hydraulic/Automobile Pipe, Oil/Gas Drilling, Food/Beverage/Dairy Products, Machinery Industry, Chemical Industry, Mining, Construction & Decoration, Special Purpose
Section Shape
Round
Outer Diameter
8mm~315m
Thickness
0.8mm~30mm
Length
6meters, 9meters, 12meters, Random Length
Surface
Annealing Bright, Phosphating
Tolerance of Size
+/- 0.05mm
Delivery State
Bk, Bks, Nbk, Bkw, Gbk
Transport Package
Bundled, Wrapped, Wooden Cased.
Specification
ASME, DIN
Trademark
Iron&steel
Origin
China
HS Code
73041990
Production Capacity
100 Tons Per Month
Product Description
Qingdao Ironsteel International Trading Co., Ltd provide high quality, low priced Cold Rolled/Cold Drawn Seamless steel pipes. Our factory founded in 2002, 15 advanced production lines can make full range sizes of cold rolled seamless steel pipes(by carbon steel/alloy steel materials) . We haveour own testing labs, equipped with all necessary testing equipments for chemical analysis, water pressure testing, X-ray inspection, ultrasonic testing, eddy current inspection, tension testing, chemical testing, and so on.
High precision cold drawn seamless steel tube identifies the precision steel pipe with high dimension precision (inside diameter and outside diameter). Good surface finish, excellent roundness and straightness, and uniform wall occurrence. It can be very popular in mechanical structure and hydraulic gym equipment. This cold rolled or cold drawn seamless steel tube can greatly lessen machining time, raise the product excellence.
https://qdironsteel.en.made-in-china.com/product/svInuZCdSekx/China-DIN-ASTM-API-Standard-Tandem-Rolled-Hot-Rolled-Seamless-Carbon-Steel-Pipe-25mm-610mm.html
Precise Cold Rolled Seamless Steel Pipe by DIN, ANSI, JIS standard.
OD: 8mm ~315mm
Wall thickness: 0.8mm ~30mm
Tolerance: +/-0.1mm
Technique: Cold drawing/Cold rolling
Standard: ASME SA192/SA179, GB/T8162, GB/T8163, GB/T3639, DIN2391-2
Steel material: 20#(AISI 1020/DIN1.0402 C22), 45#(ASTM 1045,DIN45), 20Cr, 40Cr, ST52, ST45, ST37.4, Q345B, etc
Delivery state: BK, BKW, NBK, GBK, BKS
Usage: widely used for mechanical processing, Automobile industry, hydraulic equipments
Advantages of our high precision seamless steel pipe:
1. Smaller caliber
2. Accept small qty order
3. Good surface treatment
4. The pipe with superior performance, suitable for mechanical making
Introduction of delivery state
Different kinds of delivery condition, surface of pipe can be bright, galvanized, phosphating, etc. 
Preicision Seamless Tube Size List
Precise size controlling, make sure the tolerance no more than +/-0.1mm 
Size tolerance
Chemical Composition of seamless steel pipe
Mechanical Properties of seamless steel pipe
Our factory takes more than 5 suare kilometers, 15 production lines can make different sizes cold rolled or cold drawn seamless pipes. 
Professional exporting team grarantee the top quality of packing and shipment service.
FAQ
Q: What's your advantages
1. More nearly 20 years' experience of manufacturing and exporting work of COLD ROLLED SEAMLESS STEEL PIPES.
2. ISO/SGS/CE certified factory.
3. Special teams for sales, production, logistic and after sale services.
Q: Are you a manufacturer?
A: Yes, Our factory located in Shandong Province, China. The factory has 15 advanced production lines for the highest quality stainless steel pipe. You could definitely enjoy our direct factory price.
Q:Can we visit your factory ?
A: We welcome you come to China any time to visit our factory.
Q: Do you have quality control?
A: Yes, we have gained BV, SGS authentication, during production and before shipment, the third party inspection is also accepted.
Q: What pre-sales service you provide?
A: Prompt quotation, sample checking for free, 24 hours online communication, professional shipment freight calculation.
Q: How long is your delivery time?
A: Generally it is 7-14 days if the goods are in stock. or it is 25-45 days if the goods are not in stock, it is according to
quantity.
https://qdironsteel.en.made-in-china.com/product/NOKftubTXARj/China-ASTM-A53-Sch40-Galvanized-Seamless-Steel-Tube-Hot-DIP-Galvanized-Tubes.html
High precision cold drawn seamless steel tube identifies the precision steel pipe with high dimension precision (inside diameter and outside diameter). Good surface finish, excellent roundness and straightness, and uniform wall occurrence. It can be very popular in mechanical structure and hydraulic gym equipment. This cold rolled or cold drawn seamless steel tube can greatly lessen machining time, raise the product excellence.
https://qdironsteel.en.made-in-china.com/product/svInuZCdSekx/China-DIN-ASTM-API-Standard-Tandem-Rolled-Hot-Rolled-Seamless-Carbon-Steel-Pipe-25mm-610mm.html
Precise Cold Rolled Seamless Steel Pipe by DIN, ANSI, JIS standard.
OD: 8mm ~315mm
Wall thickness: 0.8mm ~30mm
Tolerance: +/-0.1mm
Technique: Cold drawing/Cold rolling
Standard: ASME SA192/SA179, GB/T8162, GB/T8163, GB/T3639, DIN2391-2
Steel material: 20#(AISI 1020/DIN1.0402 C22), 45#(ASTM 1045,DIN45), 20Cr, 40Cr, ST52, ST45, ST37.4, Q345B, etc
Delivery state: BK, BKW, NBK, GBK, BKS
Usage: widely used for mechanical processing, Automobile industry, hydraulic equipments
Advantages of our high precision seamless steel pipe:
1. Smaller caliber
2. Accept small qty order
3. Good surface treatment
4. The pipe with superior performance, suitable for mechanical making
Introduction of delivery state
| Designation | Symbol | Description |
| Cold finished (hard) | BK | Tubes do not undergo heat treatment following the final cold forming and,thus, have a rather high resistance to deformation |
| Cold finished (soft) | BKW | The final heat treatment is followed by cold drawing involving limited deformation.Appropriate further processing allows a certain degree of cold forming(e.g. bending expanding). |
| Cold finished and stress-relleved | BKS | Heat treatment is applled following the last cold forming process. Subject to appropriate processing conditions, the increase in the residual stresses involved enables both forming and machining to a certain degree |
| Annealed | GBK | The last cold forming process is followed by annealing in a controlled atmosphere |
| Normalized | NBK | The last cold forming process is followed by annealing above the upper transformation point in a controlled atmosphere |
| OD (mm) | Thickness (mm) | OD (mm) | Thickness (mm) | OD (mm) | Thickness (mm) | OD (mm) | Thickness (mm) |
| Φ13.1 | 1.5-3 | Φ35.5 | 1.5-7 | Φ46.1 | 1.5-10 | Φ93 | 1.5-15 |
| Φ19.25 | 1.5-5 | Φ35.9 | 1.5-7 | Φ47.8 | 1.5-10 | Φ19-Φ121 | 1.5-15 |
| Φ22 | 1.5-5 | Φ36.6 | 1.5-7 | Φ49.2 | 1.5-10 | Φ121-Φ200 | 8.0-25 |
| Φ22.2 | 1.5-5 | Φ38 | 1.5-8 | Φ49.5 | 1.5-10 | Φ200-Φ315 | 10-30 |
| Φ25 | 1.5-6 | Φ38.4 | 1.5-8 | Φ52.3 | 1.5-10 | ||
| Φ26.3 | 1.5-6 | Φ40 | 1.5-10 | Φ53.8 | 1.5-10 | ||
| Φ27 | 1.5-6 | Φ40.2 | 1.5-10 | Φ57 | 1.5-10 | ||
| Φ28 | 1.5-6 | Φ40.9 | 1.5-10 | Φ59 | 1.5-10 | ||
| Φ30 | 1.5-6 | Φ41.3 | 1.5-10 | Φ60 | 1.5-11 | ||
| Φ30.25 | 1.5-6 | Φ41.6 | 1.5-10 | Φ62.5 | 1.5-11 | ||
| Φ30.9 | 1.5-6 | Φ42 | 1.5-10 | Φ74 | 1.5-11 | ||
| Φ31 | 1.5-7 | Φ43 | 1.5-10 | Φ75 | 1.5-11 | ||
| Φ32 | 1.5-7 | Φ44.5 | 1.5-10 | Φ76 | 1.5-11 | ||
| Φ35 | 1.5-7 | Φ45.8 | 1.5-10 | Φ89 | 1.5-15 |
Size tolerance
| OD | Standard tolerance | Special tolerance | |||
| Outer Diameter | GB/T3639 | DIN2391 | EN10305 | O D | thickness |
| 4mm-20mm | ±0.10 mm | ±0.08 mm | ±0.08 mm | ±0.05mm | ±0.05mm |
| 20mm-30mm | ±0.10 mm | ±0.08 mm | ±0.08 mm | ±0.08 mm | ±0.08 mm |
| 31mm-40mm | ±0.15 mm | ±0.15 mm | ±0.15 mm | ±0.10 mm | ±0.08 mm |
| 41mm-60mm | ±0.20 mm | ±0.20 mm | ±0.20 mm | ±0.15 mm | ±0.15 mm |
| 61mm-80mm | ±0.30 mm | ±0.30 mm | ±0.30 mm | ±0.20 mm | ±0.20 mm |
| 81mm-120mm | ±0.45 mm | ±0.40 mm | ±0.40 mm | ±0.30 mm | ±0.30 mm |
| Material | Chemical composition (%) | ||||||
| C | Mn | P | S | Si | Ni | Cu | |
| 20# AISI 1020 | 0.17~0.23 | 0.35~0.65 | ≤0.035 | ≤0.035 | 0.17~0.37 | ≤0.3 | ≤0.25 |
| 45# ASTM1045, DIN45 | 0.42~0.5 | 0.5~0.8 | ≤0.04 | ≤0.045 | 0.17~0.37 | ≤0.25 | ≤0.25 |
| Steel material | Tensile Strength Mpa | Yield strength Mpa | Elongation % | Hardness | Straightness |
| 20# | ≥510 | ≥245 | ≥25 | ≤156HB | 0.3~1.0 |
| 45# | ≥647 | ≥355 | ≥16 | ≤HRC62 | 0.3~1.0 |
FAQ
Q: What's your advantages
1. More nearly 20 years' experience of manufacturing and exporting work of COLD ROLLED SEAMLESS STEEL PIPES.
2. ISO/SGS/CE certified factory.
3. Special teams for sales, production, logistic and after sale services.
Q: Are you a manufacturer?
A: Yes, Our factory located in Shandong Province, China. The factory has 15 advanced production lines for the highest quality stainless steel pipe. You could definitely enjoy our direct factory price.
Q:Can we visit your factory ?
A: We welcome you come to China any time to visit our factory.
Q: Do you have quality control?
A: Yes, we have gained BV, SGS authentication, during production and before shipment, the third party inspection is also accepted.
Q: What pre-sales service you provide?
A: Prompt quotation, sample checking for free, 24 hours online communication, professional shipment freight calculation.
Q: How long is your delivery time?
A: Generally it is 7-14 days if the goods are in stock. or it is 25-45 days if the goods are not in stock, it is according to
quantity.
https://qdironsteel.en.made-in-china.com/product/NOKftubTXARj/China-ASTM-A53-Sch40-Galvanized-Seamless-Steel-Tube-Hot-DIP-Galvanized-Tubes.html