Factory Supply GB 3087 20mog JIS G3462 ASTM A209m Steel Round Bar Q235 Q345 Ss400 Carbon Mild Steel Round Bar
Our primary objective is usually to offer our shoppers a serious and responsible small business relationship, offering personalized attention to all of them for Factory Supply GB 3087 20mog JIS G3462 ASTM A209m Steel Round Bar Q235 Q345 Ss400 Carbon Mild Steel Round Bar, How about to start your superior enterprise with our corporation? We’ve been ready, qualified and fulfilled with pride. Let’s start our new business enterprise with new wave.
Our primary objective is usually to offer our shoppers a serious and responsible small business relationship, offering personalized attention to all of them for China Carbon Bar and Carbon Rod, We aim to become the modern enterprise with the commercial ideal of “Sincerity and confidence” and with the aim of “Offering customers the most sincere services and best quality products”. We sincerely ask for your unchanged support and appreciate your kind advice and guidance.
Overview
Application
It is mainly used to make high-quality carbon structural steel, low pressure medium pressure boiler pipe, super heated steam seamless carbon steel pipe
Main Grade
Grade of high-quality carbon structural steel: 10#,20#
Chemical Component
| Standard | Grade | Chemical Composition(%) | |||||||
| C | Si | Mn | P | S | Cr | Cu | Ni | ||
| GB3087 | 10 | 0.07～0.13 | 0.17～0.37 | 0.38～0.65 | ≤0.030 | ≤0.030 | 0.3～0.65 | ≤0.25 | ≤0.30 |
| 20 | 0.17～0.23 | 0.17～0.37 | 0.38～0.65 | ≤0.030 | ≤0.030 | 0.3～0.65 | ≤0.25 | ≤0.30 | |
Mechanical Property
| Standard | Steel pipe | Wall thickness | Tensile strength | Yield Strength | Elongation |
| GB3087 | (mm) | (MPa) | (MPa) | % | |
| ≥ | |||||
| 10 | / | 335～475 | 195 | 24 | |
| 20 | ＜15 | 410～550 | 245 | 20 | |
| ≥15 | 225 | ||||
Tolerance
Permissible deviation of outer diameter of steel tubes
| Type of steel tube | Permissible deviation | ||||||
| Hot rolled (extruded, expanded) steel tube | ± 1.0% D or ± 0.50, take the greater number | ||||||
| Cold drawn (rolled) steel tube | ± 1.0% D or ± 0.30, take the greater number | ||||||
Permissible deviation of the wall thickness of hot rolled (extrusion, expansion) steel tubes
Unit: mm
| Type of steel tube | Outer diameter of steel tube | S / D | Permissible deviation | ||||||
| hot rolled (extruded) steel tube | ≤ 102 | – | ± 12.5 % S or ± 0.40, take the greater number | ||||||
| > 102 | ≤ 0.05 | ± 15% S or ± 0.40, take the greater number | |||||||
| > 0.05 ~ 0.10 | ± 12.5% S or ± 0.40, take the greater number | ||||||||
| > 0.10 | + 12.5% S | ||||||||
| - 10% S | |||||||||
| hot expand steel tube | + 15% S | ||||||||
Permissible deviation of the wall thickness of cold drawn (rolled) steel tubes
Unit: mm
| Type of steel tube | Wall thickness | Permissible deviation | ||||||
| Cold drawn (rolled) steel tube | ≤ 3 | 15 – 10 % S or ± 0.15, take the greater number | ||||||
| > 3 | + 12.5% S | |||||||
| - 10% S | ||||||||
Test Requirement
Flattening test
Steel tubes with an outer diameter greater than 22 mm and up to 400 mm, and wall thickness greater than 10 mm should undergo the flattening test. After the samples are flattened
Bending test
Steel tubes with an outer diameter not greater than 22 mm should undergo the bending test. The bending angle is 90o . The bending radius is 6 times the outer diameter of the steel tube.After bending the sample, no fissures or cracks are permitted to appear on the sample.
Macroscopic examination
For steel tubes directly made by continuously cast billets or steel ingots, the supplying party should guarantee that there are no white spots, impurities, sub-surface air bubbles, skull patches or layering on the cross-sectional acid pickled macroscopic tissue of the billet or steel tube.
Non-destructive inspection
According to the demanding party’s request, which is then negotiated between the supplying and demanding parties and indicated in the agreement, ultrasonic flaw detection may be individually performed for steel tubes. The longitudinal manual defect of the reference sample tube should meet the requirements for post-inspection acceptance grade C8 specified in GB/T 5777-1996.
Product Detail
High Pressure Boiler Tube
GB/T5310-2017
ASME SA-106/SA-106M-2015
ASTMA210(A210M)-2012
ASME SA-213/SA-213M
ASTM A335/A335M-2018
Our primary objective is usually to offer our shoppers a serious and responsible small business relationship, offering personalized attention to all of them for Factory Supply GB 3087 20mog JIS G3462 ASTM A209m Steel Round Bar Q235 Q345 Ss400 Carbon Mild Steel Round Bar, How about to start your superior enterprise with our corporation? We’ve been ready, qualified and fulfilled with pride. Let’s start our new business enterprise with new wave.
Factory Supply China Carbon Bar and Carbon Rod, We aim to become the modern enterprise with the commercial ideal of “Sincerity and confidence” and with the aim of “Offering customers the most sincere services and best quality products”. We sincerely ask for your unchanged support and appreciate your kind advice and guidance.
