GB/T 20409 Multi-rifled Seamless Steel Tubes For High-Pressure Boiler
Size range : O.D 5-420 mm
W.T 0.5-50mm
L max12000mm
STEEL GRADE AND CHEMICAL COMPOSITIONS
| Steel Grade | C | Mn | Si | Cr | Mo | S | P |
| 20G | 0.17-0.23 | 0.35-0.65 | 0.17-0.37 | - | - | ≤0.020 | ≤0.025 |
| SA-210 A1 | ≤0.27 | ≤0.93 | ≥0.10 | - | - | ≤0.035 | ≤0.035 |
| SA-210 C | ≤0.35 | 0.29-1.06 | ≥0.10 | - | - | ≤0.035 | ≤0.035 |
| SA-213 T2 | 0.10-0.20 | 0.30-0.61 | 0.10-0.30 | 0.58-0.81 | 0.44-0.65 | ≤0.025 | ≤0.025 |
| SA-213 T12 | 0.05-0.15 | 0.30-0.61 | ≤0.50 | 0.80-1.25 | 0.44-0.65 | ≤0.025 | ≤0.025 |
| 12CrMoG | 0.08-0.15 | 0.40-0.70 | 0.17-0.37 | 0.40-0.70 | 0.40-0.55 | ≤0.020 | ≤0.025 |
| 15CrMoG | 0.12-0.18 | 0.40-0.70 | 0.17-0.37 | 0.80-1.10 | 0.40-0.55 | ≤0.020 | ≤0.025 |
MACHANICAL PROPERTIES AT ROOM TEMPERTURE
| Steel Grade | Rm/Mpa | ReL/Mpa | A | Akv/J |
| N/mm² | N/mm² | % | ||
| 20G | 415-550 | 245 | 24 | 35 |
| SA-210 A1 | ≥415 | 255 | 30 | - |
| SA-210 C | ≥485 | 275 | 30 | - |
| SA-213 T2 | ≥415 | 205 | 30 | - |
| SA-213 T12 | ≥415 | 220 | 30 | - |
| 12CrMoG | 410-560 | 203 | 21 | 35 |
| 15CrMoG | 440-640 | 235 | 21 | 35 |
1~ Incoming Raw Material Inspection
2~ Raw Material Segregation to avoid steel grade mix-up
3~ Heating and Hammering End for Cold Drawing
4~ Cold Drawing and Cold Rolling, on line inspection
5~ Heat Treatment, +A, +SRA, +LC, +N, Q+T
6~ Straightening-Cutting to specified length-Finished Measuring Inspection
7~ Machanical Testing in own labs with Tensile Strength, Yield Strength, Elongation, Hardness, Impact, Mictrostruture etc
8~ Packing and Stocking.
Packing Details : In bundles or in wooden boxes packaging
Delivery Details : 30-60days
What products we do?
------- Invent and produce various Precision Steel Pipes
Our steel pipes cover the following ranges:
Seamless Precision Steel Pipes
Welded Precision Steel Pipes, with DOM production
Seamless Heat Exchanger Steel Pipe
Seamless Boiler Steel Pipes
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
Products Application:
Oil Cylinders
Air Cylinder,
Automotive Cylinder Liners
Boilers, Pressure Vessels
Shell & Heat Exchangers
Jack Lifting
Telescopic Systems
Pneumatic Cylinders
Agricultural Machineries
Who We are ?
-------A professional steel pipes materials inventor, manufacturer and solution provider
Haiyan Sanxin Steel Pipe Co., Ltd 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. 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 is your Guarantee?
1.SO9001:2008 and TS16949 certification, SGS, BV, TUV or other third party inspection is available.
2.High quality with competitive price.
3.Advanced technology, experienced engineer, ISO quality system for quality assurance and traceability.
Do you have agent or distributor in our country?
1.We are recruiting area agent and distributor all over the world, welcome to send us your mail or call us for detail discussion.
How is your production capability?
1.2000 tons monthly production capacity, 5000 tons monthly trading capability
2.Prompt and Timely shipment
How to get the sample?
1.You are requested to pay for sample charges and courier charges from China to your country; and the free sample is according the product like size, steel grade and quantity, please consult our sales for details
2.Sample charges will be refunded when order is placed.
What is your Payment Term?
1.T/T: 30% deposit in advance, the balance 70% paid before shipment
2.30% down payment, the balance 70% paid against L/C at sight
3.Upon negotiation
Who are your customers?
1.Stockists, Distributors,Wholesalors,Agents, Traders, End Users, etc
How long will you react on our requirement?
1.Your requirement would be treated within 24 hours on weekdays. Quotations would be sent upon technical details confirmed by customer!
Any more questions about your doubts, please feel free to send us your emails or call!
Our products are sold all over the world, you can rest assured.
