Seamless Carbon Steel Tube Manufacturing Process!
4 week ago
Q245, Q345, 15Mo, 20Mo, 12CrMo Submerged-arc Welded Steel Pipe for High Temperature and High Pressure
Material
Q245, Q345, 15Mo, 20Mo, and 12CrMo are high-strength low-alloy and alloy structural steels designed for demanding high-temperature and high-pressure applications. These grades offer a balance of tensile strength, toughness, and thermal stability, making them ideal for manufacturing submerged-arc welded (SAW) steel pipes used in boilers, pressure vessels, and pipeline systems operating under severe service conditions.
Specification
-
Outer Diameter (OD): 406 mm – 1620 mm (customizable)
-
Wall Thickness: 8 mm – 60 mm (customizable)
-
Length: 6 m – 12 m (fixed or random length; longer lengths available by request)
-
Manufacturing Process: Longitudinal or spiral submerged-arc welding (LSAW or SSAW)
-
Standards: GB/T 9711, GB/T 8163, GB/T 8162, ASME SA-106, ASTM A335 (where applicable)
-
Heat Treatment: Normalizing, Quenching + Tempering (as required)
-
End Finish: Plain end, bevelled end, or grooved end; protective caps optional
Key Features
-
High-Temperature Strength – Maintains mechanical integrity at elevated temperatures.
-
High-Pressure Resistance – Suitable for steam, gas, and liquid transport under high internal pressures.
-
Excellent Weldability – Submerged-arc welding ensures deep penetration and uniform weld seams.
-
Corrosion and Oxidation Resistance – Alloy elements such as molybdenum and chromium improve durability.
-
Dimensional Accuracy – Precision forming and controlled heat treatment guarantee tight tolerances.
-
Customizable Sizes & Lengths – Adaptable to different engineering and installation requirements.
Chemical Composition (Typical Values, %)
| Steel Grade | C | Si | Mn | P (max) | S (max) | Cr | Mo | V | Ni |
|---|---|---|---|---|---|---|---|---|---|
| Q245 | ≤0.20 | ≤0.35 | 0.40-0.70 | 0.030 | 0.030 | — | — | — | — |
| Q345 | ≤0.20 | ≤0.50 | 1.00-1.60 | 0.030 | 0.030 | — | — | — | ≤0.30 |
| 15Mo | ≤0.15 | ≤0.35 | 0.40-0.80 | 0.025 | 0.025 | — | 0.25-0.35 | — | — |
| 20Mo | ≤0.20 | ≤0.35 | 0.40-0.80 | 0.025 | 0.025 | — | 0.25-0.35 | — | — |
| 12CrMo | ≤0.15 | ≤0.50 | 0.40-0.80 | 0.025 | 0.025 | 0.90-1.20 | 0.25-0.35 | — | — |
Mechanical Properties
| Steel Grade | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Impact Toughness (J) |
|---|---|---|---|---|
| Q245 | 370-500 | ≥245 | ≥25 | ≥27 |
| Q345 | 470-630 | ≥345 | ≥21 | ≥27 |
| 15Mo | 410-550 | ≥245 | ≥22 | ≥27 |
| 20Mo | 410-560 | ≥275 | ≥20 | ≥27 |
| 12CrMo | 470-640 | ≥295 | ≥20 | ≥27 |
Steel Grade
-
Carbon Structural Steel: Q245
-
Low-Alloy High-Strength Steel: Q345
-
Alloy Steels for Pressure Vessels and Boilers: 15Mo, 20Mo, 12CrMo
Application
-
Power Generation: Boiler tubes, steam pipelines, superheater coils.
-
Petrochemical Industry: Refinery piping, high-pressure heat exchangers.
-
Chemical Processing: Reaction vessels, process piping for hot corrosive fluids.
-
Oil & Gas: High-pressure transmission lines for oil, gas, and steam.
-
Industrial Boilers: Economizer, reheater, and header piping.
Possible Alternative Grades
-
ASTM A335 P1, P2, P11 (for high-temperature service)
-
ASTM A106 Grade B/C (for high-pressure applications)
-
ASTM A671, A672 (welded pipes for high-temperature service)
-
EN 10216-2 16Mo3, 13CrMo4-5
Q: Are you trading company or manufacturer ?
A: manufacturer,also can do trading.
Q: How long is your delivery time?
A: Generally speaking,it is 10-15 days if the goods are in stock,or it is 30-40 days if the goods are not in stock, it is according to quantity.
Q: Do you provide samples? is it free or extra ?
A: Yes, we could offer the sample for free charge but need pay the cost of freight.
Q: What is your terms of payment ?
A: Payment<=2000USD, 100% in advance. Payment>=2000USD, 30% T/T in advance ,balance before shippment.
If you have another question, pls feel free to contact with me.
Similar Video Recommendation
You May Also Like
If you are interested in the product, contact Bossgoovideo.com for more information
- *To:
- TORICH INTERNATIONAL LIMITED
- *Message:
-
Submit
Main Product:
Seamless Steel Tubes,
Welded Precision Steel Pipes,
Automotive Steel Tubes,
Carbon steel tubes,
Stainless Steel Tubes,
Special Shaped Steel Tubes
You May Also Like