16Mo3 is a low-alloy heat-resistant steel with excellent high-temperature strength, creep resistance and thermal stability, specially designed for high-temperature and high-pressure industrial working conditions. It features good weldability and cost-effectiveness, and is a core material for pressure-bearing equipment in energy, petrochemical and thermal power industries, complying with EN 10028-2 and DIN 17155 core standards.
Compliance:EN 10028-2 (main), DIN 17155|Available forms:Plates, pipes, bars, forgings|Long-term service temperature:350–550℃
| C (%) | 0,12-0,20 |
| <= 0,35 | |
| 0,40-0,90 | |
| P (%) | <= 0,025 |
| S (%) | <= 0,010 |
| V (%) | |
| 0,25-0,35 | |
| <= 0,30 |
Superior high-temperature performance: Maintains stable mechanical properties during long-term operation at 350–550℃, with excellent creep and thermal fatigue resistance, adapting to continuous high-temperature working conditions.
: Matches common welding processes (manual arc welding, gas metal arc welding) with dedicated electrodes; proper preheating and post-weld heat treatment can avoid cracks and ensure reliable joint performance.
Reliable pressure-bearing capacity: As a professional pressure vessel steel, it resists medium and high pressure (up to 30MPa), meeting the safety requirements of pressure-bearing equipment such as boilers and reactors.
: No obvious performance attenuation under cyclic temperature changes, with good oxidation resistance, effectively extending the service life of components and reducing maintenance costs.
High cost-effectiveness: Compared with high-alloy heat-resistant steels, it has lower raw material and processing costs while satisfying key performance demands, achieving an optimal balance of performance and economy.
Process Characteristics of 16Mo3
: It has good weldability and is compatible with common welding methods such as manual arc welding and gas metal arc welding. Preheating (150-200℃) and post-weld heat treatment (600-650℃) are essential to eliminate residual stress and avoid cold cracks. The welding joint has high strength and toughness, consistent with the base metal performance.
: Suitable for both hot and cold forming. Hot forming at 850-900℃ ensures good plasticity and reduces deformation resistance, with slow cooling to prevent material brittleness. Cold forming can be carried out at room temperature, but excessive deformation should be avoided; stress relief annealing is required if necessary.
: Normalizing (890-950℃, air cooling) is the core heat treatment process, which refines grain structure and improves mechanical properties. Stress relief annealing effectively reduces internal stress of welded and formed parts, ensuring dimensional stability during service.
: It can be processed by flame cutting, plasma cutting and mechanical machining. Flame cutting needs proper preheating to prevent edge cracking. Machining with high-speed steel or carbide tools ensures good surface finish, with moderate cutting speed and feed rate to reduce tool wear.
: Shot blasting or pickling is required to remove oxide scale and impurities before installation. It has good surface processability, and anti-corrosion coating can be applied to enhance durability in harsh environments, without affecting its inherent performance.
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What is the standard thickness range of 16Mo3 steel plates?
The standard thickness range of 16Mo3 steel plates is usually 3-150 mm. Thicker plates may require additional heat treatment to ensure uniform mechanical properties across the entire thickness.
What is the tensile test requirement for 16Mo3 steel?
The tensile test for 16Mo3 steel requires sampling according to EN 10028-2, testing at room temperature. The test should confirm tensile strength (410-530 MPa), yield strength (>=235 MPa), and elongation (>=22%).
What is the impact test result of 16Mo3 steel?
16Mo3 steel typically has a Charpy V-notch impact energy of >=30 J at 20℃. This indicates good toughness, ensuring the steel can absorb energy without brittle fracture under impact loads.
Can 16Mo3 steel be used in boiler tubes?
Yes, 16Mo3 steel is commonly used to make boiler tubes (water wall tubes, superheater tubes). Its high-temperature resistance and creep strength can withstand the high temperature and pressure inside boilers.
What is the price trend of 16Mo3 steel?
The price of 16Mo3 steel fluctuates with raw material (iron ore, molybdenum) prices, market supply and demand, and global economic conditions. It is usually higher than ordinary carbon steel due to its alloy composition.
What are the storage requirements for 16Mo3 steel?
16Mo3 steel should be stored in a dry, well-ventilated warehouse to avoid moisture and rust. It should be separated from corrosive substances, and the surface should be protected by anti-rust oil or packaging during storage.
What is the difference between 16Mo3 and 20MoCr4 steel?
16Mo3 is a pressure vessel steel with low alloy content (Mo mainly), while 20MoCr4 is a case-hardening steel containing Mo, Cr, with higher hardenability, used for gears, shafts, etc., not for pressure equipment.
Can 16Mo3 steel be machined?
Yes, 16Mo3 steel has good machinability. It can be turned, milled, drilled, and tapped with ordinary cutting tools. Proper cutting speed and coolant should be used to ensure machining accuracy and tool life.
What is the certification required for 16Mo3 steel?
16Mo3 steel for pressure vessels usually requires EN 10204 3.1 or 3.2 certification. This certification confirms the steel's chemical composition, mechanical properties, and quality meet standard requirements.
What is the service life of 16Mo3 steel in high-temperature pressure equipment?
The service life of 16Mo3 steel in high-temperature pressure equipment is usually 15-25 years, depending on operating conditions (temperature, pressure, medium corrosion). Regular inspection and maintenance can extend its service life.