16Mo3 is a low-alloy heat-resistant steel with excellent high-temperature strength and creep resistance, widely used in the fabrication of pressure vessels, boilers and industrial piping systems that operate under elevated temperature and pressure conditions. It features good weldability and thermal stability, making it a reliable material choice for energy, petrochemical and power generation industries where consistent performance at high temperatures is essential.
16Mo3 - Chemical Composition
|
Element |
Percentage % |
Element |
Percentage % |
|
C |
0.12/0.20 |
Ni |
0.30 |
|
Si |
0.35 |
Nb |
- |
|
Mn |
0.40/0.90 |
Ti |
- |
|
P |
0.025 |
V |
- |
|
S |
0.010 |
Al |
- |
|
Cr |
0.030 |
N |
0.012 |
|
Mo |
0.25/0.35 |
Cu |
0.30 |
16Mo3 - Mechanical Properties
| Grade |
Thickness |
Temperature (°C) |
|||||||||
|
50 |
100 |
150 |
200 |
250 |
300 |
350 |
400 |
450 |
500 |
||
|
(mm) |
MPa |
MPa |
MPa |
MPa |
MPa |
MPa |
MPa |
MPa |
MPa |
MPa |
|
| 16Mo3 |
≤16 |
273 |
264 |
250 |
233 |
213 |
194 |
175 |
159 |
147 |
141 |
|
|
>16 ≤40 |
268 |
259 |
245 |
228 |
209 |
190 |
172 |
156 |
145 |
139 |
|
|
>40 ≤60 |
258 |
250 |
236 |
220 |
202 |
183 |
165 |
150 |
139 |
134 |
|
|
>60 ≤100 |
238 |
230 |
218 |
203 |
186 |
169 |
153 |
139 |
129 |
123 |
|
|
>100 ≤150 |
218 |
211 |
200 |
186 |
171 |
155 |
140 |
127 |
118 |
113 |
|
|
>150 ≤250 |
208 |
202 |
191 |
178 |
163 |
148 |
134 |
121 |
113 |
108 |
Applications of 16Mo3
16Mo3 is a low-alloy heat-resistant steel widely utilized in high-temperature and high-pressure industrial fields due to its excellent comprehensive performance. Its main applications are as follows:
Boiler Manufacturing: It is a core material for boiler components such as water wall tubes, superheater tubes, economizer tubes and boiler drums. These parts need to withstand long-term operation at 350-550℃ and high pressure, and 16Mo3's good high-temperature strength and creep resistance can ensure operational safety.
Pressure Vessels: Used in the production of pressure vessels for petrochemical, chemical and energy industries, such as hydrogenation reactors, gas storage tanks and heat exchangers, which handle high-temperature media like steam, oil and gas.
Industrial Piping: Applied to high-temperature and high-pressure pipelines in power plants, refineries and chemical plants for transporting steam, hot oil and other media, with reliable corrosion resistance and thermal stability.
Thermal Power Equipment: Utilized in auxiliary components of thermal power generation systems, including steam headers and connecting pipes, adapting to the cyclic high-temperature working environment of power generation equipment.
Petrochemical Equipment: Used in equipment such as catalytic cracking units and hydrocracking reactors, resisting the erosion of high-temperature and corrosive media in petrochemical processing.
Application Conditions of 16Mo3
To give full play to its performance, 16Mo3 must meet specific application conditions, mainly covering the following aspects:
Temperature Range: Suitable for long-term operation at 350-550℃. Beyond 550℃, its creep resistance and mechanical properties will decrease significantly, affecting service life.
Pressure Requirement: Applicable to medium and high-pressure environments (usually 10-30MPa). It must pass strict pressure testing before use to avoid leakage risks.
Medium Compatibility: Suitable for neutral or weakly alkaline media such as steam and hot water. It is not recommended for strong acid, strong alkali or highly corrosive media to prevent material corrosion.
Welding and Heat Treatment: Welding must use matching electrodes (such as E5015-G) and strict preheating (150-200℃) and post-weld heat treatment (600-650℃) to avoid welding cracks and ensure joint performance.
Operating Environment: It should be used in a dry and well-ventilated environment. Avoid long-term exposure to humid, dusty or high-salt environments to prevent surface oxidation and corrosion.
Advantages of 16Mo3
Superior high-temperature performance
It boasts excellent high-temperature strength and creep resistance, maintaining stable mechanical properties during long-term operation at 350–550℃, which is the core advantage for high-temperature and high-pressure working conditions.
Excellent weldability
With good welding adaptability, it can be welded with matching electrodes and standard processes; proper preheating and post-weld heat treatment can avoid welding cracks, ensuring firm and reliable welded joints for easy fabrication of large equipment.
Outstanding thermal stability
It has strong resistance to thermal fatigue and oxidation at working temperatures, with no obvious performance attenuation under cyclic temperature changes, effectively extending the service life of components and reducing maintenance frequency.
Reliable pressure-bearing capacity
As a dedicated pressure vessel steel, it has high medium and high-pressure resistance, meeting the pressure-bearing requirements of industrial equipment such as boilers and reactors, and ensuring operational safety under rated pressure.
Cost-effective performance
Compared with high-alloy heat-resistant steels, it has lower raw material and processing costs while meeting the key performance demands of high-temperature industrial fields, achieving an optimal balance between performance and economic efficiency.
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What is 16Mo3 steel?
16Mo3 is a European standard alloy steel mainly composed of iron, carbon, and molybdenum. It belongs to the EN 10028 standard, with good high-temperature resistance and creep strength, widely used in pressure vessels and boiler manufacturing.
What are the main chemical components of 16Mo3 steel?
The main chemical components of 16Mo3 steel include C (0.12-0.20%), Si (0.10-0.35%), Mn (0.40-0.70%), Mo (0.25-0.35%), P ≤ 0.025%, S ≤ 0.015%, and Fe as the base element.
Which standard does 16Mo3 steel comply with?
16Mo3 steel complies with the European standard EN 10028-2, which specifies technical requirements for non-alloy and alloy steels for pressure purposes, covering chemical composition, mechanical properties and heat treatment.
What is the tensile strength of 16Mo3 steel?
The tensile strength of 16Mo3 steel is typically between 410-530 MPa. This strength level ensures it can withstand certain pressure and load, making it suitable for high-pressure equipment in industrial environments.
What is the yield strength of 16Mo3 steel?
The yield strength of 16Mo3 steel is at least 235 MPa (for thickness ≤ 16mm). It increases slightly with thickness but remains stable, providing good structural stability and load-bearing capacity for pressure components.
What is the maximum operating temperature of 16Mo3 steel?
16Mo3 steel can operate continuously at a maximum temperature of about 530°C. Its molybdenum content enhances high-temperature creep resistance, preventing deformation or failure under long-term high-temperature conditions.
What are the common applications of 16Mo3 steel?
16Mo3 steel is widely used in manufacturing pressure vessels, boilers, heat exchangers, and pipelines for petrochemical, power generation, and chemical industries due to its excellent high-temperature and pressure resistance.
Does 16Mo3 steel require heat treatment before use?
Yes, 16Mo3 steel usually needs normalizing heat treatment (heating to 890-950°C, holding, then air cooling) to refine grains, improve mechanical properties, and ensure uniformity for safe service in high-pressure environments.
What is the elongation at break of 16Mo3 steel?
The elongation at break of 16Mo3 steel is at least 22% (for thickness ≤ 16mm). This good ductility allows the steel to deform without breaking when subjected to external forces, enhancing its safety in practical applications.
Can 16Mo3 steel be welded?
Yes, 16Mo3 steel has good weldability. However, preheating (to 80-150°C) and post-weld heat treatment (stress relief annealing) are recommended to avoid weld cracks and reduce residual stress, ensuring weld joint quality.