The 15Mo3 economizer tube is a low-alloy pearlitic heat-resistant steel with superior hardness and toughness compared to SKD steel. Key characteristics include:
Excellent machinability after spheroidizing annealing
High hardness post-quenching
Superior dimensional stability after tempering
Widely used in petroleum, chemical, power, and boiler industries.
Manufacturing Processes
Hot Rolling (Large-diameter Tubes)
Round billets heated to ≈1200°C
Pierced to form hollow shells → Continuously rolled to target dimensions
Advantage: High efficiency for mass production
Cold Drawing (Precision Tubes)
Hot-rolled blanks drawn at room temperature
Multi-pass diameter reduction achieves:
Dimensional accuracy ±0.05mm
Surface roughness Ra≤0.8μm
Critical control: Strict regulation of heating temperature & cooling rate to prevent residual stress
15Mo3 Semaless Steel Tubes for Heat-Resistant Chemical composition:
|
C |
Si |
Mn |
P |
S |
Cr |
Mo |
|
0.12-0.20 |
0.10-0.35 |
0.4-0.8 |
≤0.030 |
≤0.030 |
/ |
0.25-0.35 |
15Mo3 seamless tubes of heatresistant steels Mechanical property:
|
Grade |
Tensile strength Rm |
Yield strength YS |
Enlongation A(％) |
|
15Mo3 |
450-600 |
270 MPa |
22 |
Test and inspection
Packaging and shipping
DIN17175 15Mo3 Seamless steel pipe for boiler factory
