SYQ-P110
Alloy SteelSYQ-P110
Specialty steel grade. Oil country tubular goods, enterprise standard. (SY/Q; equiv SY 4130 mod). Nominal values—confirm mill certificate.
Chemical Composition (%)
| C | 0.25 |
|---|---|
| CR | 0.8 |
| MO | 0.15 |
Mechanical Properties
Tensile:≥700 MPa;Yield:≥580 MPa
Chinese Standard
Q SYQ-P110
Applications
石油专用管企标。,Pipe
Available Forms
Low-alloy engineering steel with enhanced hardenability and strength from alloying elements. Chromium (≈0.95%) improves hardenability, wear and corrosion resistance. Molybdenum (≈0.2%) raises high-temperature strength and prevents temper embrittlement. Applied to gears, shafts, bolts, connecting rods, pressure parts and heavy forgings in automotive, energy and machinery sectors.
Uses
Austenitize at 820–870 °C (oil or water quench depending on section) and temper at 400–650 °C to the required strength/toughness balance.
Heat Treatment
Weldable with standard procedures; preheat may be needed for thick sections or higher-carbon/ alloy grades. Protect from decarburization during heating (controlled atmosphere or protective coating).
Precautions
SY / SY企标 4130 mod
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