Project Description
A high-strength chromium-molybdenum steel with high fatigue strength and excellent wear resistance in the as-rolled condition.
Applications:
SANBAR20/95CrMo/C253 is used for integral hollow drill steel, pilot rods and tapered rods.
Chemical Composition(%):
| C | Si | Mn | P | S | Cr | Mo | Ni | Cu |
|---|---|---|---|---|---|---|---|---|
| 0.92-1.03 | 0.25-0.45 | 0.25-0.45 | 0.025 max | 0.025 max | 0.80-1.20 | 0.20-0.30 | 0.25 max | 0.30 max |
Mechanical Properties(T=20°C):
| Tensile Strength Rm (Mpa) | Yield Strength Rp0.2 (Mpa) | Hardness (HRC) |
|---|---|---|
| 1300 min | 850 min | 37-43 |
Decarburization:
The maximum permissible decarburization depth of this hollow drill steel is 0.20 mm (0.008 in.) on the outer surface and 0.10 mm (0.004 in.) on the inner surface.
Machinability:
Machining may require prior annealing.
Forging:
Induction heating to 1000–1100°C (1830– 2010°F), 10–20 seconds. Cooling in air. Forging range 1100–850°C (2010–1560°F).
Heat treatment:
Annealing (induction heating) 850–900°C (1560–1650°F). Cooling in air.
Normalizing (induction heating): 950–1050°C (1740- 1920°F). Cooling in air.
Hardening: Induction heating to 1000–1100°C (1830- 2010°F). Forced cooling in air or oil.
Tempering: Recommended hardness 50 HRC, temperature appr. 500°C (930°F)/0.5 hours. Tempering within one hour after hardening.
We are committed to integrate steel resources in china and serve the global steel market. Our company has more than 15 years of experience in steel researching, production, managing and sales. And our team mostly are based on and worked in national famous steel enterprise before. In the aspect of resources and information, we have established cooperative relationship with nearly hundred enterprises, either state-owned or private owned in China.
What’s more, we have built long, deep and close business relationship with dozens of steel company, Sharing and holding equities with several steel enterprises. Because of the close cooperation with steel companies and our pioneering spirit, which can ensure us stay at the top competition, and ensure our customers get what they really want. We provide preffesional one-stop service to the Contractors of follows project:
- Oil and Gas Pipeline Construction
- Onshore and Offshore
- Boiler Manufacturers
- Oil Refining Equipment
- Petroleum and Chemical Plant Construction
- Fire Protection
- Heating & Air Conditioning
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