Sichuan Liaofu Special Steel Company is one of the most experienced manufacturers and suppliers of 65mm aisi 4130 chromoly alloy oil drill pipe in China. With over 20 years' experience, our factory offer high quality products made in China with competitive price. Welcome to contact us for wholesale service.
aisi 4130 chromoly oil drill pipe
AISI 4130 SEAMLESS Pipes to core industries such as refineries, chemical & petrochemical, oil & Gas, Water treatment plant, power plants, offshore, ship building, EPC & other Engineering company.
Chemical Composition
| Carbon (%) | Chromium (%) | Manganese (%) | Molybdenum (%) | Silicon (%) | Phosphorous (%) | Nickel (%) | Sulphur (%) |
| 0.28-0.33 | 0.9-1.1 | 0.4-0.6 | 0.15-0.25 | 0.1-0.35 | 0.035 | 0.25 | 0.04 |
Physical Properties
| Annealing hardness HBS | Cold pull hardness HBS | Preheating temperature ℃ | Quenching temperature ℃ | Holding time min | Hardening medium | Temper temperature ℃ | After tempering Hardness ≥HRC | |
| salt-bath furnace | controlled atmosphere furnace | |||||||
| 235 | 262 | 788 | 1191 | 1204 | 5~15 | air cooling | 522 | 60 |
| Steel plate/Sheet thickness / mm | σb Mpa | σs ≥/Mpa | δ Samples from the standard for 50 mm (2 in) | 180 ° of cold bending test | |
| longitudinal | horizontal | ||||
| Hot-rolled/Cold rolling:5 - 150 | 520 | 415 | 16~18 | 2a | 3.5a |
Products Show
Product Procssing 
cold rolled steel pipe ,it has bright surface,high precision characteristics.
Application 
1. Bare Bundles
2. Bundles with steel straip and woven bag 
3. Wooden box
Our Service
About us
Timely communication
Equipment & technology
Production lines 12 ,professional production team,ensure quality and delivery time 
Quality Control
Stable product quality , inspection 100%before delivery 
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