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ASTM A519 alloy steel drill pipe
, seamless chromoly tubing for sour service
, oil well drill pipe with warranty
ASTM A519 Alloy Steel Oil Well Drill Pipe, Seamless Chromoly Tubing for Sour Service Applications
ASTM A519 Alloy Steel Oil Well Drill Pipe, Seamless Chromoly Tubing for Sour Service Applications
Description
This ASTM A519 Alloy Steel Oil Well Drill Pipe represents the highest standard of performance and reliability for critical drilling operations in sour service environments. Manufactured as seamless chromoly tubing from chromium-molybdenum alloy steel, this specialized drill pipe is specifically engineered to withstand the combined challenges of acidic conditions, high pressures, and demanding mechanical stresses encountered in sour gas and oil fields.
Produced in strict compliance with ASTM A519 specifications, this seamless tubing offers exceptional dimensional accuracy and mechanical consistency throughout its length. The chromoly alloy composition (typically AISI 4130 or 4140 grade) provides superior strength-to-weight ratio, enhanced fatigue resistance, and excellent toughness properties that are maintained even in the presence of hydrogen sulfide (H₂S) and other corrosive elements. The seamless manufacturing process ensures a homogeneous microstructure free from defects, welds, or imperfections that could compromise performance in critical sour service applications.
This drill pipe undergoes specialized heat treatment and quenching processes to achieve optimal mechanical properties while maintaining hardness levels below HRC 22, as required by NACE MR0175/ISO 15156 standards for sour service applications. The material's chemical composition and processing are carefully controlled to provide maximum resistance to sulfide stress cracking (SSC) and hydrogen-induced cracking (HIC), ensuring long-term reliability in the most aggressive downhole environments.
Specification
| Specifications |
ASTM, ASME and API |
| Size |
O.D.: 4 to 219mm W. T.: 0.5 to 20mm |
| Specialized in |
Large Diameter Size |
| Length |
Within 13500mm |
| Type |
Seamless |
| Shape |
Round |
| End |
Plain End, Beveled End, Treaded |
Grade 4130 Pipe Chemical Composition
| Element |
Content (%) |
| Iron, Fe |
97.03 – 98.22 |
| Chromium, Cr |
0.80 – 1.10 |
| Manganese, Mn |
0.40 – 0.60 |
| Carbon, C |
0.280 – 0.330 |
| Silicon, Si |
0.15 – 0.30 |
| Molybdenum, Mo |
0.15 – 0.25 |
| Sulfur, S |
0.040 |
| Phosphorous, P |
0.035 |
Grade 4130 Pipe Mechanical Properties
| Properties |
Metric |
Imperial |
| Tensile strength, ultimate |
560 MPa |
81200 psi |
| Tensile strength, yield |
460 MPa |
66700 psi |
| Modulus of elasticity |
190-210 GPa |
27557-30458 ksi |
| Bulk modulus (Typical for steel) |
140 GPa |
20300 ksi |
| Shear modulus (Typical for steel) |
80 GPa |
11600 ksi |
| Poissons ratio |
0.27-0.30 |
0.27-0.30 |
| Elongation at break (in 50 mm) |
21.50% |
21.50% |
| Reduction of area |
59.6 |
59.60% |
| Hardness, Brinell |
217 |
217 |
| Hardness, Knoop (Converted from Brinell hardness) |
240 |
240 |
| Hardness, Rockwell B (Converted from Brinell hardness) |
95 |
95 |
| Hardness, Rockwell C (Converted from Brinell hardness, value below normal HRC range, for comparison purposes only.) |
17 |
17 |
| Hardness, Vickers (Converted from Brinell hardness) |
228 |
228 |
| Machinability (Annealed and cold drawn. Based on 100% machinability for AISI 1212 steel.) |
70 |
70 |
Key Features and Benefits
NACE MR0175/ISO 15156 Compliance: Certified for sour service applications with controlled hardness
Superior SSC/HIC Resistance: Specialized manufacturing prevents sulfide stress cracking
Enhanced Mechanical Properties: High yield strength (550-750 MPa) with excellent impact toughness
Seamless Reliability: Homogeneous structure ensures consistent performance in critical applications
Corrosion Resistance: Chromium-molybdenum composition provides improved corrosion resistance
Typical Applications
Sour gas and oil field drilling operations
High-pressure/high-temperature (HPHT) wells with H₂S presence
Critical drilling applications in corrosive environments
Downhole tools and components requiring SSC resistance
Workover and completion operations in sour service fields
Quality Assurance
Full traceability and material certification
Comprehensive non-destructive testing (UT, MPI)
Hardness verification throughout length
SSC testing per NACE TM0177 methods
Dimensional inspection to API specifications
Packing
In plywood case and wooden box
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