| Type: | Round |
|---|---|
| Standard: | AISI, ASTM, DIN, JIS, GB, BS |
| Composition: | Check Detailed Description |
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4145H 120 KSIasper API standard
AISI 4145H 120 KSI Alloy Steel Bar for Drilling Collar, Drill Pipe, Square Kelly, Lifting Sub, Stabilizer
Dimensions
Forged Round: dia.100-1300 mm.
Delivery Condition
EAF+LF+VD, Hot Rolled or Forged, Machined, Q+T, UT 100% Passed.
Chemical Composition(%)
| C | Si | Mn | P | S | Cr | Mo | Ni | Cu |
| 0.42-0.49 | 0.15-0.35 | 0.80-1.15 | ≤ 0.020 | ≤ 0.025 | 0.75-1.20 | 0.15-0.45 | ≤ 0.25 | ≤ 0.30 |
Mechanical Properties
| Tensile Strength PSI (MPa) | Yield Strength PSI (MPa) | Elongation | Reduction of Area | Hardness | |
| Min. | 140000 | 120000 | 14% | 45% | 30 HRC (285 HB) |
| Max. | ------ | ------ | ------ | ------ | 36 HRC (341 HB) |
Characteristics
AISI / SAE 4145H grade is a low-alloy steel containing chromium and molybdenum as strengthening agents. The steel has good fatigue strength and impact toughness in low temperature, weldability and machinability.
Applications
This low-alloy steel is used in heat treated condition with 120 KSI minimum yield strength for oil and gas equipments of well drilling, wellhead, Christmas tree, etc.
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