4145H 120 KSI as per API standard

4145H 120 KSI as per API standard

  • Model NO. Alloy steel 4145H
  • Accept Min order:No
Basic Information
Product Description

4145H 120 KSIasper API standard

AISI 4145H 120 KSI Alloy Steel Bar for Drilling Collar, Drill Pipe, Square Kelly, Lifting Sub, Stabilizer
Hot Rolled Round:dia.50-130 mm.
Forged Round: dia.100-1300 mm.

Delivery Condition
EAF+LF+VD, Hot Rolled or Forged, Machined, Q+T, UT 100% Passed.

Chemical Composition(%)

0.42-0.490.15-0.350.80-1.15≤ 0.020 ≤ 0.025 0.75-1.200.15-0.45≤ 0.25 ≤ 0.30

Mechanical Properties

 Tensile Strength PSI (MPa) Yield Strength PSI (MPa) ElongationReduction of Area Hardness
Min.14000012000014%45%30 HRC (285 HB)
Max.------------------------36 HRC (341 HB)

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.

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.