4145H 120 KSI as per API standard
- Model NO. Alloy steel 4145H
- Accept Min order:No
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.
EAF+LF+VD, Hot Rolled or Forged, Machined, Q+T, UT 100% Passed.
|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|
|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)|
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.