• Model NO.：4145H Hot Rolled Round
• Special Use：High-strength Steel Plate, Wear Resistant Steel, Silicon Steel, Cold Heading Steel, Free Cutting Steel, Mold Steel
• Application：Tool Steel Bar
• Transport Package：Nude Packing
• Specification：Diameter: 50-130mm
• Trademark：Ningbo Ningshing
• Origin：China

Basic Info.

Model NO. 4145H Hot Rolled Round Special Use High-strength Steel Plate, Wear Resistant Steel, Silicon Steel, Cold Heading Steel, Free Cutting Steel, Mold Steel Application Tool Steel Bar Transport Package Nude Packing Specification Diameter: 50-130mm Trademark Ningbo Ningshing Origin China

Product Description

 

4145H 120 KSIasper API standard

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