AISI 4145h Mod Alloy Steel Bar

Product Description

AISI 4145H MOD Alloy Steel DescriptionAISI 4145H 120 ksi, API 7-1 Standards is a chromium molybdenum quality alloy steel specification. As a high tensile steel grade AISI 4145H MOD is primarily supplied in the hardened and tempered condition to 30-36HRc range to AISI 4145H MOD. With a slightly higher carbon content AISI 4145H MOD is similar to AISI 4140 in that it offers good ductility, shock resisting characteristics combined with resistance to wear.
Advantages1 QTC Qualification Test Coupon Passed
2 Superior Hardenability
3 Optimize chemical component
ApplicationsAISI 4145H MOD Steel is commonly used for a variety of applications in the oil and gas sector. Used often for the manufacture of down hole drilling tools such as drill collars. Other applications include gears, shafts for hydraulic presses, rolls for paper mills, pump shafts and tool holders.
Chemical Composition

Grade	C	Mn	Cr	Mo	Si	P	S	Ni	Cu	V	Al%	H max. ppm
Min.	0.420	0.800	0.850	0.150	0.150	-	-	-	-	-	0.020	-
Max.	0.450	1.200	1.200	0.250	0.350	0.025	0.025	0.250	0.300	0.300	0.035	1.500

Heat Treatment

Normalizing temperature	Time	Austenizing temperature	Time	Tempering temperature	Time
1600 - 1750ºF (871 - 960ºC)	Min. 60 minutes	1562 - 1675ºF (850 - 913ºC)	Min. 60 minutes	1050ºF (566ºC)	Min. 60 minutes

Oil or Polymer or Water. For Water Quenching, the temperature of water shall not exceed 38ºC (100ºF) at start of quench. For bath-type quenching, the temperature of water shall not exceed 49ºC(120ºF) at any time during the quench cycle. Mechanical Propertiesas per ASTM A370 - 20

Yield strength minimum (0.2% offset)	Tensile strength minimum	Elongation in 2" (minimum)	Reduction Area (minimum)
120,000 psi (828 MPa)	140,000 psi (966 MPa)	18%	45%

Quality Inspection Specimen test location & QTC Charpy V-notch impact at 21ºC / -32ºC Hardness as per ASTM E10-18: On surface / 1" below surface Volumetric NDE 100% - Ultrasonic Minimum hot work reduction ratio 4.0 to 1 Grain size should be #S or Finer as per ASTM E112 - 13 Surface inspection

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