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AISI 4145h Mod Alloy Steel Bar1
Steel Products4145h ModAlloy Steel Bar
Hunan Shunfu Metal Material Co., Ltd.
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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 Passed2 Superior Hardenability3 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 CompositionGradeCMnCrMoSiPSNiCuVAl%H max. ppmMin.0.4200.8000.8500.1500.150-----0.020-Max.0.4501.2001.2000.2500.3500.0250.0250.2500.3000.3000.0351.500 Heat TreatmentNormalizing temperatureTime Austenizing temperatureTime Tempering temperatureTime 1600 - 1750oF(871 - 960oC)Min. 60 minutes1562 - 1675oF(850 - 913oC)Min. 60 minutes1050oF (566oC)Min. 60 minutesOil 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 - 20Yield strength minimum (0.2% offset)Tensile strength minimumElongation in 2" (minimum)Reduction Area (minimum)120,000 psi (828 MPa)140,000 psi (966 MPa)18%45% Quality InspectionSpecimen test location & QTCCharpy V-notch impact at 21oC / -32oCHardness as per ASTM E10-18: On surface / 1" below surfaceVolumetric NDE 100% - UltrasonicMinimum hot work reduction ratio 4.0 to 1Grain size should be #S or Finer as per ASTM E112 - 13Surface inspection
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