4130 P+X Alloy Steel

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Heat Treatment
Cold Processing
Hot Working

4130 P+X Alloy Steel

4130 p x alloy steel

4130 p x alloy steel

 

Introduce

AISI 4130 75K, PSL 3, API 6A Standards, Temperature Class P+X, NACE MR0175:2015

 

Chemical Composition

Grade C Mn Cr Mo Si P S Ni Cu V H max. ppm
Min. 0.280 0.400 0.800 0.150 0.150
Max. 0.330 0.600 1.100 0.250 0.350 0.025 0.025 0.350 0.350 0.300 2.000

 

Heat Treatment

Normalizing temperature Time Austenizing temperature Time Tempering temperature Time
Min. 1620℉ (899℃) Min. 60 minutes 1575 – 1625℉

(857 – 885℃)

Min. 60 minutes Min. 1238℉ (670℃) Min. 60 minutes

Oil or Polymer or Water. For Water Quenching, the temperature of water shall not exceed 38℃ (100℉) at start of quench. For bath-type quenching, the temperature of water shall not exceed 49℃(120℉) at any time during the quench cycle.

Mechanical Properties

as per ASTM E21-20 for P+X Grade

Yield strength

minimum (0.2%)

Tensile strength minimum Elongation in

2” (minimum)

Reduction Area

(minimum)

75 ksi (517MPa) 95 ksi (655 MPa) 18% 35%

 

Quality Inspection

  • Specimen test location & QTC
  • Charpy V-notch impact
  • 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