AISI 4140 42CrMo4 SCM440 SAE 4140 Forged Forging Forge Steel DTH Hammer Drilling Drill Bits Body Bodies Heads Shanks

We are professional AISI 4140 42CrMo4 SCM440 SAE 4140 Forged Forging Forge Alloy Steel DTH Hammer Drilling Drill Bits Body Bodies Heads Shank  from china

• Applications

  AISI 4140 is commonly used for a variety of applications in the oil and gas sector. Typical applications include components such as connection rods, collets, conveyor pins, gears, stem assemblies, pump shafts and tool holders.

  Forging

  Preheat the steel carefully, then raise the temperature to 1150-1200°C for forging. Do not forge below 850°C.

  Annealing

  Heat the AISI 4140 slowly to 800-850°C and allow enough time for the steel to be thoroughly heated. Cool slowly in the furnace to 480°C followed by air cooling.

  Stress Relieving

  When parts are heavily machined, ground or otherwise subject to cold work, stress relieving will be beneficial prior to hardening.

  Hardening

  AISI 4140 steel is usually supplied ready heat treated to 18-22HRC. If further heat treatment is required annealed AISI 4140 should be heated slowly to 840-875°C and after adequate soaking at this temperature quench in oil. Temper as soon as the tools reach room temperature.

  Tempering

  Heat the AISI 4140 carefully to a suitable temperature selected by reference to a tempering chart or table (usually between 550-700°C, soak at the temperature for 2 hours per 25mm of ruling section, then allow to cool in air. Tempering between 250-375°C is not advised as tempering within this range will seriously reduce the impact value.

  Typical Mechanical Properties*

  Tensile KSI 0.2% Proof Stress KSI  Elongation % Reduction of Area % Hardness HRc Hardness Brinell Min 100 80 20 40 18 217 Max 130 110 22

Product Flow

1.Inquiry with drawings in details.
2.Confirm steel material, chemical compositions, mechanical properties, tolerance.
3.Confirm payment terms,order materials or check material in stock.
4.Check material chemical compositions, material weight, dimensions.
5.Cut materials record weight, making mould for casting of pr-hearting for forging.
6.Forging ratios, heat treatment ,dimension check.
7.Rough machining, UT test,heat treatment.
8.Semi-finish, quenching,
8.Fine machining, UT test, dimension inspection, mechanical properties test.
9.Customer inspection, packing, delivery arrangement.
Steel ingot making
EAF+LF+VD/VAD or ESR
Manufacturing process
EAF + LF + VD+ Forging+ Normalizing & Tempering + Rough machining + UT test + Quenching & Tempering + Precision machining
Report
Chemical composition report, Physical properties report, Heat treatment report, Dimensional inspection report, NDT report
Nondestructive test (NDT)
UT ( ultrasonic testing ), MT ( magnetic particle testing ), PT ( penetrant testing)
Quality certification : ISO 9001: 2008, IQNET

• Certification:

  ISO 9001:2008, PED Certificate,API, TUVRheinland, Bureau Veritas (BV), Lloyd Register (LR), ABS, RINA, Germanischer Lloyd (GL), Korean Register of Shipping (KR), Det Norske Veritas (DNV), Nippon Kaiji Kyokai (NK);




•  Forging & Heat Trea

Name&Description	Capacity	Quantity
3600Thydraulic press	Max. single forging in 18T	1
2000T hydraulic press	Max. single forging in 9T	2
800 hydraulic press	Max. single forging in 5T	1
6T electrical hydraulic hammer	Max.single forging in 5T	1
3T electrical hydraulic hammer	Max.single forging in3T	1
Air hammer	Max.single forging from250kg to 1000kg	7
Forging operation machine	Max.singe forging from20T-5T	7
Heat treatment Furance	Max.8000*5000*1500mm	11
CNC driling machine	Max.5000mm	2
Vertical lathe	From 1600 to 5000mm	60
Horizontal lathe	Max.5000mm	70
Band sawing machine	260-1300mm	36