GE Additive

Hot Isostatic Pressing

Recommended* Hot Isostatic Pressing (HIP) Conditions for Common Additive Manufactured Materials

 GE Additive 
 Designation

 

 Industry
 Designation

 

 HIP Temp (°C)**
 

 HIP Temp (°F)**
 

 HIP Press. (MPa)**
 

 HIP Press. (ksi)**
 

 HIP time (hr.)**
 

 Aluminum
 
 CL 35AL  F357  538  1000  100  14.5  8 (minimum)
 CL 36AL   A205  514 +/- 8  975 +/- 15  100  14.5  11 +/- 0.5
 Cobalt
 
 CL 110CO  F75 CoCrMo  1204  2200  100  14.5  4
 Arcam ASTMF75 CoCr  F75 CoCrMo  1200  2192  100  14.5  4
 CL 111CO  Alloy 188  1121   2050  100  14.5  4
 Iron
 
 CL 25MS  M152  1149  2100  100  14.5  5
 Nickel
 
 CL 100NB  Alloy 718

 1163

 2125  100  14.5  4
 1038  1900  100  14.5  4
 Titanium
 
 CL 41 TI ELI  Ti-6Al-4V  899  1650  100  14.5  3
 Ti-6Al-4V  Ti-6Al-4V  920  1688  100  14.5  2
 Ti-6Al-4V ELI  Ti-6Al-4V ELI  920  1688  100  14.5  2
 Grade 2  Grade 2 Ti  920  1688  100  14.5  2

 

* Recommendations based on investigation of Laser Cusing and/or Electron Beam EBM deposited materials
** Standard tolerances except where listed on temperature and time are as follows:  +/- 14C◦ (+/-25F◦), +/-1hr. Pressure is considered minimum.

 

Hot Isostatic Pressing (HIP)

The hot isostatic pressing process combines high temperature (up to 2200ºC) and isostatic inert gas pressure (from to 100 to 3100 bar) in a high pressure containment vessel. Heat and pressure, applied simultaneously, eliminate internal voids and residual porosity therefore improving fatigue resistance of fabricated parts while retaining a very fine grained additive structure.

Advantages

  • Increases material properties such as resistance to stress and cracking by elimination of internal voids. 
  • Improves uniformity of additive materials and increases quality and repeatability of performance.