AMS5618/AMS5630 440C


440C is ideal material for applications requiring good toughness, hardness and dimensional stability. After proper heat treatment and passivation, it can have hardness of minimum HRC58 and also be corrosion resisted.

 

High Precision Application

HRGQ offers highest standard GRADE 3 product that mainly for aerospace industry in ball bearing application that requires highest precision and reliability.

Standard grade from G10-G200 are common product manufactured in house. Those products are also used on aircraft in multiple applications such as engine, airframe controlling, cargo loading, etc.

Capable size range: 1/16” (1.5875mm) – 1” (25.4mm)

(Surface magnification: 400X)
(Roundness 0.05um measured by Talyrond)

 

Global Supply Chain

HRGQ procures DFARS compliant 440C steel from USA, JAPAN and Europe. Material specification including AMS5630, AMS-QQ-S-763, ASTM-A276 and AMS 5880.

Imported Aircraft-quality AMS 5618 material is also available. It is being vacuum induction melting (VIM) and vacuum arc remelting (VAR).

 

HRGQ Manufacturing Processes

HRGQ is ISO/AS certified company and NADCAP accredited for heat treating. Our modern manufacturing and testing facilities have guaranteed quality that satisfying customers.

Heat Treatment: Followed by AMS2750, AMS2759, AMS 2759/5. Sub-zero treatment is conducted.

(Sub-zero treatment)

Passivation: Followed by AMS2700 (2 hours salt spray tests)

 

Quality Control

HRGQ is fully implementing AS9100 standard in operation. Traceability of product is recorded throughout manufacturing process.

Inspection Items for 440C:

  • Raw material incoming inspection
  • Heat treatment compliance
  • Surface contamination
  • Decarburization
  • Carburization/Nitriding
  • Intergranular attack
  • Retained austenite
  • Salt spray test
  • Dimensional

 

Material Analysis

   Carbon……………….  0.95% - 1.20%

   Manganese………..  Max 1.00%

   Silicon………………… Max 1.00%

   Phosphorus………… Max 0.04%

   Sulphur………………. Max 0.03%

   Chromium………….. 16.00% to 18.00%

   Molybdenum……… 0.40% -0.65%

   Nickel…………………. Max 0.75%

   Copper……………….. Max 0.50%