Ams 2759 2 __full__ Jun 2026

Success under AMS 2759/2 requires precision at every stage. Here are the "make-or-break" steps:

In the aerospace sector, if it isn't written down, it didn't happen. AMS 2759-2 enforces rigorous documentation requirements. This includes:

is a critical specification for the aerospace industry, enabling safe and repeatable production of low-alloy steel components with tensile strengths exceeding 220 ksi. Strict control of austenitizing, quenching, double tempering, and hydrogen embrittlement relief is essential. Compliance with this standard ensures that parts meet the demanding requirements for fracture toughness, fatigue life, and structural integrity in safety-critical applications.

: Partial decarburization is typically limited to 0.005 inches .

| Issue | Cause | Prevention | |-------|-------|-------------| | Low tensile strength | Over-tempering | Control tempering temp ±10°F | | Quench cracking | Severe quench rate | Use slower oil, avoid sharp corners | | Decarburization | Poor atmosphere | Use vacuum or endothermic gas | | Retained austenite | Insufficient tempering | Double temper mandatory | | Hydrogen embrittlement | Plating without baking | Strict adherence to post-plate bake |

The ultimate pass/fail criteria for AMS 2759-2 is often mechanical testing. The specification defines hardness requirements, typically using the Rockwell C scale (HRC). It details sampling plans—how many parts per lot must be tested to statistically validate the batch.

AMS 2759/2 covers the requirements for the heat treatment of carbon and low-alloy steel parts. It is intended for parts made from steels such as: 300M 98BV40