SAE International
SAE Standards Works
SAE International
Contact Us | Help | Shopping Cart
SAE Login

USCAR5-4 - Avoidance of Hydrogen Embrittlement of Steel

Document Number: USCAR5-4
Revision Number: 4
Avoidance of Hydrogen Embrittlement of Steel
This standard outlines the conditions that enhance the risk of hydrogen embrittlement of steel and defines the relief procedures required to minimize the risk of hydrogen embrittlement. It is intended to control the process.

Hydrogen embrittlement of steel, which can cause brittle fractures under stress, occurs as a result of the absorption of hydrogen during cleaning, phosphate coating and plating processes. The susceptibility to hydrogen embrittlement increases with increasing stress (internal or externally applied stress) and increasing material strength.

Hardness readings in this specification are in Vickers scale. SAE J417 should be referred to for conversion to other scales.

Recent Activity
Date Type