SAE AMS6539B-2024
Steel Bars, Forgings, Mechanical Tubing and Forging Stock, 1.7Cr - 3.8Ni - 0.3Mo (0.32 - 0.38C), Aircraft-Quality

Scope: This specification covers an aircraft quality, low alloy steel in the form of bars, forgings, mechanical tubing, and forged stock. These products are generally used for carburized parts requiring a high minimum core hardness, a narrow range, reduced distortion, and compliance with magnetic particle inspection standards, but use is not limited to such applications.

SAE AMS6539B-2024 Referenced Document

AS 1182 Infant and child clothing sizing coding scheme for underwear and outerwear*， 2025-05-09 Update
ASTM A255 Standard Test Method for Determining Hardenability of Steel
ASTM A751 Standard Test Methods, Practices, and Terminology for Chemical Analysis of Steel Products
ASTM E10 Standard Test Method for Brinell Hardness of Metallic Materials
ASTM E112 Standard Test Methods for Determining Average Grain Size
ASTM E140 Standard Hardness Conversion Tables for Metals Relationship Among Brinell Hardness, Vickers Hardness, Rockwell Hardness, Superficial Hardness, Knoop Hardness, and Scleroscope Hardness
ASTM E23 Standard Test Methods for Notched Bar Impact Testing of Metallic Materials
ASTM E381 Standard Method of Macroetch Testing Steel Bars, Billets, Blooms, and Forgings
ASTM E8/E8M Standard Test Methods for Tension Testing of Metallic Materials

2024 SAE AMS6539B-2024 Steel Bars, Forgings, Mechanical Tubing and Forging Stock, 1.7Cr - 3.8Ni - 0.3Mo (0.32 - 0.38C), Aircraft-Quality
2018 SAE AMS6539A-2018 Steel Bars@ Forgings@ and Tubing 1.7Cr - 3.8Ni - 0.3Mo (0.32 - 0.38C) Aircraft-Quality (UNS K54532)
2013 SAE AMS6539-2013 Steel Bars, Forgings, and Tubing 1.7Cr 3.8Ni 0.3Mo (0.32 - 0.38 C) Aircraft-Quality