SAE AMS6360R-2023
Steel Tubing, Seamless, 0.95Cr - 0.20Mo (0.28 - 0.33C) (SAE 4130), Normalized or Stress Relieved

Standard No.

SAE AMS6360R-2023

Release Date

2023

Published By

Society of Automotive Engineers (SAE)  US  /  SAE

Latest

SAE AMS6360R-2023

Introduction

Standard Overview and Technology Evolution

AMS6360R is an aerospace material specification released by SAE International in December 2023, replacing AMS6360P. This standard specifies seamless mechanical steel tubes with a composition of 0.95Cr-0.20Mo (0.28-0.33C), corresponding to UNS G41300 steel grade.

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Core Technical Requirements

Chemical Composition Requirements

Element	Minimum Value(%)	Maximum Value(%)
Carbon (C)	0.28	0.33
Chromium (Cr)	0.80	1.10
Molybdenum (Mo)	0.15	0.25
Phosphorus (P)	-	0.025

Mechanical Performance Indicators

Depending on the pipe size, the minimum tensile strength requirements are:

• Wall thickness ≤ 0.188 inches: 95 ksi (655 MPa)
• Wall thickness > 0.188 inches: 90 ksi (621 MPa)

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Key Technology Updates

Major Revisions to the 2023 Edition

1. Added AMS2301 Periodic Cleanliness Inspection Requirements (Clause 4.2.1 and 4.4.3)
2. Strengthened Decarburization Test Method (Clause 3.3.3.4)
3. Clearly Prohibited Unauthorized Exceptions (Clause 3.6 and 8.5)

Version Comparison Analysis

According to Clause 8.6, the procurement documents shall at least clearly state:

• Pipe size and quantity
• Whether magnetic particle inspection is required (3.4.2)
• Heat treatment condition requirements (3.2)

Chemical Composition	Per Heat	ASTM A751
Grain Size	Periodic Inspection when Contains Refining Elements	ASTM E112
Cleanliness	Periodic testing is possible after passing AMS2301 certification	AMS2301

SAE AMS6360R-2023 Referenced Document

• ASTM A370 Standard Test Methods and Definitions for Mechanical Testing of Steel Products
• ASTM A751 Standard Test Methods, Practices, and Terminology for Chemical Analysis of Steel Products
• ASTM E1 Standard Specification for ASTM Thermometers
• ASTM E1077 Standard Test Methods for Estimating the Depth of Decarburization of Steel Specimens
• ASTM E112 Standard Test Methods for Determining Average Grain Size

SAE AMS6360R-2023 history

• 2023 SAE AMS6360R-2023 Steel Tubing, Seamless, 0.95Cr - 0.20Mo (0.28 - 0.33C) (SAE 4130), Normalized or Stress Relieved
• 2018 SAE AMS6360P-2018 Steel Tubing@ Seamless 0.95Cr - 0.20Mo (0.28 - 0.33C) (SAE 4130) Normalized or Stress Relieved (UNS G41300)
• 2018 SAE AMS6360N-2018 Steel Tubing@ Seamless 0.95Cr - 0.20Mo (0.28 - 0.33C) (SAE 4130) Normalized or Stress Relieved (UNS G41300)
• 2013 SAE AMS6360M-2013 Steel Tubing, Seamless, 0.95Cr - 0.20Mo (0.28 - 0.33C) (SAE 4130), Normalized or Stress Relieved
• 2009 SAE AMS6360L-2009 Steel Tubing, Seamless 0.95Cr - 0.20Mo (0.28 - 0.33C) (SAE 4130) Normalized or Stress Relieved
• 2005 SAE AMS6360L-2005 Steel Tubing, Seamless 0.95Cr - 0.20Mo (0.28 - 0.33C) (SAE 4130) Normalized or Stress Relieved UNS G41300 [Superseded: SAE AMS 6530J]
• 2000 SAE AMS6360K-2000 Steel Tubing, Seamless 0.95Cr 0.20Mo (0.28-0.33C) (SAE 4130) Normalized or Stress Relieved
• 1994 SAE AMS6360-1994 STEEL TUBING (SEAMLESS) Chromium Molybdenum
• 1990 SAE AMS6360J-1990 Steel Tubing@ Seamless 0.95Cr - 0.20Mo (0.28 - 0.33C) (SAE 4130) Normalized or Stress Relieved (UNS G41300)
• 1984 SAE AMS6360H-1984 STEEL TUBING@ SEAMLESS 0.95Cr - 0.20Mo (0.28 - 0.33C) (SAE 4130) Normalized or stress Relieved (UNS G41300)
• 1977 SAE AMS6360G-1977 STEEL TUBING@ SEAMLESS 0.95Cr - 0.20Mo (0.28 - 0.33C) (SAE 4130)
• 1968 SAE AMS6360F-1968 STEEL TUBING@ SEAMLESS 0.95Cr - 0.20Mo (0.28 - 0.33C) (SAE 4130)
• 1966 SAE AMS6360E-1966 STEEL TUBING@ SEAMLESS 0.95Cr - 0.20Mo (0.28 - 0.33C) (SAE 4130)
• 1953 SAE AMS6360D-1953 STEEL TUBING@ SEAMLESS 0.95Cr - 0.2Mo (0.28-0.33C) (SAE 4130)
• 1950 SAE AMS6360C-1950 STEEL TUBING@ SEAMLESS 0.95Cr - 0.20Mo (0.27-0.33C) (SAE 4130)
• 1945 SAE AMS6360B-1945 STEEL TUBING@ (SEAMLESS)@ ROUND .95 Cr .20 Mo (.27-.33C)
• 1942 SAE AMS6360A-1942 STEEL TUBING@ (SEAMLESS)@ ROUND Chromium Molybdenum (.27 - .33 Carbon) (Normalized)

Standard and Specification