SAE AMS6459G-2023
Steel, Welding Wire, 1.0Cr - 1.0Mo - 0.12V (0.18 - 0.23C), Vacuum Melted, Environment Controlled Packaging
- Standard No.
- SAE AMS6459G-2023
- Release Date
- 2023
- Published By
- Society of Automotive Engineers (SAE) US / SAE
- Latest
- SAE AMS6459G-2023
- Introduction
Standard Overview and Technology Evolution
AMS6459G is the latest revision released by SAE International in December 2023, replacing AMS6459F, which was confirmed in 2007. This specification targets low-alloy steel welding wire with a composition of 1.0Cr-1.0Mo-0.12V (0.18-0.23C), corresponding to the UNS K22720 alloy system, and is primarily used in critical weld joints in the aviation industry.
Core Chemical Composition Requirements
Element Minimum Value(%) Maximum Value(%) Test Method Carbon (C) 0.18 0.23 ASTM A751 Chromium (Cr) 0.80 1.20 Molybdenum (Mo) 0.80 1.20 Vanadium (V) 0.08 0.15 Regular finished product testing Hydrogen (H) - 0.0010 ASTM D2650 Main updates to the 2023 edition: Strengthening the control of interstitial elements such as oxygen (≤100ppm), nitrogen (≤50ppm), and hydrogen (≤10ppm), requiring periodic gas element testing of finished steel wire.
Critical Control Points of Manufacturing Process
- Melting Process: Vacuum Induction Melting (VIM) or Vacuum Arc Remelting (VAR) must be used
- Processing: Intermediate annealing must be carried out in vacuum or protective atmosphere
- Surface Treatment: The final surface is a cold-worked bright surface to ensure smooth welding wire feeding
Typical Application Case
The steel wire was used for GTAW welding of the high-pressure casing of an aircraft engine. After post-weld heat treatment, the strength of the weld joint reached 98% of the parent material, meeting the requirements of AMS6415 for base material.
Quality Assurance System
Test Type Test Item Implementation Standard Frequency Acceptance Test Chemical Composition/Dimensions AMS2259 Per Heat/Batch Periodic Test Weldability ARP1876 Manufacturer Specific Special Test Alloy Verification ARP4926 Per Reel/Pack Packaging and labeling requirements: AMS2814 high-quality packaging methods must be used, and 203mm of length must be retained at both ends of each coil of steel wire for alloy verification.
Implementation recommendations
- The AMS6459G version number should be clearly marked during procurement to avoid using old inventory materials.
- For critical load-bearing welds, it is recommended to add a special test for hydrogen content.
- The casting characteristics of the steel wire (see the helicity requirements specified in Table 2) should be considered during welding procedure qualification.
SAE AMS6459G-2023 Referenced Document
- ASTM A751 Standard Test Methods, Practices, and Terminology for Chemical Analysis of Steel Products
- ASTM D2650 Standard Test Method for Chemical Composition of Gases By Mass Spectrometry
SAE AMS6459G-2023 history
- 2023 SAE AMS6459G-2023 Steel, Welding Wire, 1.0Cr - 1.0Mo - 0.12V (0.18 - 0.23C), Vacuum Melted, Environment Controlled Packaging
- 2018 SAE AMS6459F-2018 Steel@ Welding Wire 1.0Cr - 1.0Mo - 0.12V (0.18 - 0.23C) Vacuum Melted (UNS K22720)
- 2012 SAE AMS6459E-2012 Steel, Welding Wire 1.0Cr 1.0Mo 0.12V (0.18 - 0.23C) Vacuum Melted
- 2007 SAE AMS6459D-2007 Steel, Welding Wire 1.0Cr - 1.0Mo - 0.12V (0.18 - 0.23C) Vacuum Melted
- 2002 SAE AMS6459D-2002 Steel, Welding Wire 1.0Cr - 1.0Mo - 0.12V (0.18 - 0.23C) Vacuum Melted UNS K22720
- 1996 SAE AMS6459C-1996 Steel, Welding Wire 1.0Cr 1.0Mo 0.12V (0.18 - 0.23C) Vacuum Melted
- 1995 SAE AMS6459B-1995 WIRE, STEEL WELDING 1.0Cr - 1.0Mo - 0.12V (0.18 - 0.23C) Vacuum Induction Melted
- 1991 SAE AMS6459B-1991 Wire@ Steel Welding 1.0Cr - 1.0Mo - 0.12V (0.18 - 0.23C) Vacuum Induction Melted (UNS K22720)
- 1985 SAE AMS6459A-1985 Steel Welding Wire 1.0Cr - 1.0Mo - 0.12V (0.18 - 0.23C) Vacuum Induction Melted
- 1982 SAE AMS6459-1982 Steel Welding Wire 1.0Cr - 1.0Mo - 0.12V (0.18 - 0.23C) Vacuum Induction Melted
