A martensite boundary on the WRC-1992 diagram
- Lincoln Electric Co., Cleveland, OH (United States)
The upper martensite boundary line from the Schaeffler diagram for stainless steel weld metals can be transposed to the WRC-1992 diagram. However, magnetic measurements and longitudinal face bend tests of weld metals do not show good correspondence to this boundary. Many deposit compositions of lower chromium and nickel equivalents than those along Schaeffler`s transposed martensite boundary show no martensite as-deposited and pass a 2T longitudinal face bend test. Based upon magnetic measurements and bend tests of about 100 weld metal compositions, obtained as single-pass submerged arc deposits on ASTM A36 mild steel, a new martensite boundary is proposed for addition to the WRC-1992 diagram. This boundary separates compositions that exhibit no magnetic response attributable to martensite and pass a 2T longitudinal face bend test from compositions that have magnetic response that indicates the presence of as-deposited martensite and fail the bend test. Because manganese is part of neither the chromium equivalent nor the nickel equivalent on the WRC-1992 diagram, the line is specific to the Mn level considered in the tests--approximately 1%--that is suitable for most stainless steel cladding and dissimilar metal joining situations. It is probably conservative for deposits of much higher Mn content.
- OSTI ID:
- 343617
- Journal Information:
- Welding Journal, Vol. 78, Issue 5; Other Information: PBD: May 1999
- Country of Publication:
- United States
- Language:
- English
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