SEDL / STP / STP706-EB / STP38213S

Development of a Low-Chromium Stainless Steel for Structural Application

Eckenrod, JJ
Supervisor stainless steels and technical director stainless steels, Crucible Research Center, Pittsburgh, Pa.

Kovach, CW
Supervisor stainless steels and technical director stainless steels, Crucible Research Center, Pittsburgh, Pa.

Pages: 18    Published: Jan 1980

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Abstract

A new stainless steel is described which provides a good combination of mechanical properties and corrosion resistance for structural applications where welding is required. Development of this steel was based upon utilizing a 12 percent chromium, 0.85 percent nickel chemical composition which produces a tough, fine-grain size, ferrite-carbide microstructure in the mill-annealed condition. When welded with austenitic filler metal, a martensitic heat-affected zone microstructure is produced which also has good toughness resulting from its low-carbon nickel martensite composition. Data are given illustrating the composition balance and mill processing required to achieve these properties for this steel. The alloy has seen application in cargo container and mass transit vehicle structurals where good toughness, strength and corrosion resistance are required in the base metal and welds.