An overview of bar and seamless tubular microalloyed steels for structural application

Conference · Sun Dec 31 04:00:00 EST 1995

OSTI ID:234242

Aloi, Jr, N E; Luksa, J E ^[1]

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1. Timken Co., Canton, OH (United States)

Medium-carbon (0.15 to 0.40 wt.% C) vanadium microalloyed steels produced as large-diameter bar and seamless tubular long products have been successfully applied to structural applications. Microalloyed steels such as WMA-65 and WMA-80 are designed to replace either quenched-and-tempered or hot-rolled carbon steels. Incentives for converting to microalloyed steels include reduced material and processing costs or allowance for smaller, lighter components through increased strength realized through microalloying. Structural steels that require good weldability are restricted to lower carbon and alloy levels and thus are excellent candidates for microalloyed steels. Processing of high-strength vanadium-carbonitride precipitation-strengthened ferrite/pearlite microalloyed steel long products includes controlling bar rolling of sizes from 50 mm (2 in.) to 305 mm (12 in.) OD, or tube piercing of sizes from 38 mm (1.5 in.) to 320 mm (12.5 in.) OD, and air cooling at the steel mill. Bar products may be subsequently forged where controlled processing must also be performed to meet the desired properties. Both bar and tubing products are described. Chemical composition, mechanical properties, and weldability of the processed microalloyed steels are also discussed.

• OSTI ID: 234242
• Report Number(s): CONF-951026--; ISBN 0-87170-555-9
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
DATA
LOW ALLOY STEELS
MECHANICAL PROPERTIES
MICROSTRUCTURE
PROCESSING
USES
VANADIUM ADDITIONS
WELDABILITY