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General Requirements of Steel Hardware Specified

Three specifications available from ASTM present general requirements common to the testing, heat treating, and sampling of steel hardware specified in 22 individual ASTM standards for steel fittings, forging, and bolting. (See accompanying list.)

“We had a whole series of standards that had different requirements,” explains Bruce Dingman, manager, Business Development, BWX Technologies, Mt. Vernon, Ind., and chairman of ASTM Committee A01 on Steel, Stainless Steel, and Related Alloys. “Each standard had been developed on its own and the fittings and flanges were tested differently, but the same companies were making products to all of these standards. It was confusing to them as well as to their customers.” It was proposed that all the testing requirements be made at least similar, and each hardware group’s general requirements placed in one standard.”

New in 1999 are:

--A 960, Standard Specification for Common Requirements for Wrought Steel Piping Fittings;

--961, Standard Specification for Common Requirements for Steel Flanges, Forged Fittings, Valves, and Parts for Piping Applications; and

--A 962/A 962M, Standard Specification for Common Requirements for Steel Fasteners or Fastener Materials, or Both, Intended for Use at Any Temperature from Cryogenic to the Creep Range.

The requirements cover ordering information, materials, manufacture, chemical, mechanical, hardness, tensile, impact, rework, finish and appearance, inspection, rejection and rehearing, marking, packaging, and certification. As well as all of those previously named, A 960 and A 961 include requirements for repair by welding; A 962/A 962M also includes melting process, decarburization, and number of tests.

The standard requirements were developed by a task group of metallurgists and engineers in ASTM Subcommittee A01.22 on Steel Forgings and Wrought Fittings for Piping Applications and Bolting Materials for Piping and Special Purpose Applications.

ASTM standards are available by calling Customer Service (610/832-9585), or through the Web site.

Upcoming from Committee A01 are new standards for stainless clad reinforcing bar for use in concrete bridges and other steel applications. Participation or inquiries are welcomed.

For further technical information, contact Bruce Dingman, BWX Technologies, 1400 Old Hwy. 69 South, Mt. Vernon, IN 47620 (812/838-8684; fax: 812/838-1210). Committee A01 meets May 22-25 in Toronto, Ontario, Canada. For meeting or membership details, contact manager George Luciw, ASTM (610/832-9710). //

Copyright 2000, ASTM

A 960, Standard Specification for Common Requirements for Wrought Steel Piping Fittings, defines general requirements for steel hardware specified in:

A 234/A 234M, Specification for Piping Fittings of Wrought Carbon Steel and Alloy Steel for Moderate and Elevated Temperatures;
A 403/A 403M, Specification for Wrought Austenitic Stainless Steel Piping Fittings;
A 420/A 420M, Specification for Piping Fittings of Wrought Carbon Steel and Alloy Steel for Low-Temperature Service;
A 758/A 758M, Specification for Butt-Welding, Wrought-Carbon Steel, Piping Fittings with Improved Notch Toughness;
A 774/A 774M, Specification for As-Welded Wrought Austenitic Stainless Steel Fittings for General Corrosive Service at Low and Moderate Temperatures;
A 815/A 815M, Specification for Wrought Ferritic, Ferritic/Austenitic, and Martensitic Stainless Steel Piping Fittings;
A 858/A 858M, Specification for Heat-Treated Carbon Steel Fittings for Low-Temperature and Corrosive Service; and
A 860/A 860M, Specification for High-Strength Butt-Welding Fittings of Wrought High-Strength Low-Alloy Steel.

A 961, Standard Specification for Common Requirements for Steel Flanges, Forged Fittings, Valves, and Parts for Piping Applications, defines steel hardware specified in:

A 105/A 105M, Forgings, Carbon Steel, for Piping Components;
A 181/ A 181M, Forgings, Carbon Steel, for General-Purpose Piping;
A 182/A 182M, Forged or Rolled Alloy-Steel Pipe Flanges, Forged Fittings, and Valves and Parts for High Temperature Service;
A 350/A 350M, Forgings, Carbon and Low Alloy Steel, Requiring Notch Toughness Testing for Piping Components;
A 694/A 694M, Forgings, Carbon and Alloy Steel, for Pipe Flanges, Fittings, Valves, and Parts for High-Pressure Transmission Service;
A 707/A 707M, Flanges, Forged, Carbon and Alloy Steel for Low Temperature Service;
A 727/A 727M, Forgings, Carbon Steel, for Piping Components with Inherent Notch Toughness;
A 836/A 836M, Forgings, Titanium-Stabilized Carbon Steel, for Glass-Lined Piping and Pressure Vessel Service.

A 962/A 962M, Standard Specification for Common Requirements for Steel Fasteners or Fastener Materials, or Both, Intended for Use at Any Temperature from Cryogenic to the Creep Range, defines steel hardware specified in:

A 193/A 193M, Alloy-Steel and Stainless Steel Bolting Materials for High-Temperature Service;
A 194/A 194M, Carbon and Alloy Steel Nuts for Bolts for High Pressure and High-Temperature Service;
A 320/A 320M, Alloy Steel Bolting Materials for
Low-Temperature Service;
A 437/A 437M, Alloy-Steel Turbine-Type Bolting
Material Specially Heat Treated for High
Temperature Service;
A 453/A 453M, High-Temperature Bolting Materials with Expansion Coefficients Comparable to Austenitic Stainless Steels; and
A 540/A 540M, Alloy-Steel Bolting Materials for Special Applications.