About Alloys / Special Metals

 Alloys Special Metals : 

Alloys Special Metals : An alloy is a mixture or metallic solid solution composed of two or more elements.[1] Complete solid solution alloys give single solid phase microstructure, while partial solutions give two or more phases that may or may not be homogeneous in distribution, depending on thermal history. Alloys usually have different properties from those of the component elements.

Examples include materials such as solder, brass, pewter, phosphor bronze and amalgam.

Alloy constituents are usually measured by mass. Alloys are usually classified as substitutional or interstitial alloys, depending on the atomic arrangement that forms the alloy. They can be further classified as homogeneous , or heterogeneous (consisting of two or more phases) or intermetallic .

Designates all alloys and metals produced at USSM other than stainless steels and precipitation hardenable stainless steels. Categories of special metals would include nickel, nickel base alloys, cobalt base alloys, titanium and titanium base alloys, glass sealing alloys (iron-nickel), etc.

 Alloys / Special Metals :-  

Specification: Alloy steel forgings to ASTM A 182, F5 (5Cr-0.5Mo), F9 (9Cr-1Mo), F11 Class 2 (1.25Cr-0.5Mo) and F22 Class 3 (2.25Cr-1Mo), and stainless steel forgings to ASTM A 182, Grades F304, F304H, F304L, F316, F321, F321H, F347, F44, F50-F55, F57-F61, F62 and F65-F67.

SHELL STANDARDS

Flanges to ASME B16.5
MESC SPE 76/100
Flanges to ASME B16.47
MESC SPE 76/101

AMERICAN STANDARDS

Pipe Flanges and Flanged Fittings NPS 1/2 Through NPS 24 Metric/Inch Standard
ASME B16.5
Large Diameter Steel Flanges NPS 26 Through NPS 60
ASME B16.47
ASME Boiler and Pressure Vessel Code – Rules for construction of pressure vessels
ASME VIII

Standard Specification for Forged or Rolled Alloy and Stainless Steel Pipe Flanges, Forged Fittings, and Valves and Parts for High-Temperature Service
ASTM A 182:2012
Standard Test Methods for Detecting Detrimental Intermetallic Phase in Duplex Austenitic/Ferritic Stainless Steels
ASTM A 923
Standard Specification for Common Requirements for Steel Flanges, Forged Fittings, Valves, and Parts for Piping Applications
ASTM A 961
Standard Test Methods for Determining Average Grain Size
ASTM E 112
Standard Test Method for Determining Volume Fraction by Systematic Manual Point Count
ASTM E 562
Standard Practice for Making and Using C-Ring Stress-Corrosion Test Specimens
ASTM G 38
Standard Practice for Preparation and Use of Bent-Beam Stress-Corrosion Test Specimens
ASTM G 39
Standard Test Methods for Pitting and Crevice Corrosion Resistance of Stainless Steels and Related Alloys by Use of Ferric Chloride Solution
ASTM G 48

Petroleum and natural gas industries — Materials for use in H2S-containing environments in oil and gas production — Part 3: Cracking-resistant CRAs (corrosion-resistant alloys) and other alloys - Second Edition
ISO 15156-3

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