Everything You Need To Know About Astm B575 Standard

Introduction to ASTM B575 Standard:

ASTM B575 is a standard specification established by the American Society for Testing and Materials (ASTM) that outlines the requirements for nickel-molybdenum-chromium-iron alloys (UNS N10276, N06022, N10665, and N10675) plate, sheet, and strip.

The following products are covered under this specification:

• Sheet and Strip-Hot or cold rolled, solution annealed, and descaled unless solution anneal is performed in an atmosphere yielding a bright finish.
• Plate-Hot or cold rolled, solution annealed, and descaled.

Included Grades and Chemical Composition:

ASTM B575 covers four grades of nickel-molybdenum-chromium-iron alloys, each with its unique chemical composition:
1. UNS N10276 (Hastelloy C-276, 2.4819): Comprises nickel, molybdenum, chromium, and iron, with additions of tungsten and cobalt.
2. UNS N06022 (Hastelloy C-22, 2.4602): Contains nickel, chromium, molybdenum, and tungsten, with controlled levels of iron and cobalt.
3. UNS N10665 (Hastelloy B-2, 2.4617): Primarily consists of nickel, molybdenum, and iron, with minimal amounts of chromium and tungsten.
4. UNS N10675 (Hastelloy B-3, 2.4600): Comprises nickel, molybdenum, and iron, with additions of chromium, cobalt, and tungsten.

Composition Limits,%

Mechanical Properties:

The mechanical properties of ASTM B575 alloys vary depending on factors such as grade, thickness, and heat treatment. Common mechanical properties include tensile strength, yield strength, elongation, and hardness.

Physical properties Density

ASTM B575 Sizes and Dimensions:

• cold-rolled plate, n-material 3⁄16 to 3⁄8 in. (4.76 to 9.52 mm), inclusive, in thickness.
• hot-rolled plate, n-material 3⁄16 in. (4.76 mm) and over in thickness.
• plate, n-material 3⁄16 in. (4.76 mm) and over in thickness.
• sheet and strip, n-material under 3⁄16 in. (4.76 mm) in thickness.

ASME SB 575 Plate Sheet Strip Production Processes:

The production processes for ASTM B575 materials may include methods such as hot rolling, cold rolling, annealing, and surface treatment to achieve the desired properties and dimensions.

ASTM B575 Quality Testing Methods:

• Chemical Composition Analysis: Performed using techniques like optical emission spectroscopy (OES) or inductively coupled plasma (ICP) analysis to verify alloy composition.
• Mechanical Testing: Involves tensile testing, hardness testing, and impact testing to assess mechanical properties and ensure material integrity.
• Dimensional Inspection: Utilizes instruments like calipers, micrometers, and gauges to verify dimensions and tolerances.
• Non-Destructive Testing (NDT): Includes methods like ultrasonic testing (UT) and radiographic testing (RT) to detect internal defects without compromising the integrity of the material.

Applications:

ASME SB 575 nickel-molybdenum-chromium-iron alloys find applications in various industries, including:

• Chemical processing
• Petrochemicals
• Pharmaceuticals
• Food processing
• Aerospace

Referenced Documents

• B 906 Specification for General Requirements for Flat Rolled Nickel and Nickel Alloys Plate, Sheet, and Strip
• E 112 Test Methods for Determining Average Grain Size
• E 140 Hardness Conversion Tables for Metals Relationship Among Brinell Hardness, Vickers Hardness, Rockwell Hardness, Superficial Hardness, Knoop Hardness, and Scleroscope Hardness
• E 527 Practice for Numbering Metals and Alloys (UNS)

Conclusion:
ASTM B575 standardizes the requirements for nickel-molybdenum-chromium-iron alloys in plate, sheet, and strip forms, ensuring their suitability for a wide range of industrial applications. Compliance with these standards guarantees the quality, reliability, and performance of these materials in demanding environments.