What is ASTM A691?
ASTM A691 is a Specification for Carbon and Alloy Steel Pipe, Electric-Fusion-Welded for High-Pressure Service at High Temperatures.Category
Corrosion-Resisting and Heat-Resisting SteelsScope
This specification covers carbon and alloy steel pipe, electric-fusion-welded with filler metal added, fabricated from pressure-vessel-quality plate of several analyses and strength levels and suitable for high-pressure service at high temperatures.Ok let's start with ASTM A691 chemical composition.
Chemical Composition
Grade 91
C
0.08 - 0.12Mn
0.30 - 0.60P max.
0.020S max.
0.010Si
0.20 - 0.50Cr
8.00 - 9.50Mo
0.85 - 1.05Ni max.
0.40V
0.18 - 0.25Nb
0.06 - 0.10N
0.030 - 0.070Al max.
0.02Tin max.
0.01Zr max.
0.01Learn more about chemical composition.
Now it's the mechanical properties turn:
Tensile Strength
Grade 91
85 - 110 ksi (585 - 760 MPa)Learn more about what is tensile strength.
Elongation (min.) 50 mm
0.18.Learn more about what is elongation.
Reduction of Area (min. %)
Not Required.Learn more about reduction of area.
Hardness Requirements
Grade 91
241 HB max.Learn more about what is hardness.
Allowable Stress
Depends on the project (And its factor of safety).Learn more about the what is allowable stress.
My Material's Rank
While engineers will often look for the cheapest material they can use, I took a different approach to material's selection to help newbie students.I ranked materials according to their yield strengths and ASTM A691 currently ranks 166 in my yield strength index. This means there are other 165 materials that are more resistant.
Note: I've analysed 134 materials in order to create an yield strength index. Check my astm material's comparison post for more details.
Details and PDF
Instructions:
- Go to this page.
- Type the name of the standard you are looking for in the search box. Tip: Don't forget to include "ASTM" as a keyword.
- Read the details about the standard or download the PDF.
ASTM Classroom
Are you having trouble understanding the basics of ASTM?What is the difference between Code, Standard & Specification?
This video will walk you through:
References
Citation
When you need to include a fact or piece of information in an assignment or essay you should also include where and how you found that piece of information.That gives credibility to your paper and it is sometimes required in higher education.
To make your life (and citation) easier just copy & paste the information below into your assignment or essay:
Luz, Gelson. ASTM A691 Properties (Chem., Mech. & Rankings). Materials Blog. Gelsonluz.com. dd mmmm. yyyy. <URL>
Now replace dd, mmmm and yyyy with the day, month, and year you browsed this page. Also replace URL for the actual url of this page (The < and > stay, ok?). This citation format is based on MLA.
Other References
A 20/A 20M Specification for General Requirements forSteel Plates for Pressure Vessels
A 204/A 204M Specification for Pressure Vessel Plates,
Alloy Steel, Molybdenum
A 299/A 299M Specification for Pressure Vessel Plates,
Carbon Steel, Manganese-Silicon
A 370 Test Methods and Definitions for Mechanical Testing
of Steel Products
A 387/A 387M Specification for Pressure Vessel Plates,
Alloy Steel, Chromium-Molybdenum
A 435/A 435M Specification for Straight-Beam Ultrasonic
Examination of Steel Plates
A 530/A 530M Specification for General Requirements
for Specialized Carbon and Alloy Steel Pipe
A 537/A 537M Specification for Pressure Vessel Plates,
Heat-Treated, Carbon-Manganese-Silicon Steel
E 165 Practice for Liquid Penetrant Inspection Method
E 350 Methods for Chemical Analysis of Carbon Steel,
Low-Alloy Steel, Silicon Electrical Steel, Ingot Iron,
and Wrought Iron
E 709 Practice for Magnetic Particle Examination
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