There is a possibility that AISI grades
are quoted as SAE grades and very often the same steel identification number is present in AISI/SAE standards. A four-digit number is usually given to the AISI alloy steels and carbon steels.
What is an AISI number?
Definitions. The four-digit identification number used to designate carbon steel coils. AISI stands for the American Iron and Steel Institute. The first two digits in the AISI number indicate the grade of steel, while the last two digits give the amount of carbon in the steel.
What does AISI stand for?
Back in the 1930s and 1940s, the standards organization SAE International and the American Iron and Steel Institute (AISI) began working to standardize a numbering system for stainless steel.
What does SAE mean in steel?
The Society of Automotive Engineers (SAE) designates SAE steel grades. These are four digit numbers which represent chemical composition standards for steel specifications. The American Iron and Steel Institute (AISI) originally started a very similar system.
What is AISI in engineering?
AISI – American Iron and Steel Institute.
What is the difference between AISI and ASTM?
The AISI stands for the American Iron and Steel Institute. While both these agencies produce and maintain standards for metallic materials and products, the AISI is more specific on iron steel while the ASTM has a larger area of coverage for materials such as petroleum, rubber and more.
What is SAE material?
The SAE steel grades system is a standard alloy numbering system (SAE J1086 – Numbering Metals and Alloys) for steel grades maintained by SAE International. In the 1930s and 1940s, the American Iron and Steel Institute (AISI) and SAE were both involved in efforts to standardize such a numbering system for steels.
Is AISI 304 stainless steel?
AISI 304 (1.4301) is a widely-used austenitic chromium-nickel stainless steel. It has excellent drawing properties and very good formability, while it is also highly corrosion-resistant. Typical uses of 304 stainless steel include sinks, kitchen equipment such as pans, tubing and much more.
What is AISI 4140 ASTM equivalent?
AISI 4140 Steel / 42CrMo4 steel is a Alloy Structural Steel belong to ASTM A29/A29M Steel Grade standard.
What does AISI 1018 mean?
AISI 1018 is a Standard grade Carbon Steel. It is composed of (in weight percentage) 0.15-0.20% Carbon (C), 0.60-0.90% Manganese (Mn), 0.04%(max) Phosphorus (P), 0.05%(max) Sulfur (S), and the base metal Iron (Fe). Other designations of AISI 1018 carbon steel include UNS G10180 and AISI 1018.
What does the second number in the AISI SAE designation of a metal stand for?
The second digit of the series indicates the concentration of the major element in percentiles (1 equals 1%). The last two digits of the series indicate the carbon concentration to 0.01%. For Example : SAE 1018 indicates non-modified carbon steel containing 0.18% of carbon.
What is SAE grade bolts?
SAE Bolt Grades—The standards for bolt strength grades in the U.S. are set according to a system developed by the SAE (Society of Automotive Engineers). The SAE marking system uses raised dashes on the bolt head to indicate strength.
What property does the AISI SAE tool steel grade L possess?
8. What property does the AISI-SAE tool steel grade ‘L’ possess? Explanation: The steel grade ‘L’ refers to special purpose steel containing low alloy. It consists of elements such as carbon, chromium, manganese, and a few others.
What does the third and fourth digits of the SAE AISI classification mean?
The SAE-AISI system then classifies all other alloy steels using the same four digit index as follows: 2 – Nickel steels; 3 – Nickel-chromium steels; 4 – Molybdenum steels; 5 – Chromium steels; 6 – Chromium-vanadium steels; 7 – Tungsten-chromium steels; 9 – Silicon-manganese steels.
Why do some steels have five digit names?
A four-digit number series designates carbon and alloying steels according to the types and classes. This system has been expanded, and in some cases five digits are used to designate certain alloy steels.
References:
- https://www.thefabricator.com/glossary/aisi-number
- https://www.gpss.com/understanding-steel-naming-numbering-system/
- http://li.mit.edu/Stuff/PM/SAE-Steel-Grades.pdf
- https://www.engineeringtoolbox.com/aisi-sae-steel-numbering-system-d_1449.html
- https://www.nickelalloysonline.co.in/blog/difference-between-aisi-and-astm.html
- https://en.wikipedia.org/wiki/SAE_steel_grades
- https://matmatch.com/learn/material/aisi-304-stainless-steel
- https://www.otaisteel.com/aisi-4140-steel-42crmo4-scm440/
- https://www.efunda.com/glossary/materials/alloys/materials–alloys–steel–carbon_steel–aisi_1018.cfm
- https://www.theprocesspiping.com/introduction-sae-aisi-steel-numbering-system/
- https://www.homedepot.com/c/ab/grades-of-bolts/9ba683603be9fa5395fab90189731df8
- https://www.sanfoundry.com/engineering-materials-metallurgy-questions-answers-stainless-steels-other-steels/
- https://hastingsmachine.com/wp-content/uploads/2014/04/SAE-Steel-Properties-Designation-System.pdf
- https://www.sciencedirect.com/topics/agricultural-and-biological-sciences/stainless-steel