Carbon & alloy steel
AISI 52100
Manufacturer or standards-body identification; product values do not apply to every form or condition.
Identity / state reference
What distinguishes this material
Metallus grade-specific chemistry: The 52100 row gives C 0.93–1.05% and Cr 1.35–1.60%; E52100 has a separate row and must not silently replace it.
- Designation in this reference
- SAE 52100
- Forms covered by the sources
- Product form is not established by the Metallus chemistry table; obtain the supplier product specification.
- States to distinguish or confirm
- The chemistry designation does not establish a heat-treatment condition.
- Temperature and exposure
- No universal service-temperature limit or room-temperature property set is assigned. Use the cited product document and the purchase certificate.
Property evidence for a stated condition
No condition-specific numerical table is reproduced here
The linked sources establish the identity and the stated product/state scope. Obtain the row for your actual form, section, treatment and test conditions before adopting strength, hardness or a thermal limit.
Metallus Practical Data for Metallurgists, 19th edition (2024) ↗
Resolve these conditions next
- What product standard, edition and complete grade are on the material certificate?
- What product form, section size and delivery/heat-treatment condition will be machined?
For machining, take the exact grade, supplied condition and measured hardness where applicable into the tool maker’s application data. A generic material-family speed is not a substitute for an operation and tool-specific recommendation.
Sources and what they establish
Reviewed 23 October 2026. A source’s publication date and the review date are different. The scope below identifies the fields checked.
Metallus Practical Data for Metallurgists, 19th edition (2024)
Grade chemistry tables, printed pp. 4–7, visually checked; supports chemistry identity, not a universal mechanical-property or delivery-condition table.
Metallus Practical Data for Metallurgists, 19th edition (2024) ↗Source identity, a named product example and a supplied-batch certificate are different evidence. Cross-standard similarity does not approve substitution.
Corrections from the previous article
- Separate 52100 from the handbook E52100 row; remove automatic bearing-grade cleanliness and universal spheroidized-anneal claims.
- Withdraw the legacy generic hardness (190–230 HB (spheroidised)) and tensile-strength (2,000 MPa (290 ksi) hardened) pair: the old page does not establish a matching product, heat treatment, section and test source.
- Remove the unsupported cutting-speed table and machinability percentage; select tooling only after the actual material condition is known.
Other references in Carbon & alloy steel
Related references, not equivalent substitutes.