Introduction: AISI 52100, GCr15, SUJ2, and 100Cr6 are four grade names commonly shown together for bearing chrome steel balls. The product description groups them as one high-carbon chromium steel material family, while each designation reflects a different regional or market convention. AISI 52100 is a common US expression, GCr15 is widely used in Chinese standards, SUJ2 is common in Japanese standards, and 100Cr6 is one common European expression.
A grade name identifies material terminology, but it does not replace the rest of the product specification. Diameter, precision, hardness, surface condition, quantity, and packaging remain separate fields. The referenced solid bearing chrome steel balls are listed for precision ball bearing systems and industrial assembly, with a diameter range of 9. 0mm-15. 875mm, G40 precision, HRC60-66 hardness, and a Grinding surface.
AISI 52100, GCr15, SUJ2, and 100Cr6 appear in technical documents, catalogs, and commercial quotations from different markets. A US drawing may specify AISI 52100 bearing steel balls, while a Chinese quotation may use GCr15, a Japanese document may use SUJ2, and a European document may use 100Cr6. These naming conventions explain why several grade names can describe the same broad type of bearing chrome steel ball. The product description presents the four designations together as a high-carbon chromium steel material family. eFunda provides background on AISI 52100 as a bearing steel designation, while the product listing supplies the commercial mapping among the four names. The designation used for a specific order should match the supplier's material documentation and batch identification. The material name also answers a different question from the other product fields. G40 is the listed precision grade, HRC60-66 is the listed hardness range, Grinding identifies the listed surface condition, and 9. 0mm-15. 875mm identifies the available size range. Keeping these fields separate prevents a material designation from being treated as a complete bearing steel ball specification. This distinction matters when documents cross borders. Engineering may release a drawing with AISI 52100, purchasing may receive a quotation using GCr15, and a distributor may list SUJ2 or 100Cr6. Retaining the primary designation together with the alternate terminology allows the documents to be compared without silently changing the requested material wording.
A multi-name description is useful for product identification, while an order needs traceable wording. An inquiry can select one primary designation and identify the other terms as supplier cross-references:
> Solid bearing chrome steel balls, primary material designation: AISI 52100. The supplier description also references GCr15, SUJ2, and 100Cr6. Please state the material designation used for the quoted batch.
When component-level material evidence is required, request the material certificate, batch or heat identification, and grade designation shown in the production records. The relationship among the names should appear in the quotation or order correspondence so a later reviewer can understand why different documents use different terms. Product identifiers can be attached to this record. The referenced item uses product number No. 1600456303920 and model cd1358. It is listed as a solid ball with cardboard box and pallet packaging, and the sales unit is a multiple of 20. These identifiers help connect the material wording with the intended product and prevent confusion with another size or product family.
A clear inquiry places the designation required by the drawing, internal standard, or application record first. Alternate names can follow in parentheses or in a separate terminology field. This gives the supplier useful context without making four names appear to be four independently selected materials. A concise inquiry can use wording such as:
> AISI 52100 solid bearing chrome steel balls, also referenced as GCr15/SUJ2/100Cr6; diameter 9. 0mm-15. 875mm; G40; HRC60-66; Grinding surface.
A purchase order can use a more controlled format:
> Material designation: AISI 52100. Alternate designations referenced in the quotation: GCr15, SUJ2, 100Cr6. Supplier to identify the designation used on the material documentation for the supplied batch.
The material wording should sit beside the physical specification. State the requested diameter within the 9. 0mm-15. 875mm range, G40 precision, HRC60-66 hardness, Grinding surface, quantity, and packaging requirement. Because the listed range is not divided into separate diameter SKUs, an inquiry covering several sizes should state each requested diameter separately. Product identifiers are useful when similar specifications are being reviewed. The product is identified by No. 1600456303920 and model cd1358. Including these references in the inquiry, quotation review, and sample discussion helps engineering, purchasing, and the supplier refer to the same item. Material grades should remain separate from commercial marks, trademarks, quality certificates, and regulatory terms. A trademark identifies a commercial source or sign; it does not define the steel grade. WIPO provides general background for this distinction. Likewise, the listed terms “ISO RoHS” and “DIN AISI GB” should be connected to the specific certificate or standard reference requested for the order. The product is listed for precision ball bearing systems, industrial assembly, bearing production, maintenance inventory, and distributor inventory. These applications often move the same terminology from a design document to a production record and then to a stock or replenishment record. Keeping one primary designation throughout that chain improves document matching and reduces ambiguity.
A useful document request connects the material designation, physical product, shipment or batch, and purchase wording. Ask the supplier to state which designation applies to the quoted product, identify the alternate names used in its literature, and link the response to the batch or heat number. When a quotation uses GCr15 and an internal drawing uses AISI 52100, request a written statement of the relationship for that supply. When a customer uses 100Cr6 or SUJ2, retain those terms as cross-references rather than replacing the primary requirement without approval. This creates a readable record for engineering review, incoming inspection, and future replenishment. Confirm the physical specification at the same time: the requested diameter within 9. 0mm-15. 875mm, G40 precision, HRC60-66 hardness, and Grinding surface. Confirm the quantity using the stated multiple-of-20 sales unit and ask the supplier to identify the packaging for the shipment. The listed packaging is cardboard box plus pallet, with a package size of 31 × 21 × 12 cm and a stated total weight of 20. 500 kg. For mixed diameters, request a separate quotation line and packing reference for each size. Company-level standards and product-level documents should be recorded separately. Kangda Steel Ball Co. , Ltd. states that its business follows GB/T308. 1-2013, but the specific product information does not directly associate that standard number with this product. A purchase record should therefore identify the document or standard that applies to the quoted batch instead of transferring a company statement into a product certificate field. The same approach applies to G40 and HRC60-66. These are the values listed for the product. A technical file requiring batch evidence should request the relevant inspection record and the method or document reference used by the supplier. Attach product number No. 1600456303920 and model cd1358 to keep the response tied to the requested bearing chrome steel balls. For technical clarification or a bulk quotation, use the [contact form](https://kangdasteelball. com/pages/contact-us), the website's Get a quote route, email, telephone, or WhatsApp. Include the primary grade name, alternate names, diameter, G40 precision, hardness, surface, quantity, and required documentation. This gives the supplier a precise basis for confirming the material terminology and supporting records.
AISI 52100, GCr15, SUJ2, and 100Cr6 are regional or market expressions grouped in the product description as one high-carbon chromium bearing steel material family. The clearest purchasing practice is to select one primary designation, retain the alternate names as cross-references, and connect the wording to supplier documentation for the supplied batch. For the referenced product, include the 9. 0mm-15. 875mm diameter range, G40 precision, HRC60-66 hardness, Grinding surface, product number No. 1600456303920, and model cd1358 in a quote request. Use the contact form or Get a quote route to confirm the designation and supporting documents.
Q：What does AISI 52100 mean on a bearing steel ball specification?
A：AISI 52100 is a US material designation for a high-carbon chromium bearing steel. On a bearing steel ball specification, it identifies the steel grade terminology, while diameter, precision, hardness, and surface are separate product fields. The referenced product description places AISI 52100 alongside GCr15, SUJ2, and 100Cr6 and identifies the product as a solid bearing chrome steel ball.
Q：Are GCr15, SUJ2, and 100Cr6 the same as AISI 52100?
A：The product description groups GCr15, SUJ2, 100Cr6, and AISI 52100 as one high-carbon chromium bearing steel material family. GCr15 is common in Chinese standards, SUJ2 is common in Japanese standards, and 100Cr6 is one common European expression. For an order requiring traceable material identification, the supplier should state the designation used for the supplied batch and document its relationship to the other names.
Q：What should I confirm with a supplier when a product lists multiple bearing steel grades?
A：Confirm the primary material designation, alternate grade names, and the batch or heat reference connecting the wording to the supplied goods. Also state the required diameter, G40 precision, HRC60-66 hardness, Grinding surface, quantity, packaging, and material or inspection documents. Product number No. 1600456303920 and model cd1358 can help identify the requested item.
Properties of Alloy Steels Details | eFunda
9.0mm-15.875mm G40 AISI 52100/GCr15/SUJ2/100Cr6 Bearing Chrome Steel Balls
