A single “strength” value is insufficient for checking a drawing. BVM explains yield strength and tensile strength to support clearer purchasing discussions.
Two different properties
SSAB relates yield strength to the onset of plastic deformation, beyond which the original shape is not fully recovered. Ultimate tensile strength is the engineering stress at maximum tensile-test load, based on the original cross-sectional area.
The properties are not interchangeable simply because both use MPa.
Identify the property before comparing values
BVM recommends matching the property name on the report to the drawing. Ask engineering to clarify unfamiliar symbols before accepting or rejecting a result.
If an enquiry says only “600 MPa strength”, ask which property, whether it is a minimum or a permitted range, and which delivery condition applies. This number is an illustrative communication example, not a grade acceptance limit.
Connect the result to the material
Check the grade, specification, dimensions, delivery condition, batch identification and stated test conditions together. A generic reference table should not be treated as a guarantee for every size or condition.
For substitute offers, request an explicit comparison and engineering approval. A larger strength value alone should not determine substitution.
A BVM enquiry template is: “Please confirm yield and tensile requirements for the specified grade, dimensions and delivery condition; provide batch-linked mechanical-property documentation and clarify the applicable test method.” Adapt it to the actual order.
Source: SSAB — 20 questions about steel, no publication date displayed; checked 26 October 2026. This conceptual guide does not replace drawings or acceptance standards. Image: AI-created BVM illustration with the authentic logo, not an actual test or batch photograph.
