Enter certificate values and the applicable minimum or maximum requirements, then compare them in one structured result.
Enter the reported certificate value and the applicable minimum and/or maximum requirement. Leave a limit blank when that side does not apply.
Each entered certificate value is compared with the minimum and maximum limits you provide.
For example, if a specification requires tensile strength of at least 700 MPa and the certificate reports 735 MPa, the value passes that entered minimum requirement.
Chemical composition limits vary by material grade and specification. Common elements that may appear on a metal certificate include carbon, manganese, silicon, phosphorus, sulfur, chromium, nickel and molybdenum.
The calculator does not assume a particular steel grade or specification. Enter the exact limits applicable to the material being reviewed.
Mill test certificates can report properties such as tensile strength, yield strength, elongation, reduction of area, hardness and impact energy. The required property and its limits depend on the material, product form, heat treatment and governing specification.
A property can be evaluated with only a minimum or only a maximum. For example, elongation may have a minimum requirement while some hardness requirements may specify a range.
Before entering a value, check its unit and test basis. A certificate may report different units or testing conditions from the requirement you are comparing against.
Chemistry values are commonly reported as percentages, while tensile and yield strength may be reported in MPa or other units. Hardness can also be reported using different scales.
Make sure the certificate value and requirement are expressed on a comparable basis before evaluating the result.
The heat number provides an important connection between certificate data and the physical material. A numerical comparison is only useful when the certificate data belongs to the material being evaluated.
Compare the heat number on the certificate with the material marking, tag, bundle information or other applicable traceability record.
A numerical comparison does not by itself establish complete material acceptance. Material identity, specification, dimensions, heat treatment, testing requirements, traceability and documentation may also need review.
This tool is intended to make numerical comparison easier. Final acceptance should follow the applicable specification, purchase order and quality procedures.
This calculator compares numbers supplied by the user. It does not authenticate mill certificates, verify laboratories, identify forged documents, determine whether a specification applies, or independently test material.
A blank minimum or maximum is treated as an unentered limit, not as proof that no requirement exists.
What does this mill test certificate comparator do?
It compares reported certificate values with minimum and maximum requirements entered by the user.
Can it compare steel chemistry?
Yes. It supports common alloying and residual elements including carbon, manganese, silicon, phosphorus, sulfur, chromium, nickel and molybdenum.
Can it compare tensile and yield strength?
Yes. Tensile strength, yield strength, elongation, reduction of area, hardness and impact energy are included.
What happens if I enter only a minimum?
The certificate value is checked against the minimum only.
What happens if I enter only a maximum?
The certificate value is checked against the maximum only.
Does a passing result mean the material is fully accepted?
No. It only means the entered numerical values are within the entered limits. Other material and documentation requirements still need review.