Direct answer: Hengtaifeng supplies and processes hardened and tempered steel strip after reviewing the complete technical specification. The heat-treatment stage is performed in-house, followed by order-specific leveling, slitting, inspection and packaging where applicable. Grade, hardness or other property target, test method, dimensions, flatness, edge and surface must be agreed before supply.
Not every grade, dimension or target condition is available in hardened-and-tempered form. Final feasibility and acceptance criteria are confirmed against the governing standard, drawing and purchase specification.
Hardened and Tempered vs Annealed Strip
| Decision point | Annealed strip | Hardened and tempered strip |
|---|---|---|
| Delivery condition | Softer condition selected for an agreed forming or downstream route | Heat-treated condition supplied to agreed property and dimensional criteria |
| Buyer must define | Grade, microstructure or hardness criteria where required, dimensions and surface | Grade, target property, test method, dimensions, flatness, surface and edge |
| Downstream work | May include forming and later heat treatment | Permissible forming and finished-part validation must be reviewed |
| Substitution | Never substitute by condition name alone; compare the complete specifications and obtain engineering approval. | |
Candidate Material Families
Candidate grades may include specified high-carbon or spring-steel families such as SK5/SK85, SK4/SK95 and 65Mn. These names do not establish automatic equivalence, availability or a universal property range. Hengtaifeng reviews the applicable standard, chemistry, starting condition, section and end-use requirements before confirming a route.
Order-Specific Processing Route
Process parameters are grade-, dimension- and equipment-specific. The purchase order should define acceptance results, not prescribe a generic cycle copied from an unrelated application.
Hardened and Tempered Strip RFQ Checklist
| RFQ field | What to state |
|---|---|
| Grade and standard | Exact designation, governing standard and edition; attach a drawing or specification where available |
| Delivery condition | Hardened and tempered, including any agreed microstructure or process-related acceptance requirement |
| Target property | Hardness or mechanical-property range, scale, test method, sampling position and frequency |
| Dimensions | Thickness, width, tolerances, coil ID/OD or cut length |
| Geometry | Flatness, camber, burr and edge condition requirements |
| Surface | Functional surface requirement and any appearance acceptance criteria |
| Commercial scope | Quantity, packaging, destination, application and required documents |
Inspection and Acceptance
A hardness value is incomplete without its scale, test method, sample preparation and acceptance range. Dimensional and visual requirements should likewise state the method and sampling plan. Where Rockwell testing applies, ISO 6508-1:2023 is an international test-method reference; the governing product standard may add further requirements.
Frequently Asked Questions
What is hardened and tempered steel strip?
It is steel strip supplied after a hardening and tempering route to an agreed delivery condition. The grade, target property, test method, dimensions, flatness, edge and surface still need to be stated in the order.
Can every grade and size be supplied hardened and tempered?
No. Feasibility depends on the grade, starting material, section, target condition, dimensions, tolerance and processing route. Hengtaifeng confirms the available scope after technical review.
What should the RFQ include?
State the governing grade and standard, delivery condition, target property and test method, dimensions and tolerances, surface, edge, flatness or camber limit, quantity, destination and application.
Related Technical Pages
Read the steel strip heat-treatment buyer's guide, compare SK4 vs SK5 steel strip, review 65Mn spring steel strip, or use the precision strip RFQ checklist.