A preliminary identification resource, not an automatic substitution approval.
State the exact standard designation, edition and required delivery condition.
Review composition, mechanical properties, heat treatment, dimensions and inspection requirements.
Equivalent-looking names do not replace a formal material and order review.
Hengtaifeng's main portfolio includes medium carbon, high carbon, heat-treated high-strength, automotive alloy and stainless steel grades. Send the original drawing or material specification when available.
| Search term | What the evidence supports | What still needs approval |
|---|---|---|
| SK5 / SK4 | Nippon Steel identifies these as former symbols for SK85 / SK95. | Product form, chemistry, condition and order requirements. |
| 65Mn / SAE 1065 | They may be compared as candidate spring/high-carbon steels. | Manganese limits and the full governing standards differ; no automatic substitution. |
| 65Mn / SUP6 | Both may appear in spring-steel searches. | SUP6 is silicon-manganese steel and should not be labelled a direct equivalent. |
Methodology reviewed 2026-08-14. References support identification only, not order certification.
Send the grade, condition, thickness, width, tolerance, quantity and application. Final feasibility is confirmed against the complete specification.