Sumitomo AC610M: the maker lists AC6020M as its successor
Sumitomo Electric puts Sumitomo AC6020M against AC610M in its own catalogue material. We publish the pair only because the maker printed it; the source and page are below.
What the maker's document shows
AC610M → AC6020M · M / stainless steel turning (CVD)
The table has a "Grade" column and an "Old Grades" column. AC6020M is in the Grade column; AC610M is in its Old Grades column.
Source: Sumitomo Electric, General catalogue 2025–2026, coated carbide grade table, printed page A27 (PDF page 27). Open the maker's PDF at that page →
Text line as extracted from the PDF (table columns run together)
AC6020M 90.1 2.3 ABSOTECH 5 · Adopts a high-hardness carbide substrate and new coating to realise excellent wear AC610M
What this does and does not mean
It means the maker positions AC6020M as the newer grade for the work AC610M was used for. It does not say AC610M is discontinued, and it does not say every insert shape and chipbreaker you buy in AC610M exists in AC6020M.
Before you switch:
- Check that your exact insert designation and chipbreaker are offered in AC6020M in the maker's current catalogue.
- Start from the maker's recommended cutting speed for AC6020M, not the numbers you ran with AC610M.
- Run both grades until the edge is worn out on the same part and compare parts per edge. One part is not a result.
Other Sumitomo successor pairs
AC230 → ACP100 · AC304 → AC630M · AC405K → AC4010K · AC420K → AC4125K · AC700G → AC420K · AC8015P → AC8115P · AC810P → AC8015P · AC830P → AC8035P · ACP100 → ACP2000
Tell the advisor your insert, material and operation. It answers brand-neutral, including options from other makers. To check a whole tool list for older grades, use the free coverage check.