Mitsubishi CCMT09T304 US735 Carbide Turning Insert for Stainless Steel Machining with High Heat Resistance and Positive Rake Angle

The MITSUBISHI CCMT09T304 US735 is an original Japanese coated cemented carbide positive rake turning insert, belonging to Mitsubishi’s US series dedicated grade for stainless steel and heat-resistant superalloy machining. This 80° rhombus (C-type) single-sided insert features standard MCS general-purpose chipbreaker geometry, 0.4mm nose radius, 7° positive back relief angle, and multi-layer high-temperature resistant CVD coating US735. It delivers excellent anti-work-hardening, anti-adhesion and thermal wear resistance during medium & low-speed stable turning, suitable for external turning, internal boring and finish semi-finishing on 304/316 stainless steel, nickel-based superalloy and titanium alloy. It perfectly matches SCLCR/SCLCN series C-type lathe tool holders for CNC lathe mass precision production.

• Brand: MITSUBISHI MATERIALS (Japan top cutting tool carbide manufacturer)
• Full ISO Model Code: CCMT09T304 US735
• ANSI Equivalent Model: CCMT32.51 US735
• Insert Shape: 80° Rhombus C-type, single-sided 2 usable cutting edges
• Inscribed Circle IC: 9.525 mm (3/8")
• Insert Thickness S: 3.97 mm (T3 specification)
• Corner Radius RE: 0.4 mm
• Back Relief Angle AN: 7° Positive rake
• Chipbreaker Type: MCS standard universal chip control groove
• Coating Grade: US735 exclusive CVD multi-layer composite coating (golden surface finish)
• Substrate Grade: Tough hard alloy substrate for interrupted & unstable cutting
• Core Application Target: Stainless steel, nickel-based superalloy, titanium alloy
• Compatible Tool Holder: SCLCR, SCLCN external turning & boring tool holders
• Standard Packing Quantity: 10 pieces per original yellow Mitsubishi plastic compartment box
• Origin: Made in Japan

• Austenitic stainless steel: SUS304, SUS316, duplex stainless steel
• Heat-resistant superalloy: Inconel, Hastelloy nickel-based alloy
• Titanium alloy, high-strength alloy steel
• Mild carbon steel, gray cast iron (secondary universal processing)

• External diameter semi-finish & finish turning of stainless steel auto fittings, hydraulic pipe joints
• Small precision internal hole boring on medical stainless steel components
• Nickel alloy & titanium alloy aviation miniature part stable low-speed turning
• Mold auxiliary stainless steel insert, fixture batch CNC lathe production
• Unstable clamping interrupted cutting scenarios with strict anti-chipping requirements
• Mass production demanding long tool life and consistent surface finish on sticky hard-to-cut materials

• Exclusive US735 CVD multi-layer coating: Optimized for stainless steel & superalloy, effectively suppress built-up edge and workpiece work-hardening, reduce tool wear rate significantly compared with general PVD coated inserts
• 7° positive rake angle design: Low cutting resistance, lower spindle load and cutting chatter, greatly improves surface roughness of sticky stainless steel parts
• MCS balanced chipbreaker geometry: Curled short chips avoid chip winding around workpiece or tool holder, stable chip evacuation for both external turning and internal boring
• Tough shock-resistant carbide substrate: Excellent edge toughness to resist chipping during interrupted unstable cutting, extends service life in discontinuous machining
• Single-sided 2-edge structure: Cost-effective compared to double-sided inserts, easy to replace after edge wear for small batch flexible production
• Standard universal 09 size dimension: Fully interchangeable with global standard SCLCR09 tool holders, convenient global spare part stocking for foreign trade customers