How to select the right milling grade for Hard Materials?
A mapping of Hard Materials grades and how to select the right one.SMG H (Hard Material) is divided in 8 sub-groups, to capture specific material characteristics and reduce the complexity of every specific material.
Based on grade portfolio, first and second choices are provided for each sub-groups. This is a starting grade recommendation which can be optimized depending on the application, based on below mentioned grade mapping.
SMG | Description | Reference | Calibration | First Choice | Second Choice |
H3 | Case-hardened steels | 16 MnCr 5 | 60 HRC | CBN200 | MH1000* |
H5 | Quenched & Tempered steels | 42 CrMo 4 | 50 HRC | CVD: MP1501 PVD: MK2050 / MH1000* / F15M* | CVD: MP3501 PVD: MP3000 |
H7 | Quenched & Tempered steels, Bearing steels | 100 Cr 6 | 60 HRC | CBN200 | MH1000* |
H8 | Tools steels & High-Speed Steels (HSS) | X 40 CrMoV 5 1 | 50 HRC | CVD: MP1501 PVD: MK2050 / MH1000* / F15M* | CVD: MP3501 PVD: MP3000 |
H11 | Martensitic stainless steels | X 20 Cr 13 | 45 HRC | CVD: MP1501 PVD: MK2050 | CVD: MP3501 PVD: MP3000 |
H12 | Maraged and precipitation-hardened stainless steels | X 5 CrNiCuNb 16 4 | 1450 N/mm² | CVD: MP1501 PVD: MK2050 | CVD: MP2501 PVD: MP3000 |
H21 | Austenitic nodular cast irons | X 120 Mn 12 | 50 HRC | CVD: MP1501 PVD: MK2050 / MH1000* / F15M* | CVD: MP3501 PVD: MP3000 |
H31 | White cast iron | EN-GJN-HV600 (XCr11) | 55 HRC | CVD: MP1501 PVD: PVD: MK2050 / MH1000* / F15M* | CVD: MP3501 PVD: MP3000 |
* Limited range offering
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Carbide P20 / coarse grained
Coating medium thick CVD Ti(C,N) + Al2O3
Color Silver (Used Edge Detection Layer)
SMG P4 – P8 / K1 – K7 / H8 - H21
Coolant Dry
Application You first choice for high performance and productivity under more stable conditions in steel applications. Optimization of MP2501 due to higher wear resistance to also cover higher tensile stress or hardened steels. Excellent grade for wet machining of grey cast iron and especially peak performance in nodular cast iron to support MK2050 or MK1500.
Tougher Grade Option MP2501
Harder Grade Option MK1500
Carbide P30 / medium grain
Coating medium thick CVD Ti(C,N) + Al2O3
Color Silver (Used Edge Detection Layer)
SMG P2 – P8 / M1 – M3 / K1 – K8
Coolant Dry + Wet
Application Your first choice for maximizing manufacturing output when dealing with wide variations in productivity, cutting data and workpiece material requirements. Alternative in stainless steel applications with stable conditions and higher cutting speeds.
Tougher Grade Option MP3501
Harder Grade Option MP1501
Carbide P30 / medium grained
Coating medium thick CVD Ti(C,N) + Al2O3
Color Black
SMG P4 – P12 / M1 – M5 / S1 – S13
Coolant Dry + Wet
Application Grade with a tough CVD coating structure which is beneficial for rough milling of superalloy materials, tool steels as well as high alloyed stainless steels.
Tougher Grade Option MP3501
Harder Grade Option MP2501
Carbide P35 / medium grained
Coating medium CVD Ti(C,N) + Al2O3
Color Silver (Used Edge Detection Layer)
SMG P1 – P12 / M1 – M5 / K4 - K8
Coolant Dry + Wet
Application Your first choice for maximizing manufacturing output when dealing with wide variations in stability, versatility and workpiece material requirements. A versatile and reliable grade ideal for milling in steel, stainless steel and superalloys under both stable and unstable conditions. It is a tougher alternative to MP2501 to overcome issues like edge chipping. Can be applied under dry and wet machining conditions.
Tougher Grade Option MM4500
Harder Grade Option MP2501
Carbide P20 / ultra fine grain
Coating PVD TiAlN/TiN
Color Gold
SMG P1 – P8 / M1 – M3 / H8 – H21 / N1 - N11
Coolant Dry + Wet
Application PVD-coated fine grained grade for fine to medium rough milling as well as finishing purposes. Ideal grade for steel with lower tensile stress and peak performance in hardened steels. PVD-coated version of H25. Optimization in case of too high abrasive wear when machining higher Si content based non-ferrous metals.
Tougher Grade Option MS2050 / F40M
Harder Grade Option MK2050
Carbide P10 / ultra fine grain
Coating PVD TiAlN/TiN
Color Gold
SMG N1 – N11 / K1 – K8 / H8 – H21
Coolant Dry + Wet
Application PVD-coated version of H15. Hard and wear resistant grade for rough milling in aluminum and non-ferrous alloys. Optimization in case of too high abrasive wear when machining higher Si content based non-ferrous metals. Excellent grade, in combination with protected cutting edges, for high speed machining in hardened steel. Ideal for finishing application of cast iron and steel.
Tougher Grade Option MP3000 / F30M / MK2050
Harder Grade Option MH1000
Carbide P20 / medium grain
Coating PVD TiSiN
Color Purplish
SMG P3 – P6 / K1 – K4 / H11 – H21
Coolant Dry + Wet
Application First choice in all cast iron materials especially at smaller diameters. Peak performance in cast iron dry and with coolant as well in higher tensile steels and hardened steels. Grade offers an improved edge integrity and the TiSiN PVD-coating provides a high wear resistance against abrasive wear. Excellent for milling with and without coolant.
Tougher Grade Option MP3000 / MS2050
Harder Grade Option F15M / MH1000
Carbide P05 / ultra fine grain
Coating PVD TiAlN/TiN
Color Gold
SMG P1 – P5 / K1 – K8 / H11 – H21
Coolant Dry + Wet
Application First choice and outstanding performance for hardned steels above 55 HRC. Excellent grade for finishing operations in cast iron and steels. Extremely hard and ultra fine grained grade.
Tougher Grade Option -
Harder Grade Option F15M / MP3000
Inline Content - Survey
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