We are AISI M4 High Speed Tool Steel main Chinese suppliers, wholesale, distributors and stockholder. And M4 hss steel is a molybdenum high speed steel. We supply in hss steel Round bar, gauge plate steel, pipe / Tube,rod, square, hexagonal, blanks, plate, sheet, precision ground flat bar, precision ground bar stock and hollow bar. Provide black surface and black surface alloy steel material.

AISI M4 is a American high speed alloy steel material grade.it is shock resisting steel. What’s more, it belong to ASTM A600-1999 standard. UNS Metal Steel Grade T11304, It is a High Speed steel. ASTM M4 is a molybdenum intermediate type high speed steel, after quenching, surface hardness is 64 HRC min. Used for high speed cutting tool, machine tool automation, for cutting high strength material.

Moreover, Our Tool Steel material 100 % ultrasonic tested with good price. Small size steel products make by hot rolled, large size steel products make by forging.

SAE/AISI M4 Steel material properties datenblatt as below:  AISI M4 HSS Data PDF DOWN

Chemical composition data of Metal UNS T11304 M4 tool steel-ASTM A600-1999

C Si Mn P S Cr Mo V W Co
1.25～1.40 0.20～0.45 0.15～0.40 0.030 max 0.030 max  3.75～4.75  4.25～5.50 3.75～4.55 5.25~6.65 —

Material equivalent of UNS T11304 | AISI M4 steel

USA Germany China Japan France England Italy ISO Czechia Austria Sweden Spain
AISI/SAE/UNS/ASTM DIN,WNr GB JIS AFNOR BS UNI ISO CSN ONORM SS UNE
M4 /UNS T11304/A600

Physical properties of HSS UNS T11304 | M4 Tool Steel

  • Density: 8.9kg/M3
  • Thermal conductivity:
  • Forging ratio: 5:1 Minimum
  • Microstructure:
  • Magnetic:

Mechanical properties of Alloy Steel UNS T11304 | M4 High Speed Tool Steel

Hardness： Annealing: 248 HB max, Q+T: 64 HRc Min, different hardness according different Tempering temperature.

  • Yield strength:

Heat treatment of AISI M4 tool steel

  • Annealing: Annealing temperature/℃: 750~790; After the annealing, degree of hardness ≤HBS: 255. After Cold Drawn 269 HBS Max
  • Quenching: Hardening temperature/℃: 1204, Quenching in Salt bath furnace
  • Tempering: Commonly used drawing temperature/℃:552; After tempering hardness HRC : 64 HRc Min
  • Normalizing：at Normalizing temperature, then cool in furnace

Forged steel properties of M4 high tool steel

For forging UNS T11304 | M4 steel, Slowly Pre-heat, at temperature/℃: 900~1100 Forged

Processing of HSS Steel Material UNS T11304 | M4

Otai Special provide the Grinding, milling , polishing, turning, drilling and others machining service as your required tolerances and size.

Packing of AISI M4 steel

By steel Wire Bundling then put in container, or as customer require packing.

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Email (English): jack@otaisteel.com