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Powder Metallurgy
        Tiangong operates the first industrialized powder metallurgy production line in China, representing the internationally advanced third-generation metal powder manufacturing technology. Its two core technologies are the oxygen gas atomization based (OGA-based) powdering and hot isostatic pressing (HIP).
        The OGA-based powdering technology is to heat metal to a liquid state, jet high-speed gas to impact the liquid metal and break it into small droplets, cool and solidify these metal droplets in the air, then pass through a sieve to filter out powders of unacceptable sizes, and ultimately yield metal powder that meets specifications. Powders obtained via this technology offer the following advantages: fine particle size (1 to 500 microns), uniform distribution, high sphericity, low oxygen content (≤ 80 ppm), and minimal impurities (non-metallic inclusions).
        The HIP is an advanced metallurgical technology that achieves 100% densification of materials under high temperature and pressure, thereby enhancing material properties. This technology can significantly increase the material density, improve internal microstructural homogeneity, and substantially enhances mechanical properties as well as overall quality stability.
        The most distinctive feature of powder metallurgy steel lies in its exceptionally fine and homogeneous microstructure. Since the starting material consists of fine and compositionally uniform powder particles, the microstructure after hot isostatic pressing presents superior uniformity and finer distribution of carbides and alloying elements compared to conventional cast and wrought steels. This process significantly mitigates problems such as macro-segregation, micro-segregation, and coarse grain boundary carbides, enhancing the material’s homogeneity, isotropy, and overall performance.

PM High Speed Steel

TG PM Grade As-Shipped Hardness C Cr W Mo V Co Other Hardness after Heat Treatment（HRC） Main properties Applications
TPM330 ≤HB260 1.3 4.2 6.4 5 3.1 - - 60-66 Third-Generation Powder Metallurgy High Speed Steel, offering excellent wear resistance and toughness. Well-suited for blanking dies of medium-high carbon steels and high-strength steels, as well as plastic moulds and IC (Integrated Circuit) encapsulation moulds with demanding wear resistance requirements.
TPM380 ≤HB300 2.48 4.2 4.2 3.1 8 - - 56-65 Third-Generation Powder Metallurgy High Speed Steel, offering excellent wear resistance and toughness. Suitable for cold work tools, woodworking cutters, paper cutting blades, bi-metal saw blades, and similar applications.
TPM5311 ≤HB350 1.2 4.2 9 3.5 3.1 9.8 - 65-67 Third-Generation Powder Metallurgy High Speed Steel with excellent wear resistance, toughness, and high-temperature stability. Cutting tools such as blades, milling cutters, threading tools, and drill bits; mould manufacturing including injection moulds and extrusion dies.
TPM539 ≤HB300 1.54 3.8 9.6 5.1 3 9.2 - 56-64 Third-Generation Powder Metallurgy High Speed Steel with excellent wear resistance and red hardness. Production of hobs, gear milling cutters, various types of cutting tools, and heavy-duty machining tools.
TPM5511 ≤HB350 2 3.8 14.3 2.5 5.1 11 - 65-70 Third-Generation Powder Metallurgy High Speed Steel with exceptional wear resistance, compressive strength, and red hardness. High-performance cutting tools and cold work dies requiring exceptional wear resistance for processing carbide materials prone to chipping.
TPM555 ≤HB280 1.63 4.25 12 0.25 4.75 5 - 60-68 Third-Generation Powder Metallurgy High Speed Steel with superior wear resistance. Suitable for hobs, broaches, and milling cutters.
TPM558 ≤HB300 1.6 4.8 10 2 5 8 - 64-68 Third-Generation Powder Metallurgy High Speed Steel with exceptional wear resistance, red hardness, and high hardness. High-performance cutting tools and cold work dies with demanding wear resistance requirements.
TPM5610 ≤HB350 2.15 4.75 13 0.45 6 10 - 63-70 Third-Generation Powder Metallurgy High Speed Steel with superior wear resistance, toughness, red hardness, and high-temperature stability. Hobs, broaches, milling cutters, taps, thread rollers.
TPM638 ≤HB300 1.28 4.2 6.4 5 3.1 8.5 - 60-66 Third-Generation Powder Metallurgy High Speed Steel with good toughness, excellent wear resistance, and red hardness. Multi-point cutting tools and blanking dies for medium-high carbon steels & high-strength steel plates.
TPM6711 ≤HB340 2.3 4.2 6.5 7.3 6.5 10.5 - 60-68 Third-Generation Powder Metallurgy High Speed Steel with superior wear resistance, excellent toughness, and exceptional red hardness. Suitable for multi-point and single-point metal-cutting tools, cold work applications demanding high wear resistance, and IC (integrated circuit) encapsulation moulds.
TPM692 ≤HB240 2.47 4.25 0.9 3.9 8.85 1.9 - 58-64 Third-Generation Powder Metallurgy High Speed Steel with superior wear resistance, toughness, and dimensional stability. Machine cutting tools, cold roll forming, stamping, fine blanking, punching, powder compacting, thread rolling.
TPMM2 ≤HB240 0.9 4 6.1 4.9 1.83 - - 58-64 Third-Generation Powder Metallurgy Tool Steel with superior strength and toughness. Widely used in cutting tools (such as taps, drill bits, milling cutters, saw blades) and cold work dies.
TPMM35 ≤HB300 0.92 4.2 6 4.9 1.9 4.8 - 60-66 Third-Generation Powder Metallurgy High Speed Steel with high wear resistance, toughness, red hardness, and bending strength. Ideal for manufacturing heavy-duty cutting tools requiring wear/impact resistance, high-grade stamping dies, thread rolling dies, and complex tools demanding high toughness (e.g. reamers, milling cutters, drills, punches). Primary applications include hobs, broaches, and end mills.
TPMM4 ≤HB260 1.45 4.25 5.75 4.5 4 - - 60-66 Third-Generation Powder Metallurgy High Speed Steel, offering excellent wear resistance and toughness. Suitable for blanking dies of medium-high carbon steels and high-strength steels, as well as various cutting tools.
TPMM42 ≤HB280 1.1 3.85 1.35 9.4 1.1 7.95 - 60-68 Third-Generation Powder Metallurgy High Speed Steel, offering excellent wear resistance and toughness. Cold-worked parts, rollers, scrapers, gear hobs, drill bits, etc.
TPMM4S ≤HB260 1.4 4.1 5.5 4.85 3.9 - +S 60-66 Third-Generation Powder Metallurgy High Speed Steel, offering excellent wear resistance and toughness. Suitable for blanking dies of medium-high carbon steels and high-strength steels, as well as various cutting tools. The addition of sulfur significantly improves machinability.

PM mould Steel

TG PM Grade As-Shipped Hardness C Cr W Mo V Co Other Hardness after Heat Treatment（HRC） Main properties Applications
TPMB101S ≤HB300 2.5 5.25 - 1.3 9.35 - - 56-64 Third-Generation Powder Metallurgy mould Steel with superior wear resistance and toughness. Stamping or Forming Tools; Machine Cutters and Blades; Plastic mould Inserts & Wear-Prone Components; Stamped Parts and Dies; Blanking and Punching Dies.
TPMB12 ≤HB280 0.58 4.4 2.35 2.81 1.1 3.7 - 58-64 Third-Generation Powder Metallurgy mould Steel with excellent toughness, strength, and dimensional stability. Fine Blanking, Stamping, Cold Forming, Coining, Tableting Dies, Rolling.
TPMB13 ≤HB240 0.55 4.15 - 3 1 - - 57-59 Third-Generation Powder Metallurgy mould Steel with superior wear resistance, toughness, and high-temperature stability. Hot & Warm Forming Dies, Hot Shearing Dies, Hot Heading Dies, Extrusion Dies, Forging Dies and Punches; Cold Heading Dies, High-Pressure Blanking Dies, Thread Rolling Dies.
TPMB31 ≤HB260 0.81 7.75 - 1.35 2.8 - - 58-60 Third-Generation Powder Metallurgy mould Steel with superior wear resistance, toughness, and resistance to fracture and chipping. Stamping or Forming Tools, Stamped Parts and Dies, Powder Compaction Tools, Blanking Dies, Industrial Knives and Slitting Machines, Shear Blades, Blank Stamping Tools, Cold Heading Tools, Rolls, Plastic Injection Feed Screws and Barrel Sections.
TPMB32 ≤HB240 1.1 7.5 1.15 1.6 2.4 - - 60-64 Third-Generation Powder Metallurgy mould Steel with superior wear resistance and toughness. Forming, blanking, fine blanking, and cold forging of stainless steel plates, high-strength steel plates, copper plates, and aluminum plates.
TPMB43 ≤HB250 1.5 4 2.5 2.5 4 - - 60-65 Third-Generation Powder Metallurgy mould Steel with superior wear resistance, strength, and toughness. Blanking, fine blanking, and forming of thick plates including stainless steel, low-carbon steel, high-strength steel, copper, and aluminum.
TPMB44 ≤HB230 1.4 4.7 - 3.5 3.7 - - 58-64 Third-Generation Powder Metallurgy mould Steel with superior wear resistance and toughness. Forming and blanking of stainless steel, high-strength steel, copper, and aluminum.
TPMB91 ≤HB260 1.83 5.25 - 1.35 8.7 - - 54-56 Third-Generation Powder Metallurgy mould Steel with high toughness and heat cracking resistance. Forming Rolls, Work Rolls, Punches, Dies, Slitting Knives, Shear Blades, Shredder Blades.
TPMCPOH ≤HB300 0.94 7.9 - 2.35 0.3 - - 58-64 Third-Generation Powder Metallurgy mould Steel with excellent toughness and machinability. Blanking Dies, Cold Forming Dies, Cold Drawing Dies, Forming Rolls, Punches, Precision Stamping Dies, etc.

PM Stainless Steel

TG PM Grade As-Shipped Hardness C Cr W Mo V Co Other Hardness after Heat Treatment（HRC） Main properties Applications
TPMD31 ≤HB280 1.7 18 - 1 3 - - 54-60 Third-Generation Powder Metallurgy Stainless Steel with superior wear and corrosion resistance. Plastic moulds for connectors, integrated circuits (IC), and other components requiring high wear and corrosion resistance.
TPMD41A ≤HB280 1.9 20 0.6 1 4 - - 54-60 This steel grade is a martensitic chromium stainless steel, characterized by high wear resistance and good corrosion resistance. Cutting Tools, Mechanical Components for Food Processing Industry.
TPMD91 ≤HB280 2.36 14.23 - 1.06 8.62 - - 56-60 Third-Generation Powder Metallurgy Stainless Steel with superior wear and corrosion resistance. Injection moulding and Extrusion Screws; Sprue Gates and Nozzles; Industrial Cutters; Injection moulds; Wear-Resistant Components such as Bearings and Bushings.