High quality special steel supplier.Old rev.
  • Certified Company

  • Certified Company

    ISO 9001:2008
  • R&D Production

    In China
  • steel for Turbine
    LongHai,Steels of Steam turbine
    High Quality
    Blade of Steam Turbine, Nozzle, Casing, Disc,Rotor,Shaft,Fasteners etc.
  • Longhai,Steels of Power
    High Quality
    We have been supplying power systems for many years and have extensive supply experience.
  • Longhai Steel fo Oil & Gas applications.
    Uses of Steel in Oil and Gas Industry
Markets We Serve

Over the past 15 years, we have established partnerships with customers in more than 20 countries around the world, and we have a stable and continuous cooperation. We look forward to establishing partnerships with more partners.

Working Process
Way for Solution

To take a trivial example, which of us ever undertakes laborious physical exercise, except to enjoy a pleasure that has no annoying consequences.

  • 1

    Technical Requirement


    Safety and innovationAnalyze customer needs and develop production processes.

  • 2



    Different smelting type according to different material requirements.

  • 3


    Hot rolling
    Cold rolling

    Idea of pleasure praisings was complete system.

  • 4

    Heat treatment


    annealing, tempering, normalizing, hardening and tempering, pre-hardening, quench annealing, ageing etc.

28NiCrMoV8-5(1.6932) ESR Bright Bar

28NiCrMoV8-5(1.6932) ESR Bright Bar

28NiCrMoV8-5(1 6932) steels are provided with higher yield strength, tensile strength, endurance strength, yield ratio (about 0 8...

1Cr11Ni2W2MoV|961 Forgings

1Cr11Ni2W2MoV|961 Forgings

1Cr11Ni2W2MoV|961 Forgings

Stainless Steel 446(1.4749, X18CrN28, UNS S44600) Tube Pipe

Stainless Steel 446(1.4749, X18CrN28, UNS S44600) Tube Pipe

Alloy 446 is a ferritic, heat resisting, stainless chromium steel Alloy 446 has extremely good resistance to reducing sulphurous gases, as well as very good resistance to oxidation in air

422(UNS S42200, 616, 1.4935) Stainless Steel Bar

422(UNS S42200, 616, 1.4935) Stainless Steel Bar

422(UNS S42200, 616, 1 4935) Stainless Steel BarAlloy 422 stainless bar is a hardenable, martensitic stainless steel designed fo...

UNS S42200 Round Bar

UNS S42200 Round Bar

Stainless Steel 422 Alloy 422 AMS 5655 UNS S42200 616 B4B

SA-437 Grade B4B

SA-437 Grade B4B

SA-437 Grade B4B This procedure describes the method to be used for examining forging, presswork and rolled bars and defining the acceptance classes referred to in the drawings and the parts specifications