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Home > High Strength Stainless Steel Fasteners > Custom High-Temperature Fasteners from China Factory - Suppliers of 400℃ to 1200℃ High-Strength Solutions Exporters, Product
Custom High-Temperature Fasteners from China Factory - Suppliers of 400℃ to 1200℃ High-Strength Solutions Exporters, Product
Custom High-Temperature Fasteners from China Factory - Suppliers of 400℃ to 1200℃ High-Strength Solutions Exporters, Product
Custom High-Temperature Fasteners from China Factory - Suppliers of 400℃ to 1200℃ High-Strength Solutions Exporters, Product
Custom High-Temperature Fasteners from China Factory - Suppliers of 400℃ to 1200℃ High-Strength Solutions Exporters, Product
Custom High-Temperature Fasteners from China Factory - Suppliers of 400℃ to 1200℃ High-Strength Solutions Exporters, Product
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Custom High-Temperature Fasteners from China Factory - Suppliers of 400℃ to 1200℃ High-Strength Solutions Exporters, Product
Custom High-Temperature Fasteners from China Factory - Suppliers of 400℃ to 1200℃ High-Strength Solutions Exporters, Product
Custom High-Temperature Fasteners from China Factory - Suppliers of 400℃ to 1200℃ High-Strength Solutions Exporters, Product
Custom High-Temperature Fasteners from China Factory - Suppliers of 400℃ to 1200℃ High-Strength Solutions Exporters, Product
Custom High-Temperature Fasteners from China Factory - Suppliers of 400℃ to 1200℃ High-Strength Solutions Exporters, Product

Custom High-Temperature Fasteners from China Factory - Suppliers of 400℃ to 1200℃ High-Strength Solutions Exporters, Product

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In the world of fasteners, our conventional stainless steel and alloy steel products are designed to operate effectively up to 400℃. However, for applications exceeding this temperature, we specialize in high-temperature fasteners that function seamlessly between 400℃ and 1200℃. Sourced from a trusted China factory, our high-temperature fasteners are crafted with rigorous attention to detail, adhering to strict standards for expansion coefficients, anti-corrosion and anti-rust properties, and mechanical performance at elevated temperatures. This comprehensive approach ensures reliability in critical applications such as heat treatment equipment, steam turbines, engines, injection molding, and hot extrusion machinery. As leading suppliers in the industry, we are committed to providing top-quality fasteners tailored to meet the demanding needs of high-temperature environments.

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Product Description

Products Features

7709 steel is a high-performance alloy steel, also known as 21CrMoV5-7, and is widely used in the manufacturing of high-strength, high-temperature-resistant fasteners such as bolts and nuts. The following is an in-depth introduction to the screws made of 1.7709 material:

⚗ (1). Chemical Composition

It mainly consists of carbon (C: 0.17–0.25), silicon (Si: 0.15–0.35), manganese (Mn: 0.35–0.85), chromium (Cr: 1.20–1.50), molybdenum (Mo: 0.65–0.80), and vanadium (V: 0.25–0.35) and other elements. The reasonable proportion of these elements gives the steel excellent comprehensive properties.

⚙ (2). Mechanical Properties

In the heat-treated state, 1.7709 steel has high strength and good mechanical properties. Its yield strength (Rp0.2) can reach ≥550 MPa, tensile strength (PM) can reach ≥700 MPa, elongation (A) ≥16%, and reduction of area (A) ≥60%.

🌡 (3). Heat Resistance

This material can still maintain good mechanical properties in high-temperature environments and is suitable for working conditions with temperatures exceeding 300°C.

Application

High-temperature high-strength fasteners (H-T H-S Fasteners) need to simultaneously meet requirements such as high-temperature strength, anti-rust property and corrosion resistance in extreme environments. Their core application fields are as follows:

  • ✈(1) Aerospace Field
    Aerospace engine: The turbine blade fasteners are manufactured using nickel-based high-temperature alloys (such as GH4049), maintaining a tensile strength of ≥ 1000 MPa at 600–900℃, and achieving complex shape processing through die forging technology. Spacecraft structure: Components used for connecting the combustion chamber of the rocket engine, must withstand instantaneous high temperatures (>1200℃) and vibration loads.
  • ⚡(2) Energy and Power Industry
    Nuclear power plant: The bolts of the reactor pressure vessel must meet a lasting strength of ≥ 95 MPa (at 700°C/100,000 hours), to prevent hydrogen embrittlement and stress corrosion cracking. Gas turbine: High-temperature bolts (such as A286 alloy) are used to fix the turbine discs and must undergo creep limit tests (1% total deformation/1000 hours).
  • 🏭(3) Petroleum Chemical Industry and Marine Engineering
    Refining and processing unit: The bolts of the hydrogenation reactor need to be used for a long time under high temperature and high pressure (400℃/20MPa), and the material must pass the hydrogen-induced delayed fracture test.
  • 🔧(4) Commercial Installation
    Mold manufacturing: The fastening components of composite material molds need to match a low thermal expansion coefficient (CTE ≤ 10⁻⁶/℃) to maintain dimensional stability.
  • 🚗(5) Automobiles and Rail Transit
    New energy vehicles: The motor shaft bolts are made of titanium alloy (such as TC4), with a tensile strength of up to 900 MPa and no magnetic interference. The tapping process needs to be optimized to reduce work hardening.

The Following Is the Main Types of High Temperature Fasteners

📋 Note: The table below lists all available high temperature fastener types with their digital grade, material composition, executive standard, and maximum withstand temperature.
High Temperature Fasteners Available Types
Digital Grade Material Executive Standard Withstand Temperature
2.4851 / UNS N06601 / Alloy601 NiCr23Fe DIN17742 / EN10095 / ASTM B166 1200℃
2.4633 / UNS N06025 / Alloy602 NiCr25FeALY DIN EN 10302 / ASTM B166 1200℃
2.4851 NiCr23Fe DIN EN10095 1200℃
2.4889 NiCr28FeSiCe DIN EN10095 1170℃
1.4854 X6NiCrSiNCe35-25 DIN EN10095 1170℃
1.4762 X10CrAISi25 DIN EN10095 1150℃
2.4816 / UNS N06600 / Alloy600 NiCr15Fe DIN17742 / EN10095 / ASTM B166 1150℃
1.4841 / AISI310S / AISI314 X15CrNiSi25-21 EN10095 / SEW470 1150℃
1.4762 / SICRO12 X10CrAISi25 EN10095 / SEW470 1150℃
2.4665 / UNS N06002 / Alloy X NiCr19NbMo ASTM B572 1100℃
2.4663 / UNS N06617 / Alloy617 NiCr23Co12Mo ASTM B166 1100℃
1.4864 / Alloy330 X12NiCrSi36-16 EN10095 / SEW470 1100℃
1.4835 / Alloy253 MA X9CrNiSiNCe21-11-2 EN10095 1100℃
1.4835 X9CrNiSiNCe21-11-2 DIN EN10095 1100℃
1.4877 X6NiCrNbCe32-27 DIN EN10095 1100℃
1.4872 X25CrMnNiN25-9-7 DIN EN10095 1100℃
1.4841 X15CrNiSi25-21 DIN EN10095 1100℃
2.4816 NiCr15Fe DIN EN10095 1100℃
1.4749 X18CrN28 DIN EN10095 1100℃
1.4845 / AISI310 / AISI3105 X8CrNi25-21 EN10095 / SEW470 / ASTM A276 1050℃
1.4864 X12NiCrSi35-16 DIN EN10095 1050℃
1.4886 X10NiCrSi35-19 DIN EN10095 1050℃
1.4887 X10NiCrSiNb35-22 DIN EN10095 1050℃
1.4821 X15CrNiSi25-4 DIN EN10095 1050℃
1.4876 X10NiCrAITi32-21 DIN EN10095 1050℃
1.4818 X6CrNiSiNCe19-10 DIN EN10095 1050℃
1.4845 X8CrNi25-21 DIN EN10095 1000℃
1.4742 X10CrAISi18 DIN EN10095 1000℃
1.4828 / AISI3095 X15CrNiSi20-12 EN10095 / SEW470 / ASTM A276 1000℃
1.4742 / SICRO 10 X10CrAISi18 EN10095 / SEW470 1000℃
2.4634 / UNS N13021 / Alloy 105 NiCo20Cr15MoAITi ASTM B637 950℃
1.4876H / Alloy800H X10NiCrAITi32-20H ASTM B408 950℃
2.4969 / UNS N07090 / Alloy90 NiCr20Co18Ti DIN EN10302 / BS 2HR2 920℃
1.4876HT / Alloy 800HT X10NiCrAITi32-20HT ASTM B408 900℃
1.4878 / AISI 321H X8CrNiTi18-10 EN10095 / SEW470 850℃
1.4724 / SICRO 9 X10CrAISi13 EN10095 / SEW470 850℃
1.4736 X3CrAITi18-2 DIN EN10095 850℃
1.4828 X15CrNiSi20-12 DIN EN10095 850℃
1.4833 X12CrNi23-13 DIN EN10095 850℃
2.4856 NiCr22Mo9Nb DIN EN10095 850℃
1.4724 X10CrAISi13 DIN EN10095 850℃
1.4878 X8CrNiTi18-10 DIN EN10095 800℃
1.4713 X10CrAISi7 DIN EN10095 800℃
2.4952 / UNS N07080 / Alloy 80A NiCr20TiAI DIN EN10269 / ASTM B 637 800℃
1.4713 / SICRO 8 X10CrAISi7 EN10095 / SEW470 800℃
1.4981 X8CrNiMoNb16-16 — 750℃
2.4668 / UNS N07718 / Alloy 718 NiCr19Fe19Nb5Mo3 DIN EN 10269 / ASTM B637 700℃
1.4986wk X7CrNiMoBNb16-16 DIN EN 10269/2 670℃
1.4980 / Alloy268 / 660A/B/C/D X6NiCrTiMoVB25-15-2 DIN EN10269 / ASTM 453 650℃
2.4669 NiCr15Fe7TiAI — 650℃
2.4952 NiCr20TiAI — 600℃
1.4980 X6NiCrTiMoVB25-15-2 — 600℃
1.4982 X10CrNiMoMnNbVB15-10-1 — 600℃
1.4986 X7CrNiMoBNb16-16 DIN EN 10269 600℃
1.7233 42CrMo5-6 — 600℃
1.4923 X22CrMoV12-1 DIN EN 10269 600℃
1.4913 X19CrMoNbVN11-1 DIN EN 10269 600℃
1.7711 40CrMoV4-6 DIN EN 10269 550℃
1.7709 21CrMoV5-7 DIN EN 10269 550℃
1.7218 25CrMo4 DIN EN 10269 550℃
1.4562 / UNS N08031 / Alloy31 X1NiCrMoCu32-28-7 ASTM B581 / B649 550℃
1.7711 40CrMoV4-6 DIN EN 10269 550℃
1.4913 X19CrMoNbVN11-1 DIN EN 10269 550℃
1.4948 X6CrNi18-10 — 550℃
1.4429 X2CrNiMoN17-13-3 — 550℃
1.4401 X5CrNiMo17-12-2 — 500℃
1.4404 X2CrNiMo17-12-2 — 500℃
1.4303 X4CrNi18-12 DIN EN10269 500℃
1.4301 X4CrNi18-10 — 500℃
1.4307 X2CrNi18-9 — 500℃
1.7729 20CrMoVTiB4-10 — 500℃
1.7729 20CrMoVTiB4-10 DIN EN 10269 500℃
1.7225 42CrMO4 DIN EN 10269 500℃
2.4858 / UNS N08825 / Alloy825 NiCr21Mo DIN17744 / 17752 / ASTM B425 450℃
2.4856 / UNS N06625 / Alloy625 NiCr22Mo9Nb ASTM B446 / B564 / E112 450℃
2.4816 / UNS N06600 / Alloy600 NiCr15Fe ASTM B 166 450℃
2.4605 / UNS N06059 / Alloy59 NiCr23Mo16AI ASTM B574 / B564 450℃
2.4610 / UNS N06455 / Alloy C4 NiMo16Cr16Ti ASTM B574 / B564 400℃
2.4602 / UNS N06022 / Alloy C22 NiCr21Mo14W ASTM B574 / B564 400℃
1.4571 / AISI 316Ti X6CrNiMoTi17-12-2 DIN EN 10088-3 / 10272 400℃
1.4541 / AISI 321 X6CrNiTi18-10 DIN EN 10088-3 / 10272 400℃
1.4539 / AISI 904L X1NiCrMoCu25-20-5 DIN EN 10088-3 / 10272 400℃
1.4529 / Alloy926 X1NiCrMoCu25-20-7 DIN EN 10088-3 / 10272 400℃
1.4429 / AISI 316LN X2CrNiMoN17-13-3 DIN EN 10269 / 10272 400℃
1.4404 / AISI 316L X2CrNiMo17-12-2 DIN EN 10269 / 10272 400℃
1.4923 X22CrMoV12-1 DIN EN 10269 400℃
1.7225 42CrMo4 DIN EN 10269 400℃
1.7709 21CrMoV5-7 DIN EN 10269 400℃
1.7258 24CrMo5 — 400℃
1.7219 26CrMo4 — 400℃
1.7218 25CrMo4 DIN EN 10269 400℃
1.4571 X6CrNiMoTi17-12-2 — 400℃
1.739 X15CrMo5-1 — 400℃
1.1133 20Mn5 — 400℃

Frequently Asked Questions (FAQ)

Q What is 1.7709 steel (21CrMoV5-7) and what makes it suitable for high-temperature fasteners?
1.7709 steel, also designated as 21CrMoV5-7, is a high-performance chromium-molybdenum-vanadium alloy steel. Its combination of chromium (1.20–1.50%), molybdenum (0.65–0.80%), and vanadium (0.25–0.35%) provides excellent high-temperature strength, creep resistance, and thermal stability. These properties make it ideal for bolts, nuts, and studs operating in elevated temperature environments up to 550°C.
Q What are the key mechanical properties of 1.7709 (21CrMoV5-7) fasteners after heat treatment?
After heat treatment, 1.7709 steel fasteners exhibit the following mechanical properties: yield strength (Rp0.2) ≥ 550 MPa, tensile strength ≥ 700 MPa, elongation (A) ≥ 16%, and reduction of area ≥ 60%. These values ensure reliable performance under both static and dynamic loading conditions in high-temperature service.
Q Which material grades can withstand the highest temperatures, and in what applications are they used?
Materials such as 2.4851 (NiCr23Fe / Alloy 601), 2.4633 (NiCr25FeALY / Alloy 602), and 2.4816 (NiCr15Fe / Alloy 600) can withstand temperatures up to 1200°C. They are primarily used in aerospace engine turbine blade fasteners, rocket combustion chamber connections, and industrial furnace components where extreme thermal resistance is critical.
Q What standards govern the manufacturing of high-temperature fasteners listed in the table?
High-temperature fasteners are manufactured according to various international standards depending on the material grade. Common standards include DIN EN 10269, DIN EN 10095, ASTM B166, ASTM B637, ASTM B408, and EN10302, among others. These standards define the chemical composition, mechanical properties, heat treatment requirements, and dimensional tolerances for each material grade.
Q How do I select the right high-temperature fastener material for my application?
Material selection depends on several factors: the maximum operating temperature, required mechanical strength (tensile and yield), exposure to corrosive media (e.g., hydrogen, sulfur, chlorides), thermal cycling conditions, and applicable industry standards. For example, 1.7709 is suitable for steam turbine bolts up to 550°C, while nickel-based alloys such as Alloy 718 (2.4668) are preferred for gas turbine applications up to 700°C.
Q Can high-temperature fasteners be used in corrosive environments such as chemical plants or offshore platforms?
Yes. Many high-temperature fastener materials also offer excellent corrosion resistance. For example, Alloy 625 (2.4856 / NiCr22Mo9Nb) and Alloy 825 (2.4858 / NiCr21Mo) provide outstanding resistance to pitting, crevice corrosion, and stress corrosion cracking in aggressive chemical and marine environments. Stainless steel grades such as 1.4404 (AISI 316L) and 1.4539 (AISI 904L) are also widely used in petrochemical and offshore applications.

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