Custom High-Temperature Fasteners from China Suppliers - High Strength Up to 1200℃ | Factory Direct Quality Exporters, Product

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Custom High-Temperature Fasteners from China Suppliers - High Strength Up to 1200℃ | Factory Direct Quality Exporters, Product

At our factory in China, we specialize in high-temperature fasteners designed for extreme operating conditions. While conventional stainless steel and alloy steel fasteners have an upper operating temperature limit of 400℃, our high-temperature fasteners can withstand temperatures ranging from 400℃ to 1200℃. Exceeding this limit can significantly impair the properties of standard fasteners. Our high-temperature fasteners are engineered with precision, adhering to rigorous standards that ensure optimal performance in challenging environments. We consider key factors such as expansion coefficients, corrosion resistance, mechanical strength at elevated temperatures, and anti-loosening capabilities. These fasteners are ideal for critical applications including heat treatment equipment, steam turbines, engines, injection molding, and hot extrusion machinery. Partner with us, a trusted supplier in China, to enhance your operations with our superior high-temperature fasteners.

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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: Turbine blade fasteners manufactured using nickel-based high-temperature alloys (such as GH4049), maintaining tensile strength ≥1000 MPa at 600–900℃, processed via die forging technology.

Spacecraft structure: Components connecting rocket engine combustion chambers must withstand instantaneous high temperatures (>1200℃) and vibration loads.

(2) Energy & Power Industry

Nuclear power plant: Reactor pressure vessel bolts must meet lasting strength ≥95 MPa (at 700°C/100,000 hours), preventing hydrogen embrittlement and stress corrosion cracking.

Gas turbine: High-temperature bolts (such as A286 alloy) fix turbine discs and must undergo creep limit tests (1% total deformation/1000 hours).

(3) Petroleum Chemical & Marine Engineering

Refining and processing unit: Hydrogenation reactor bolts must operate long-term under high temperature and high pressure (400℃/20MPa); material must pass the hydrogen-induced delayed fracture test.

(4) Commercial Installation

Mold manufacturing: Fastening components of composite material molds need to match a low thermal expansion coefficient (CTE ≤10⁻⁶/℃) to maintain dimensional stability.

(5) Automobiles & Rail Transit

New energy vehicles: Motor shaft bolts made of titanium alloy (such as TC4), with tensile strength 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

⚠ The table below lists all available high temperature fastener types, including digital grade, material designation, executive standard, and maximum withstand temperature for each alloy.

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)

QWhat is 1.7709 (21CrMoV5-7) steel and what makes it suitable for high-temperature fasteners?

1.7709 steel, also known as 21CrMoV5-7, is a chromium-molybdenum-vanadium alloy steel. Its carefully balanced chemical composition — including Cr (1.20–1.50%), Mo (0.65–0.80%), and V (0.25–0.35%) — provides excellent strength retention at elevated temperatures, making it ideal for high-temperature bolts and nuts used in power generation, petrochemical, and industrial applications up to 550°C.

QWhat is the maximum operating temperature for high-temperature fasteners listed in your range?

Our high-temperature fastener range covers materials capable of withstanding temperatures from 400°C up to 1200°C. The highest-rated materials include Alloy601 (2.4851/NiCr23Fe) and Alloy602 (2.4633/NiCr25FeALY), both rated for continuous service at up to 1200°C, making them suitable for the most extreme thermal environments such as industrial furnaces and aerospace components.

QWhich material standards do your high-temperature fasteners comply with?

Our fasteners comply with a wide range of international standards, including DIN EN 10269, DIN EN 10095, ASTM B166, ASTM B637, ASTM B408, EN10095, SEW470, and others. The applicable standard varies by material grade. Please refer to the product table above for specific standards corresponding to each digital grade.

QWhich high-temperature fastener material is recommended for nuclear power plant applications?

For nuclear power plant reactor pressure vessel applications, materials must meet stringent requirements including lasting strength ≥95 MPa at 700°C over 100,000 hours, and resistance to hydrogen embrittlement and stress corrosion cracking. Nickel-based alloys such as Alloy718 (2.4668/NiCr19Fe19Nb5Mo3) and Alloy617 (2.4663/NiCr23Co12Mo) are commonly recommended for such critical service conditions.

QCan high-temperature fasteners be used in both aerospace and petrochemical industries?

Yes. High-temperature high-strength fasteners (H-T H-S Fasteners) are engineered to perform across multiple demanding industries. In aerospace, they withstand extreme heat and vibration in engine and combustion chamber assemblies. In petrochemical applications, they are used in hydrogenation reactors and high-pressure vessels, where both elevated temperature (up to 400°C) and high pressure (up to 20 MPa) resistance are required simultaneously.

QHow do I select the right high-temperature fastener material for my application?

Material selection depends on several key factors: (1) the maximum operating temperature of your application; (2) required mechanical properties such as tensile and yield strength; (3) the corrosive or chemical environment (e.g., hydrogen, oxidation, sulfur); (4) applicable industry standards; and (5) budget considerations. Please refer to our materials table for a full comparison, or contact our technical team for a customized recommendation based on your specific working conditions.

Product Detail

Custom High-Temperature Fasteners from China Suppliers - High Strength Up to 1200℃ | Factory Direct Quality Exporters, Product

Product Description

Products Features

Application

The Following Is the Main Types of High Temperature Fasteners

Frequently Asked Questions (FAQ)

Related Products

Product Detail

Custom High-Temperature Fasteners from China Suppliers - High Strength Up to 1200℃ | Factory Direct Quality Exporters, Product

Product Description

Products Features

Application

The Following Is the Main Types of High Temperature Fasteners

Frequently Asked Questions (FAQ)

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