China High-Strength Stainless Steel Fasteners Inconel Bolts - Leading China Suppliers & Factory Supplier, Products

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China High-Strength Stainless Steel Fasteners Inconel Bolts - Leading China Suppliers & Factory Supplier, Products

Stainless steel high-strength fasteners are essential components made from premium stainless steel materials, offering exceptional strength and impressive corrosion resistance. These fasteners are ideal for applications that must endure heavy loads and operate in harsh environments. Our collection includes various types such as authenticated stainless steel high-strength fasteners, martensitic stainless steel fasteners, ferritic stainless steel fasteners, and duplex stainless steel fasteners. As a leading supplier and factory in China, we guarantee high-quality products tailored to meet your specific needs, ensuring durability and reliability in every use. Trust us for your stainless steel fastener requirements and experience unparalleled performance

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Product Description

Austenitic Stainless Steel High-Strength Fasteners

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Composition:
Chromium (16–26%) & Nickel (6–22%)
Common grades: 304, 316

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Characteristics:
Strong corrosion resistance, non-magnetic, good toughness, easy to process, excellent welding performance.

① Food Processing & Kitchenware Austenitic stainless steel (e.g. 1.4310CSPFH, SUS301) is widely used in food processing equipment, kitchenware (knives, pots) and tableware, meeting food-grade cleaning requirements and being less likely to contaminate food.
② Chemical and Energy Equipment Chemical industry: Used in reaction vessels, pipelines, storage tanks, etc., resistant to corrosive media such as acids, alkalis, and salts.
Petroleum and natural gas: Manufacturing corrosion-resistant components such as valves and pump shafts; e.g. S20910 stainless steel is suitable for high-temperature and high-pressure environments.
③ Architecture and Decoration Used for exterior walls, railings, roofs, etc., combining both beauty and durability.
④ Transportation Automobile manufacturing: SUS301 is used for body structure components, exhaust pipes, etc., achieving both lightweight and high strength.
Aerospace: Materials such as S20910 are used for engine parts and fasteners, meeting requirements of high strength and high temperature resistance.

Martensitic Stainless Steel High-Strength Fasteners

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Composition:
Chromium (12–18%) & Carbon (0.1–1.2%)
Common grades: 410, 420

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Characteristics:
Strength and hardness enhanced through heat treatment, good wear resistance, relatively weak corrosion resistance, magnetic.

① Medical Devices and Surgical Instruments Surgical instruments such as scissors, forceps, and surgical knives must meet the requirements of high hardness and corrosion resistance.
② Industrial Cutting Tools and Mechanical Components Food processing tools: Z30Cr13 martensitic stainless steel tools have superior corrosion resistance to Cl⁻ compared to 420J2.
③ Aerospace and Defense Aircraft components: Used for missile casings, engine parts, etc., meeting requirements for high strength and corrosion resistance.

Ferritic Stainless Steel High-Strength Fasteners

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Composition:
Chromium (10.5–30%), low carbon content
Common grades: 430, 446

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Characteristics:
Excellent corrosion resistance (especially stress corrosion), magnetic, medium strength, average welding performance.

① Automobile Industry Exhaust system components such as exhaust pipes and mufflers utilize high-temperature oxidation resistance (working temperature up to 800°C) and low thermal expansion coefficient.
② Appliances and Kitchenware Appliance exteriors: refrigerator door handles, microwave oven shells, etc., meeting requirements of durability and cleanliness.
③ Commercial Installation Chemical containers: Used for corrosion-resistant linings or pipelines. The S32803 grade performs exceptionally well in chemical reactors.

Duplex Stainless Steel High-Strength Fasteners

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Composition:
Chromium (18–28%), Nickel (4.5–8%), Molybdenum (2.5–4%)
Common grades: 2205, 2507

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Characteristics:
Combines advantages of austenite and ferrite: high strength, excellent corrosion resistance, strong resistance to stress corrosion and pitting corrosion.

① Petroleum and Natural Gas Industry Sub-sea pipelines and equipment: S31803 duplex stainless steel manufactures sub-sea pipelines, valves and pump bodies with superior Cl-SCC resistance over austenitic grades.
High-pressure and high-temperature environments: Suitable for oil and gas extraction, storage and transportation equipment, such as coolers for effluent from hydrogenation reactors.
② Chemical and Environmental Protection Equipment Reactors and heat exchangers: Contact with acidic media (acetic acid, formic acid) with outstanding resistance to local corrosion.
Flue gas desulfurization systems: Resistant to corrosive environments containing sulfur and chloride ions.
③ Ocean Engineering Vessels and propellers: Resistant to seawater corrosion, suitable for marine platform components and high-pressure pipelines for seawater desalination.
④ Architecture and Energy Nuclear power plant cooling systems: Used in key facilities, resistant to high-temperature oxidation and stress corrosion.

High Strength Stainless Steel Fasteners — Available Types

Performance Introduction and Supply Range of Stainless Steel High Strength Fasteners
Types		Grade	Tensile Strength Min	Yield Strength Min	Elongation after Break Min	Percentage of Elongation Min	Percentage of Contraction Min	Hardness Range			Executive Standard	Scopes of Supply
Types		Grade	Tensile Strength Min	Yield Strength Min	Elongation after Break Min	Percentage of Elongation Min	Percentage of Contraction Min	HV	HRC	HBW	Executive Standard	Scopes of Supply
Austenitic Stainless Steel	A1 A2 A3	50	500	210	0.6d			—	—	—	ISO3506/1-2020	M1 — M140
		70	700	450	0.4d			—	—	—	ISO3506/1-2020	M3 — M64
		80	800	600	0.3d			—	—	—	ISO3506/1-2020	M3 — M48
	A4 A5	50	500	210	0.6d			—	—	—	ISO3506/1-2020	M1 — M140
		70	700	450	0.4d			—	—	—	ISO3506/1-2020	M3 — M64
		80	800	600	0.3d			—	—	—	ISO3506/1-2020	M3 — M48
		100	1000	800	0.2d			—	—	—	ISO3506/1-2020	M6 — M16
	A8	70	700	450	0.4d			—	—	—	ISO3506/1-2020	M3 — M64
		80	800	600	0.3d			—	—	—	ISO3506/1-2020	M3 — M36
		100	1000	800	0.2d			—	—	—	ISO3506/1-2020	M6 — M16
Duplex Stainless Steel	D2 D4 D6 D8	70	700	450	0.4d			—	—	—	ISO3506/1-2020	M3 — M64
		80	800	600	0.3d			—	—	—	ISO3506/1-2020	M3 — M48
		100	1000	800	0.2d			—	—	—	ISO3506/1-2020	M6 — M16
Martensitic Stainless Steel	C1	50	500	250	0.2d			155 — 220	—	147 — 209	ISO3506/1-2020	M5 — M140
		70	700	410	0.2d			220 — 330	20 — 34	209 — 314	ISO3506/1-2020	M5 — M140
		110	1100	820	0.2d			350 — 440	36 — 45	—	ISO3506/1-2020	M5 — M64
	C3	80	800	640	0.2d			240 — 340	21 — 35	228 — 323	ISO3506/1-2020	M5 — M140
	C3	120	1200	950	0.2d			380 — 480	39 — 48	—	ASTM F738M-02	M6 — M64
	C4	50	500	250	0.2d			155 — 220	—	147 — 209	ISO3506/1-2020	M1 — M140
		70	700	410	0.2d			220 — 330	20 — 34	209 — 314	ISO3506/1-2020	M3 — M64
		110	1100	820	0.2d			350 — 440	36 — 45	—	ASTM F738M-02	M6 — M64
Precipitation-Hardening Stainless Steel	P1	90	900	700	0.2d			285 — 370	28 — 38	—	ASTM F738M-02	M6 — M64
	XM-12	H900	1310	1170		10%	35%		40 Min		ASTM A564-2019	M5 — M140
	XM-13	H950	1515	1415		10%	45%		45 Min		ASTM A564-2019	M5 — M140
	XM-16	H900	1620	1515		8%	30%		47 Min		ASTM A564-2019	M5 — M140
	XM-25	H900	1240	1170		10%	40%		39 Min		ASTM A564-2019	M5 — M140
	S11100	H900	1700	1590		11%	43%		47 Min		ASTM A564-2019	M5 — M140
	S17400	H900	1310	1170		10%	40%		40 Min		ASTM A564-2019	M5 — M140
	S45503	H900	1620	1520		8%	30%		47 Min		ASTM A564-2019	M5 — M140
	S46500	H950	1655	1515		10%	45%		47 Min		ASTM A564-2019	M5 — M140

Frequently Asked Questions (FAQ)

Q What are the main types of stainless steel used for high-strength fasteners?

The four main types of stainless steel used for high-strength fasteners are: Austenitic (e.g. 304, 316), Martensitic (e.g. 410, 420), Ferritic (e.g. 430, 446), and Duplex (e.g. 2205, 2507). Each type offers a distinct combination of strength, corrosion resistance, and magnetic properties suited for different applications.

Q What is the difference between austenitic and martensitic stainless steel fasteners?

Austenitic stainless steel fasteners (e.g. grades A1–A8) are non-magnetic, offer excellent corrosion resistance and toughness, and are widely used in food, chemical, and architectural applications. Martensitic stainless steel fasteners (e.g. grades C1, C3, C4) are magnetic, can be hardened by heat treatment for higher strength and wear resistance, but have comparatively lower corrosion resistance. They are preferred in surgical instruments, cutting tools, and aerospace components.

Q What standard governs the performance of stainless steel high-strength fasteners?

Most stainless steel high-strength fasteners are manufactured and tested in accordance with ISO 3506/1-2020, which covers mechanical properties for bolts, screws, and studs. Certain grades, particularly precipitation-hardening types (e.g. XM-12, S17400, S46500), are governed by ASTM A564-2019 and ASTM F738M-02.

Q Why is duplex stainless steel preferred for offshore and subsea applications?

Duplex stainless steel (e.g. S31803, 2205, 2507) combines the microstructure of both austenite and ferrite, delivering superior resistance to chloride stress corrosion cracking (Cl-SCC) compared to standard austenitic grades. This makes it ideal for subsea pipelines, marine platform components, seawater desalination systems, and high-pressure oil and gas equipment where exposure to chlorides and high pressures is constant.

Q What tensile strength levels are available for stainless steel high-strength fasteners?

Stainless steel high-strength fasteners are available across a wide range of tensile strength grades. Standard grades under ISO 3506/1-2020 include 500 MPa, 700 MPa, 800 MPa, and 1000 MPa. Precipitation-hardening grades (ASTM A564-2019) can reach up to 1700 MPa tensile strength (e.g. S11100 at H900 condition), making them suitable for the most demanding structural and aerospace applications.

Q What size range is available for stainless steel high-strength fasteners?

The supply range varies by material type and grade. Austenitic grades (A1–A3) and some martensitic grades (C4) cover the widest range from M1 to M140. Most standard grades are available from M3 to M64, while higher-strength grades such as A4/A5-100 and A8-100 are typically available in smaller sizes from M6 to M16. Precipitation-hardening grades generally cover M5 to M140.

Product Detail

China High-Strength Stainless Steel Fasteners Inconel Bolts - Leading China Suppliers & Factory Supplier, Products

Product Description

Austenitic Stainless Steel High-Strength Fasteners

Martensitic Stainless Steel High-Strength Fasteners

Ferritic Stainless Steel High-Strength Fasteners

Duplex Stainless Steel High-Strength Fasteners

High Strength Stainless Steel Fasteners — Available Types

Frequently Asked Questions (FAQ)

Related Products

Product Detail

China High-Strength Stainless Steel Fasteners Inconel Bolts - Leading China Suppliers & Factory Supplier, Products

Product Description

Austenitic Stainless Steel High-Strength Fasteners

Martensitic Stainless Steel High-Strength Fasteners

Ferritic Stainless Steel High-Strength Fasteners

Duplex Stainless Steel High-Strength Fasteners

High Strength Stainless Steel Fasteners — Available Types

Frequently Asked Questions (FAQ)

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