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

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

Stainless steel high-strength fasteners are essential components crafted from premium stainless steel materials, renowned for their exceptional strength and remarkable corrosion resistance. These fasteners are ideal for applications requiring the ability to endure heavy loads and operate in harsh environments. Our range includes authentic stainless steel high-strength fasteners, martensitic, ferritic, and duplex stainless steel fasteners. As a leading supplier and factory in China, we ensure the highest quality standards in our products, making us your trusted choice for durable and reliable fasteners

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Product Description

Austenitic Stainless Steel High-Strength Fasteners

Composition

Mainly contains chromium (16–26%) and nickel (6–22%). Common grades include 304 and 316.

Characteristics

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

Applications

Food Processing & Kitchenware: Grades such as 1.4310CSPFH and SUS301 are widely used in food processing equipment, kitchenware (knives, pots) and tableware, meeting food-grade cleaning requirements.
Chemical & Energy Equipment: Used in reaction vessels, pipelines, storage tanks; resistant to acids, alkalis, and salts. S20910 stainless steel is suitable for high-temperature and high-pressure environments in petroleum and natural gas applications.
Architecture & Decoration: Used for exterior walls, railings, and roofs — combining beauty and durability.
Transportation: SUS301 is used for automotive body structures and exhaust pipes. S20910 is used in aerospace engine parts and fasteners requiring high strength and temperature resistance.

Martensitic Stainless Steel High-Strength Fasteners

Composition

Contains chromium (12–18%) and carbon (0.1–1.2%). Common grades include 410 and 420.

Characteristics

Strength and hardness can be enhanced through heat treatment, good wear resistance, but relatively weak corrosion resistance, and magnetic.

Applications

Medical Devices & Surgical Instruments: Scissors, forceps, surgical knives — meeting requirements of high hardness and corrosion resistance.
Industrial Cutting Tools & Mechanical Components: Z30Cr13 martensitic stainless steel tools offer superior corrosion resistance to Cl⁻ compared to 420J2.
Aerospace & Defense: Used for missile casings and engine parts, meeting requirements for high strength and corrosion resistance.

Ferritic Stainless Steel High-Strength Fasteners

Composition

Contains chromium (10.5–30%), low carbon content. Common grades include 430 and 446.

Characteristics

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

Applications

Automobile Industry: Exhaust pipes and mufflers — leveraging high-temperature oxidation resistance (up to 800°C) and low thermal expansion coefficient.
Appliances & Kitchenware: Refrigerator door handles, microwave oven shells — meeting durability and cleanliness requirements.
Commercial Installation: Corrosion-resistant linings or pipelines; S32803 grade performs exceptionally well in chemical reactors.

Duplex Stainless Steel High-Strength Fasteners

Composition

Contains chromium (18–28%), nickel (4.5–8%), and molybdenum (2.5–4%). Common grades include 2205 and 2507.

Characteristics

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

Applications

Petroleum & Natural Gas: S31803 is used for subsea pipelines, valves, and pump bodies. Superior resistance to chloride stress corrosion cracking (Cl-SCC) vs. austenitic steel. Suitable for oil/gas extraction and storage equipment including hydrogenation reactor effluent coolers.
Chemical & Environmental Protection: Reactors and heat exchangers in contact with acidic media (acetic acid, formic acid); flue gas desulfurization systems resistant to sulfur and chloride ion environments.
Ocean Engineering: Vessel components and propellers resistant to seawater corrosion; suitable for marine platform components and seawater desalination high-pressure pipelines.
Architecture & Energy: Nuclear power plant cooling systems — 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 is the difference between austenitic and martensitic stainless steel fasteners?

Austenitic stainless steel fasteners (e.g., grades 304, 316) are non-magnetic, offer excellent corrosion resistance and toughness, and are easy to weld and process. Martensitic stainless steel fasteners (e.g., grades 410, 420) are magnetic, can be hardened through heat treatment for higher strength and wear resistance, but have relatively lower corrosion resistance compared to austenitic grades.

Q What are duplex stainless steel fasteners best used for?

Duplex stainless steel fasteners (such as grades 2205 and 2507) are best suited for highly demanding environments, including subsea oil and gas pipelines, chemical reactors, marine engineering structures, and nuclear power plant cooling systems. They combine the strength of ferritic steel with the corrosion resistance of austenitic steel, offering superior resistance to chloride stress corrosion cracking and pitting.

Q What standards govern the supply of high-strength stainless steel fasteners?

High-strength stainless steel fasteners are primarily manufactured and supplied in accordance with ISO 3506/1-2020 for austenitic, duplex, and martensitic grades, and ASTM F738M-02 and ASTM A564-2019 for precipitation-hardening stainless steel grades. These standards define mechanical properties, hardness ranges, and dimensional tolerances.

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

The available size range varies by material grade. Austenitic grades A1/A2/A3 at grade 50 cover M1 to M140, while higher-strength grades (80/100) cover M3 to M48 or M6 to M16. Precipitation-hardening grades generally cover M5 to M140. Please refer to the full performance and supply range table above for detailed specifications by grade.

Q Which stainless steel fastener type offers the highest tensile strength?

Precipitation-hardening stainless steel fasteners offer the highest tensile strength among all types. For example, grade S11100 (H900) achieves a tensile strength of 1700 MPa, and S46500 (H950) reaches 1655 MPa. These are significantly higher than standard austenitic or ferritic grades, making them ideal for aerospace, defense, and high-performance engineering applications.

Q Are ferritic stainless steel fasteners suitable for high-temperature applications?

Yes. Ferritic stainless steel fasteners exhibit excellent high-temperature oxidation resistance, with working temperatures reaching up to 800°C. Their low thermal expansion coefficient makes them particularly suitable for automotive exhaust systems (exhaust pipes, mufflers) and other applications where thermal cycling and elevated temperatures are common factors.

Product Detail

China High-Strength Stainless Steel Fasteners, Inconel Bolts - China Suppliers & Factory Exporter, 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 - China Suppliers & Factory Exporter, 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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