Custom High-Strength Stainless Steel Fasteners Inconel Bolts - Trusted China Suppliers and Factory for Quality Solutions Suppliers, Product

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Custom High-Strength Stainless Steel Fasteners Inconel Bolts - Trusted China Suppliers and Factory for Quality Solutions Suppliers, Product

High-strength stainless steel fasteners are essential components crafted from premium stainless steel materials, offering superior strength and excellent corrosion resistance. These fasteners are ideal for demanding applications that require reliability under heavy loads and exposure to harsh environments. Our product range includes authentic stainless steel high-strength fasteners, martensitic stainless steel variants, ferritic stainless steel options, and duplex stainless steel fasteners. As a leading supplier and factory in China, we ensure that our high-strength fasteners meet the highest quality standards to support your engineering needs. Discover durable solutions with our stainless steel fasteners, designed to perform exceptionally in various applications

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Product Description

Austenitic Stainless Steel High-Strength Fasteners

⚗️ Composition

Mainly contains chromium (16–26%) and nickel (6–22%).
304316

✅ Characteristics

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

🔩 Applications

🍽️ Food Processing & Kitchenware: Austenitic stainless steel (such as 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.
🏭 Chemical and Energy Equipment: Used in reaction vessels, pipelines, storage tanks, etc., resistant to corrosive media such as acids, alkalis, and salts. In 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.
🏗️ Architecture and Decoration: Used for exterior walls, railings, roofs, etc., combining both beauty and durability.
🚗 Transportation – Automobile: SUS301 is used for body structure components and exhaust pipes, achieving both lightweight and high strength.
✈️ Transportation – Aerospace: Materials such as S20910 are used for engine parts and fasteners, meeting the requirements of high strength and high temperature resistance.

Martensitic Stainless Steel High-Strength Fasteners

⚗️ Composition

Contains chromium (12–18%) and carbon (0.1–1.2%).
410420

✅ 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: Such as scissors, forceps, surgical knives, etc., must meet the requirements of high hardness and corrosion resistance.
⚙️ Industrial Cutting Tools & Mechanical Components: Food processing tools — for instance, Z30Cr13 martensitic stainless steel tools have superior corrosion resistance to Cl⁻ compared to 420J2.
🚀 Aerospace and Defense: Used for missile casings, engine parts, etc., to meet requirements for high strength and corrosion resistance.

Ferritic Stainless Steel High-Strength Fasteners

⚗️ Composition

Contains chromium (10.5–30%), low carbon content.
430446

✅ Characteristics

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

🔩 Applications

🚗 Automobile Industry – Exhaust System: Exhaust pipes, mufflers, etc., utilizing high-temperature oxidation resistance (working temperature up to 800℃) and low thermal expansion coefficient.
🏠 Appliances & Kitchenware: Refrigerator door handles, microwave oven shells, etc., meeting the requirements of durability and cleanliness.
🏭 Commercial Installation – Chemical Containers: Used for corrosion-resistant linings or pipelines. For instance, the 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%).
22052507

✅ Characteristics

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

🔩 Applications

🛢️ Petroleum & Natural Gas Industry: Duplex stainless steel (such as S31803) is used to manufacture subsea pipelines, valves and pump bodies. Its resistance to chloride stress corrosion cracking (Cl-SCC) is superior to austenitic stainless steel. Also suitable for equipment used in oil and gas extraction, storage and transportation, such as coolers for hydrogenation reactor effluent.
🧪 Chemical & Environmental Protection Equipment: Reactors and heat exchangers in contact with acidic media (acetic acid, formic acid) with outstanding resistance to local corrosion. Also used in flue gas desulfurization systems, resistant to sulfur and chloride ion environments.
🌊 Ocean Engineering: Vessels and propellers resistant to seawater corrosion, suitable for marine platform components and high-pressure pipelines for seawater desalination.
⚡ Architecture and Energy – Nuclear Power: Used in key facilities such as 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)

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

The main types include Austenitic (e.g., grades A1–A8, 304, 316), Martensitic (e.g., grades C1, C3, C4, 410, 420), Ferritic (e.g., 430, 446), Duplex (e.g., grades D2–D8, 2205, 2507), and Precipitation-Hardening stainless steels (e.g., S17400, S46500). Each type offers different balances of strength, corrosion resistance, and magnetic properties.

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

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

❓Which stainless steel fastener type is best for marine and offshore applications?

Duplex stainless steel fasteners (such as grades 2205 and 2507) are best suited for marine and offshore environments. They offer superior resistance to chloride stress corrosion cracking (Cl-SCC) and pitting corrosion compared to standard austenitic grades, making them ideal for subsea pipelines, marine platforms, and seawater desalination systems.

❓What standards govern the performance of stainless steel high-strength fasteners?

Stainless steel high-strength fasteners are primarily governed by ISO 3506/1-2020 for austenitic, duplex, martensitic, and ferritic grades. Precipitation-hardening grades follow ASTM A564-2019 and ASTM F738M-02. These standards define mechanical properties including tensile strength, yield strength, elongation, and hardness ranges.

❓What is precipitation-hardening stainless steel and why is it used for fasteners?

Precipitation-hardening (PH) stainless steel is a special class that achieves very high strength through a heat treatment process called aging, in addition to the hardening from its alloy composition. Grades such as S17400, S46500, and XM-16 can achieve tensile strengths exceeding 1600 MPa. They are used for fasteners in demanding aerospace, defense, and high-performance industrial applications where both very high strength and good corrosion resistance are required.

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

The available size range varies by material type and grade. Generally, austenitic grades (A1–A3, A4–A5) cover M1 to M140, while grades with higher strength levels (grade 80, 100) are available from M3 to M48 or M3 to M64. Martensitic and precipitation-hardening grades typically range from M1 or M5 up to M140, with some high-strength grades available from M6 to M64. Please refer to the supply range table above for specific details per grade.

Product Detail

Custom High-Strength Stainless Steel Fasteners Inconel Bolts - Trusted China Suppliers and Factory for Quality Solutions Suppliers, Product

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

Custom High-Strength Stainless Steel Fasteners Inconel Bolts - Trusted China Suppliers and Factory for Quality Solutions Suppliers, Product

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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