Custom High-Strength Stainless Steel Fasteners Inconel Bolts from China Suppliers and Factory Supplier, Exporter

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Custom High-Strength Stainless Steel Fasteners Inconel Bolts from China Suppliers and Factory Supplier, Exporter

Stainless steel high-strength fasteners are essential components in various industries, known for their superior strength and excellent corrosion resistance. Manufactured from high-quality stainless steel, these fasteners are designed to endure heavy loads and perform reliably in harsh environments. Our products include an extensive range of options such as authentic 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 ensure that our fasteners meet international standards to deliver outstanding performance and durability. Choose our stainless steel high-strength fasteners for your next project and experience the quality and reliability that set us apart in the marketplace

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Product Description

Austenitic Stainless Steel High-Strength Fasteners

🔬Composition

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

⚙️Characteristics

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

📌 Key Applications

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.
Chemical and Energy Equipment: Used in reaction vessels, pipelines, storage tanks — resistant to corrosive media such as acids, alkalis, and salts. In petroleum and natural gas, it manufactures corrosion-resistant components such as valves and pump shafts; 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 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%). Common grades: 410 and 420.

⚙️Characteristics

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

📌 Key Applications

Medical Devices & Surgical Instruments: Scissors, forceps, surgical knives, etc., must meet requirements of high hardness and corrosion resistance.
Industrial Cutting Tools & Mechanical Components: Food processing tools — e.g., 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. Common grades: 430 and 446.

⚙️Characteristics

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

📌 Key Applications

Automobile Industry — Exhaust System: Exhaust pipes, mufflers, etc., utilize high-temperature oxidation resistance (working temperature up to 800°C) and low thermal expansion coefficient.
Appliances & Kitchenware: Refrigerator door handles, microwave oven shells, etc., meeting requirements of durability and cleanliness.
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

🔬Composition

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

⚙️Characteristics

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

📌 Key Applications

Petroleum & Natural Gas — Subsea Pipelines: Duplex stainless steel (e.g., 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. Suitable for oil and gas extraction, storage and transportation equipment, 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 & 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

* All data comply with the referenced executive standards. Supply range is subject to confirmation with manufacturer.

Frequently Asked Questions (FAQ)

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

There are four main types: Austenitic (e.g., 304, 316), Martensitic (e.g., 410, 420), Ferritic (e.g., 430, 446), and Duplex stainless steel (e.g., 2205, 2507). Each type offers distinct mechanical and corrosion-resistance properties suited for different application environments.

QWhat is the difference between austenitic and martensitic stainless steel fasteners?

Austenitic stainless steel fasteners are non-magnetic, offer excellent corrosion resistance and toughness, and are easy to weld and process. Martensitic stainless steel fasteners are magnetic, can be hardened through heat treatment for higher strength and wear resistance, but have relatively lower corrosion resistance compared to austenitic types.

QWhich stainless steel fastener type is best for marine or offshore environments?

Duplex stainless steel fasteners (such as grades 2205 and 2507) are the best choice for marine and offshore environments. They offer superior resistance to chloride stress corrosion cracking (Cl-SCC), excellent pitting corrosion resistance, and high mechanical strength — all critical for subsea pipelines, marine platforms, and seawater desalination systems.

QWhat executive standards govern stainless steel high-strength fasteners?

The primary standards are ISO 3506/1-2020 (covering austenitic, duplex, and martensitic grades) and ASTM F738M-02 / ASTM A564-2019 (covering precipitation-hardening grades). These standards define mechanical properties including tensile strength, yield strength, elongation, and hardness ranges.

QWhat is precipitation-hardening stainless steel and what are its advantages for fasteners?

Precipitation-hardening (PH) stainless steel, such as S17400 and S11100, achieves very high strength through a controlled aging heat treatment process. PH stainless steel fasteners combine high tensile strength (up to 1700 MPa), good corrosion resistance, and reasonable ductility — making them ideal for aerospace, defense, and high-performance industrial applications where both strength and corrosion resistance are critical.

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

The supply range varies by material type and grade. Austenitic grades (A1–A3) are available from M1 to M140, while some specialized grades such as A4/A5 grade 100 are available from M6 to M16. Martensitic grades cover M1 to M140, and precipitation-hardening grades typically range from M5 to M140. Please refer to the performance table above for specific grade-by-grade supply ranges.

Product Detail

Custom High-Strength Stainless Steel Fasteners Inconel Bolts from China Suppliers and Factory Supplier, Exporter

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

Related Products

Product Detail

Custom High-Strength Stainless Steel Fasteners Inconel Bolts from China Suppliers and Factory Supplier, Exporter

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

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