High-Strength Stainless Steel Fasteners Inconel Bolts - China Suppliers & Factory
Austenitic Stainless Steel High-Strength Fasteners
Mainly contains chromium (16–26%) and nickel (6–22%). Common grades: 304 and 316.
Strong corrosion resistance, non-magnetic, good toughness, easy to process, and excellent welding performance.
- 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 less likely to contaminate food.
- Chemical & Energy Equipment: Used in reaction vessels, pipelines, storage tanks — resistant to acids, alkalis, and salts. In petroleum and natural gas: manufacturing corrosion-resistant valves and pump shafts; S20910 stainless steel is suitable for high-temperature and high-pressure environments.
- Architecture & Decoration: Used for exterior walls, railings, and roofs — combining both beauty and durability.
- Transportation — Automotive: 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 for high strength and high-temperature resistance.
Martensitic Stainless Steel High-Strength Fasteners
Contains chromium (12–18%) and carbon (0.1–1.2%). Common grades: 410 and 420.
Strength and hardness enhanced through heat treatment, good wear resistance, relatively weak corrosion resistance, and magnetic.
- Medical Devices & Surgical Instruments: Scissors, forceps, surgical knives — 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 Cl⁻ corrosion resistance 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
Contains chromium (10.5–30%), low carbon content. Common grades: 430 and 446.
Excellent corrosion resistance (especially against stress corrosion), magnetic, medium strength, average welding performance.
- Automobile Industry — Exhaust System: Exhaust pipes, mufflers — utilizing high-temperature oxidation resistance (up to 800°C) and low thermal expansion coefficient.
- Appliances & Kitchenware: Refrigerator door handles, microwave oven shells — 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
Contains chromium (18–28%), nickel (4.5–8%), and molybdenum (2.5–4%). Common grades: 2205 and 2507.
Combines advantages of austenite and ferrite — high strength, excellent corrosion resistance, strong resistance to stress corrosion and pitting corrosion.
- Petroleum & Natural Gas — Subsea Pipelines: S31803 is used for subsea pipelines, valves, and pump bodies. Its resistance to chloride stress corrosion cracking (Cl-SCC) is superior to austenitic stainless steel. Suitable for oil/gas extraction, storage and transportation equipment.
- Chemical & Environmental Protection Equipment: Reactors and heat exchangers in contact with acidic media (acetic acid, formic acid) — 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 |
|||
HV |
HRC |
HBW |
||||||||||
Austenitic |
A1 |
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 |
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 |
D2 |
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 |
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 |
|
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 |
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 |
|