| Material: | Stainless Steel |
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| Type: | Hexagon Head |
| Connection: | Common Bolt |
| Customization: |
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Shipping Cost:
Estimated freight per unit. |
about shipping cost and estimated delivery time. |
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| Payment Method: |
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| Initial Payment Full Payment |
| Currency: | US$ |
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| Return&refunds: | You can apply for a refund up to 30 days after receipt of the products. |
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Suppliers with verified business licenses
Audited Supplier XIAMEN QISHINE
XIAMEN QISHINE IMP. & EXP. Co., Ltd., is a globally recognized and renowned pipeline product supplier specializing in the provision of a wide array of pipeline essentials, from fasteners to gaskets. 
We take pride in catering to a broad range of clientele across various industries and projects worldwide, with a strategic focus on Engineering, Procurement, and Construction (EPC) companies and pipeline construction projects.
We have more than ten years of pipeline product development & sales experience, so we have a wealth of relevant experience and problem solving ability.
The Alloy 31 Bolt is a nitrogenous nickel-chromium-molybdenum fastener designed specifically for the challenging environments of the chemistry and petrochemical industries. Crafted from Alloy 31, a highly corrosion-resistant material, this bolt offers exceptional performance and reliability in harsh conditions.
The Alloy 31 Bolt is composed of UNS N08031, a high-performance alloy known for its excellent resistance to a wide range of corrosive chemicals, acids, and chlorides. This material is also highly resistant to pitting and crevice corrosion, making it an ideal choice for applications in aggressive environments.
Similar brand
| UNS | GB/T | W.Nr | ANSI/ASTM |
| N08031 | NS144 | 1.4562 | Alloy31 |
With a length ranging from 30-800 mm and a size range of M8-M100, the Alloy 31 Bolt offers versatility in various installation scenarios. Its performance class 8.8 guarantees a strength of extension up to 650 N/mm², providing reliable holding power and ensuring the bolt can withstand heavy loads and stress.
One of the key features of the Alloy 31 Bolt is its exceptional corrosion resistance. This bolt exhibits excellent resistance to a wide range of corrosive media, including sulfuric acid, hydrochloric acid, phosphoric acid, and many others. It also maintains its integrity when exposed to high-temperature and high-pressure environments commonly found in the chemistry and petrochemical industries.
Chemical composition of Alloy 31 bolts
| alloy | % | Ni | Cr | Fe | C | Mo | Mn | Si | Cu | P | S | N |
| 31 | Min | 30.0 | 26 | REM | - | 6 | - | - | 1.0 | 0.15 | ||
| Max | 32.0 | 28 | 0.015 | 7 | 2.0 | 0.30 | 1.4 | 0.02 | 0.01 | 0.20 |
The Alloy 31 Bolt is known for its outstanding performance in chemical processing plants, refineries, and other facilities where severe conditions exist. It is commonly used in equipment such as heat exchangers, pressure vessels, pumps, valves, and reactors. This bolt ensures the structural integrity of crucial components, reducing the risk of leaks, failures, and downtime.
Minimum mechanical properties of bolts at room temperature
| Condition | Rm N/mm² |
RP0.2 N/mm² |
A5 % |
| Mechanical Properties | 650 | 350 | 35 |
In addition to its exceptional resistance to corrosion, the Alloy 31 Bolt offers several other advantages. It is easily machined, allowing for efficient installation and maintenance. Its high strength ensures long-term durability and reliability. The bolt's excellent thermal stability makes it suitable for use in both cryogenic and high-temperature applications.
With its superior corrosion resistance and remarkable mechanical properties, the Alloy 31 Bolt is a reliable and cost-effective solution for demanding environments in the chemistry and petrochemical industries. Whether used in chemical processing, oil refining, or other aggressive applications, this bolt provides peace of mind by ensuring the security and longevity of critical infrastructure.
Product Recommendation
Suppliers with verified business licenses
Audited Supplier 
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