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Carbon Steel Black Oxide ANSI/ASME B18.2.1 SCM435 Full Thread HEX BOLT
Material: Carbon steel
Finish: Black Oxide
Standard: ANSI
Certification: ISO9001
MOQ:1000PCS
Samples: Free
Place of Origin: Zhejiang China
Product Details
Product Description
Basic Composition
Dimensions and Standards
Technical Parameters
| Product name | ANSI/ASME B18.2.1 SCM435 HEX BOLT |
| Brand | Goshen |
| Place of Origin | Jiaxing, Zhengjiang, China |
| Finish | Dacromet,HDG,BLACK, Zinc Plated or as per require |
| Material | SCM435,as per require |
| Non-standards | OEM is available, according to drawing or samples |
| Samples | Samples are free |
| Package | Bulk in master cartons, then on pallets, or according to customers' requirement |
| Payment | T/T, L/C,or as per require |
| Delivery | 30-40 days |
| SCM435 Chemical Composition(%) | |||||||||
| Grade | C | Mn≤ | P≤ | S≤ | Si≤ | Ni≤ | Cr | Mo | Cu≤ |
| 0.33~0.38 | 0.6-0.9 | 0.03 | 0.030 | 0.15-0.35 | 0.25 | 0.9-1.2 | 0.15-0.3 | 0.3 | |
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Material: Carbon steel, which is relatively inexpensive and widely available, offering good mechanical properties such as tensile strength and ductility. Common material grades include SAE 1006 to 1024 and AISI 1015 to 1045. Carbon steel hex bolts with black oxide finish are often made from carbon steel grades such as 45# or 55# steel.
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Performance Grade: Common grades include 4.8, 5.8, 8.8, 10.9, and 12.9. For example, Grade 8.8 bolts have a minimum tensile strength of 800 MPa and a minimum yield strength of 640 MPa. Grade 10.9 bolts have a minimum tensile strength of 1000 MPa and a minimum yield strength of 900 MPa. Grade 12.9 bolts have a minimum tensile strength of 1200 MPa and a minimum yield strength of 1100 MPa.
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Head Style: Hexagonal head, featuring a regular hexagonal shape that provides a larger contact surface with the workpiece, distributing pressure more evenly and preventing damage. It also allows for easy engagement with wrenches and sockets for convenient installation and removal.
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Surface Treatment: Black oxide finish, which forms a layer of iron oxide (Fe3O4) on the surface of the carbon steel bolt through a chemical reaction. This treatment offers enhanced corrosion resistance, protects the bolt from rust and environmental factors, extends its service life, and provides a sleek, attractive appearance. Compared to other surface treatments like galvanizing, black oxide finish has lower costs and minimal impact on the bolt's mechanical properties.
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Dimensions: Available in various sizes, such as M5, M6, M8, M10, M12, M16, M20, M24, M30, M36, etc. Lengths vary depending on the diameter and application requirements. For example, M8 bolts can range from 12 mm to 150 mm or longer. The head width and thickness also differ, with specific dimensions defined by standards like DIN933. Below are the dimensional specifications for Grade 8.8 DIN933 hex head bolts with black oxide finish:
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Thread Type: Typically uses metric coarse threads or UNC (Unified Coarse Thread), which are widely compatible. Fine threads (UNF) are also available upon request.
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Thread Length: Can be customized, but generally refers to the threaded portion from the underside of the head to the end of the bolt. For some bolts with a partially threaded shank, the thread length corresponds to specific standards.
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Hardness: The hardness of the bolt head and shank varies by performance grade. For example, for Grade 8.8 bolts, the Rockwell hardness of the head is approximately HRC25-34, and the shank hardness is roughly HRC19-26.
