T/CIPR 071-2022 Active Group standards

T/CIPR 071-2022 Mechanical properties of fasteners grade 14.9 for bolts, screws, and studs

Publish Date: 2022-11-17 Implement Date: 2022-12-01 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

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Basic Information

Standard Code: T/CIPR 071-2022

Standard Type: Group standards

Standard Status: Active

is_force_gb: no

CCS Name: -

ICS Name: Bolts, screws, and studs

Publish Date: 2022-11-17

Implement Date: 2022-12-01

Scope

Scope: This document specifies the product structure, basic requirements, technical requirements, mechanical properties, inspection classification, marking, packaging, storage and transportation, and quality commitments of Class 14.9 fasteners, including bolts, screws, and studs (hereinafter referred to as bolts). This document applies to the production, inspection, and acceptance of Class 14.9 fasteners, including bolts, screws, and studs (hereinafter referred to as bolts). Special requirements shall be implemented in accordance with the contract. Main technical contents: 1. The product hardness ≥ HRC40, and the average bearing capacity of each bolt in the M22X1.5 Beiben/Dali Shen series exceeds 3 tons for Class 14.9 bolts. 2. The product strength ≥ 1,300 MPa, exceeding 80 MPa for Class 14.9 bolts. 3. The average reduction in diameter of the fracture cross-section of the product exceeds 3.5 mm, which is more than 1 mm higher than that of ordinary Class 14.9 products. It has good toughness and is less prone to bolt fracture. 4. The thread surface has no decarburization, ensuring that customers are less likely to experience thread slippage when using impact wrenches. 5. The thread of the nut is close to full thread, and after being matched with the bolt, it can effectively prevent the bolt from being elongated.