| | Grade： | 10B21、10B28、10B33 | | Specifications： | φ5.5～42mm | | Applied Standard： | Q/XG 137 and agreement | | Criteria： | | | Product Glory： | | | Characteristics： | These products are mainly used to produce fasteners of class 8.8 ~10.9, It has of uniform-chemicalcomposition, low percentage of harmful elements, high puruty, slight decarburisation, good surface quality, good cold heading perfomence, low rigidity. They also has characteristics of high intensity and good hardenability after heat treatment. | | The use of products： | The products are mainly used to produce fasteners of class 8.8 ~ 10.9. | | Future Development： | By controlling alloy composition and cooling process, the spheroidize annealing time of wire rod can be shortened or omitted. | |
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