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海鹽全豐緊固件有限公司
海鹽全豐緊固件有限公司
Grade Identification Markings
Grade Identification MarkingSpecificationMaterialNominal Size, In.Proof Load Stress, ksiHardness RockwellSee NoteMinMax
No MarkASTM A563 Grade OCarbon Steel1/4 - 1
Grade Identification Markings
Grade Identification MarkingSpecificationMaterialNominal Size, In.Proof Load Stress, ksiHardness RockwellSee NoteMinMax
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| ASTM A563 Grade O | Carbon Steel | 1/4 - 1-1/2 | 69 | B55 | C32 | 2,3 |
ASTM A563 Grade A | Carbon Steel | 1/4 - 1-1/2 | 90 | B68 | C32 | 2,3 | |
ASTM A563 Grade B | Carbon Steel | 1/4 - 1 | 120 | B69 | C32 | 2,3 | |
>1 - 1-1/2 | 105 | ||||||
| ASTM A563 Grade C | Carbon Steel, may be Quenched and Tempered | 1/4 - 4 | 144 | B78 | C38 | 4 |
| ASTM A563 Grade C3 | Atmospheric Corrosion Resistant Steel, may be Quenched and Tempered | 1/4 - 4 | 144 | B78 | 38 | 4,6 |
| ASTM A563 Grade D | Carbon Steel, may be Quenched and Tempered | 1/4 - 4 | 150 | B84 | C38 | 5 |
| ASTM A563 Grade DH | Carbon Steel, Quenched and Tempered | 1/4 - 4 | 175 | C24 | C38 | 5 |
| ASTM A563 Grade DH3 | Atmospheric Corrosion Resistant Steel, Quenched and Tempered | 1/4 - 4 | 175 | C24 | C38 | 4,6 |
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