Bolting Materials

By Rob Siegwart
Category: Engineering Reference
Tags: bolting material data

SAE

Grade Material Size Range, in Min UTS, ksi Min Yield, ksi Min Proof, ksi
1 Low or medium-carbon 1/4 - 1 1/2 60 36 33
2 Low or medium-carbon 1/4 - 3/4 74 57 55
7/8 - 1 1/2 60 36 33
4 Medium-carbon, cold drawn 1/4 - 1 1/2 115 100 65
5 Medium-carbon, Q&T 1/4 - 1 120 92 85
1 1/8 - 1 1/2 150 81 74
5.2 Low-carbon martensite, Q&T 1/4 - 1 120 92 85
7 Medium-carbon allow, Q&T 1/4 - 1 1/2 133 115 105
8 Medium-carbon allow, Q&T 1/4 - 1 1/2 150 130 120
8.2 Low-carbon martensite, Q&T 1/4 - 1 150 130 120

ASTM

Class Material Size Range, in Min UTS, ksi Min Yield, ksi Min Proof, ksi
A307 Low-carbon 1/4 - 1 1/2 60 36 33
A325, type 1* Medium-carbon, Q&T 1/2 - 1 120 92 85
1 1/8 - 1 1/2 105 81 74
A325, type 2* Medium-carbon, Q&T 1/2 - 1 120 92 85
1 1/8 - 1 1/2 105 81 74
A325, type 3* Weathering steel, Q&T 1/2 - 1 120 92 85
1 1/8 - 1 1/2 105 81 74
A354, Gr BC Alloy steel, Q&T 1/2 - 2 1/2 125 109 105
A354, Gr BD Alloy steel, Q&T 1/4 - 4 150 130 120
A449 Medium-carbon, Q&T 1/4 - 1 120 92 85
1 1/8 - 1 1/2 105 81 74
1 3/4 - 3 90 58 55
A490 Typ. 1* Alloy steel, Q&T 150 130 120

* Standards A325 and A490 were withdrawn by ASTM in 2016 and replaced by ASTM F3125.