This ASTM A354 specification includes stainless and alloy steel fasteners, perfect for use in low temperatures. This grade covers the basics like forged, rolled, hardened screws, bars, studs, bolts, and other fasteners to implement
in several applications.
Below we have mentioned the grades that fall under A354
A354 Grades
| BC |
Chromium, Molybdenum, Alloy Steel Quenched and tempered |
| BD |
AISI 4140/4142 Quenched and tempered |
A354 Mechanical properties
| Grade |
Size |
Tensile ksi, min |
Yield ksi, min |
Elong %, min |
RA % min |
HRC |
| BC |
1/4 to 2-1/2 |
125 |
109 |
16 |
50 |
26-36 |
| Over 2-1/2 |
115 |
99 |
16 |
45 |
22-33 |
| BD |
All Sizes |
150 |
130 |
14 |
40 |
33-38 |
A354 Chemical properties
| Element |
All sizes of grade BD, BC through 2-1/4 diameter |
Grade BD over 2-1/4 |
| Carbon |
0.30 - 0,53 % |
0.35 - 0.53 % |
| Manganese |
0.60 max |
0.60 max |
| Phosphorus, max |
0.035 max |
0.035 max |
| Sulfur, max |
0.040 max |
0.040 max |
| Boron |
0.003 max |
'0.003 max |
| Nickel |
- |
0.4 max |
| Chromium |
- |
0.4 max |
| Molybdenum |
- |
0.15 max |
| Other alloying elements |
- |
- |
A320 Compatible nuts & washers
| Bolt Grade |
Finish |
Nut |
Washers |
| BC |
Plain |
A563C Heavy Hex |
F436 |
| Galvanized |
A563DH Heavy Hex |
F436 |
| BD |
All Finished |
A563DH Heavy Hex |
F436 |
Additional requirements, Grade BD, Diameters above 2-1/4
| charpy impact |
20ft-lbs minimum @ -4F |
| Cross sectional hardness |
Equidistant hardness readings shall be taken across the diameter of the fastener through the threaded section |
