Patriot Bolt machines ASTM A193 Grade B16 fasteners from certified chromium-molybdenum-vanadium bar for steam and high-temperature service. B16 resists creep and stress relaxation better than B7, so hot joints keep their clamp load longer.
This page brings together the B16 fasteners we make, the B16 property limits by diameter, and how B16 compares with other alloy steel bolting grades.
A193 B16 at a Glance
- Specification
- ASTM A193 / ASME SA193 Grade B16
- Material
- Cr-Mo-V alloy steel, UNS K14072
- Strength
- 125 ksi min tensile, 105 ksi min yield (2-1/2 in and under)
- Service
- Typically up to about 1100 °F
- Matching nut
- A194 Grade 7
- Products
- Stud bolts, heavy hex bolts, nuts
A193 B16 Fasteners We Machine
Choose a product to see its standards and options. Every order ships with mill test reports traceable to the heat.
A193 B16 Stud BoltsFull B16 page
A194 Grade 7 Heavy Hex NutsMatching nut
B16 Heavy Hex BoltsMade in B16A193 B16 Mechanical Properties
| Diameter | Tensile, min | Yield (0.2%), min | Hardness, max |
|---|---|---|---|
| 2-1/2 in and under | 125 ksi | 105 ksi | 321 HBW |
| Over 2-1/2 to 4 in | 110 ksi | 95 ksi | 321 HBW |
| Over 4 to 8 in | 100 ksi | 85 ksi | 321 HBW |
Full chemistry is on the A193 B16 stud bolts page.
B16 vs. Other Alloy Steel Bolting Grades
| Grade | Strength (to 2-1/2 in) | Typical use |
|---|---|---|
| A193 B16 | 125 ksi / 105 ksi | Steam and hot service to about 1100 °F |
| A193 B7 | 125 ksi tensile / 105 ksi yield | General flange bolting to about 800 °F |
| A193 B5 | 100 ksi / 80 ksi | Hot, sulfur-bearing refinery service; matches P5 piping |
Compare all grades in the Fastener Materials Matrix.
A193 B16 Fastener FAQ
What makes B16 different from B7?
B16 adds vanadium and more molybdenum and is tempered at 1200 °F minimum, so it holds strength and clamp load better at high temperature.
Which B16 fasteners does Patriot Bolt make?
We machine B16 stud bolts, heavy hex bolts and nuts, as well as custom parts made to your drawing.
Which nut goes with B16?
A194 Grade 7 heavy hex nuts.
Do B16 fasteners come with certifications?
Yes. Patriot Bolt is ISO 9001:2015 certified, and every B16 order includes mill test reports traceable to the heat and a certificate of conformance to your purchase order.
Request a Quote
Send us the product, size, specification and quantity, or upload your drawing. Call (281) 581-0176 or request a quote.