Meeting B8M Class 2 specifications, our 316B stainless steel bars and threaded rods deliver exceptional performance in demanding marine and chemical processing environments. This premium austenitic grade combines superior corrosion resistance with enhanced mechanical properties, making it especially suited for marine environments and chemical processing applications. Our 316B stainless steel bars feature excellent performance characteristics with added molybdenum to increase corrosion resistance and mechanical properties. Available in precision ground round bar and threaded rod configurations, these products excel in applications where standard 316 stainless steel's properties would be insufficient.
Available Forms
- Round Bar: Precision ground and polished finish
- Threaded Rod: Full-length threading with consistent pitch and profile
Technical Specifications
Chemical Composition (Nominal)
- Carbon: 0.030 - 0.080%
- Chromium: 16.0-18.0%
- Nickel: 10.0-14.0%
- Molybdenum: 2.0-3.0%
- Manganese: 2.0%
- Silicon: 1.00%
- Sulfur: 0.030%
Mechanical Properties (Class 2)
- Minimum Tensile Strength: 110,000 psi
- Minimum Yield Strength: 95,000 psi
- Elongation in 2 inches: 15% min
- Reduction of Area: 45% min
- Hardness: 321 HBW or 35 HRC max
Common Applications
- Pump shafts and mechanical seals
- Heat exchangers and ball valves
- Chemical processing equipment
- Pollution control equipment
- Marine and offshore equipment
Key Features & Benefits
- Superior corrosion resistance with added molybdenum content
- High strength achieved through strain hardening
- Excellent resistance to pitting and crevice corrosion
- Non-magnetic when annealed
- Excellent mechanical properties at both high and low temperatures
Quality Standards
All products are manufactured in accordance with:
- ASTM A276/A276M - Standard Specification for Stainless Steel Bars and Shapes
- ASTM A479/A479M - Standard Specification for Stainless Steel Bars and Shapes for Use in Boilers and Other Pressure Vessels
- ASTM A182 - Standard Specification for Forged or Rolled Alloy and Stainless Steel Pipe Flanges
316 Condition B (B8M CLASS 2) Mechanical Properties
Heat Treatment: Carbide solution treated and strain hardened
| Diameter (inches) | Tensile Strength (min) | Yield Strength (min) | Elongation in 4D | Reduction of Area | Hardness |
|---|---|---|---|---|---|
| ¾ and under | 110 ksi | 95 ksi | 15% | 45% | 321 HBW or 35 HRC |
| over ¾ to 1 | 100 ksi | 80 ksi | 20% | 45% | 321 HBW or 35 HRC |
| over 1 to 1¼ | 95 ksi | 65 ksi | 25% | 45% | 321 HBW or 35 HRC |
| over 1¼ to 1½ | 90 ksi | 50 ksi | 30% | 45% | 321 HBW or 35 HRC |
Notes:
- Properties shown are minimums except for hardness (maximum)
- Center (core) properties may be lower than indicated by test reports which are based on values determined at ½ radius for diameters 1½" and over
- For sizes ¾ in. in diameter and smaller, a maximum hardness of 241 HBW (100 HRB) is permitted
- Austenitic steels in the strain-hardened condition may not show uniform properties throughout the section particularly in sizes over ¾ in. in diameter
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