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B16 Alloy Steel Bar - B5F5B - ASTM A 193

B16 alloy steel bar is a chromium, molybdenum, vanadium alloy steel widely used for high strength industrial applications. It is commonly used in power generation turbines in high strength fastener applications such as bolt material.

  • B-16 Alloy Steel
    B-16 Alloy Steel

B-16 Alloy Steel Bar

Standard Inventory Specifications

  • ASTM A 193 Gr B16  (w/ supplement of S2 charpy impact test)
  • S6 stress relieving by AOD-ESR melt
  • B5F5
  • EN 10204
  • Hot worked, solution treated (annealed), then descaled

Common Trade Names

  • B16 alloy, B16, B16 bolt material

Inventory Size Range

  • Bar : 1.000" - 7.000"

Please contact us for more details.

The technical data provided is for information only and not for design purposes. It is not warranted or guaranteed.

Chemical Composition of B16 Alloy Steel

Element Percent By Weight
C Carbon 0.42 - 0.50%
Cr Chromium 0.80 - 1.15%
Mn Manganese 0.45 - 0.70%
Mo Molybdenum 0.45 - 0.65%
P Phosphorous 0.025% max (bars)
V Vanadium 0.25 - 0.35%
S Sulfur 0.025% max (bars)
Al Aluminum 0.015% max
Si Silicon 0.20 - 0.35%

Common Applications

  • Power Generation 
  • Bolting

Physical Properties of B16 Alloy Steel

  • B16 alloy is typically hardened by oil quenching and tempering after the part has reached room temperature 
  • In diameters over 7” water quenching may be used to meet Charpy impact properties
  • Density = 0.283 (lb/cu. In.) 


Mechanical Properties of B16 Alloy Steel


  • Generally, B16 alloy steel bar is supplied in the quenched and tempered condition where the hardness is normally Rc 35-43. In the annealed condition, hardness is typically 187 BHN.


  • Generally supplied in the quenched and tempered condition, machinability is similar to standard AISI alloys such as 4340.


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