Grade B16
Other Names
Corresponding Standard ASTM A193/A193M-2001
Standard Specification for Alloy-Steel and Stainless Steel Bolting Materials for High-Temperature Servise
Classification Alloy Steel
Properties High-Temperature Resistance Good Machinability
B16 Chemical Element Composition Content (%)
Component C Si Mn P S Cr Mo V Al
Minimum Value 0.36 0.15 0.45 - - 0.8 0.5 0.25 -
Maximum Value 0.47 0.35 0.7 0.035 0.04 1.15 0.65 0.35 0.015
Note: The intentional addition of Bi, Se, Te, and Pb is not permitted.
B16 Mechanical Properties
diameter
d
mm
Heat Treatment or Condition
Tensile Strength
σb
Mpa
Specified Plastic Yield Strength
Rp0.2
Mpa
Elongation or Extension Rate
δ
%
Reduction of Area
ψ
%
Hardness
HBW
d≤M64 Tempering ≥860 ≥725 ≥18 ≥50 ≤321
M64<d≤M100 Tempering ≥760 ≥655 ≥17 ≥45 ≤321
M100<d≤M180 Tempering ≥690 ≥586 ≥16 ≥45 ≤321
New and Old Grade Replacement List
Corresponding Standard Grade
ASTM A193/A193M-2001
Grade
Other Name
ASTM A193/A193M-2019
Grade
Other Name
Approximate Comparison Table Steel for Cold Heading and Cold Extrusion
China United States
GB ASTM
ML42CrMoV B16

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