* Specifications
  ASTM A 193 B7, B7M, B16
Hardened and Tempered Steel Round Bars
Quenching and Tempered Steel Round Bars

* Characteristics
Alloy-steel and stainless steel bolting materials for high-temperature service, of pressure vessels, valves, flanges, and fittings for high temperature service.
the bars are to be processed  by cold drawing or centerless grinding, austenitic stainless steel bars are to be processed solution- annealed and strain-hardened.
Also Quenched and Tempered or Normalized and tempered ferritie materials that is subsequently cold drawn fir dimensional control shall be stress-relived after cold drawing

* Chemical Composition
Grade C Mn P max S max Si Cr Mo V
B7.B7M 0.37 ‘­0.49 0.65 ‘­1.10 0.035 0.040 0.15 ‘­0.35 0.75 ‘­1.20 0.15 ‘­0.25 0.25
B16 0.36 ‘­0.47 0.45 ‘­0.70 0.035 0.040 0.15 ‘­0.35 0.8 ‘­1.15 0.5 ‘­0.65
‘­0.35

* Mechanical Properties
Grade Dia.(mm)  Minimum
Tempering
 Temp. C
 Tensile
Strength
min. Mpa
Yield
Strength
min. 2%
offset
Mpa
Elongation
in 2inch
min. %
Reduction
of Area
min. %
B7  up to 65 593 860 720 16 50
65.01 ‘­ 100 593 790 655 16 50
 B7M  up to 65 620 690 550 18 50
B16  up to 65 650 860 720 18 50
65.01 ‘­ 100 650 760 655 17 45

* Dimensions
Dia.(mm) Length(M) Dia Tolerance Straightness Shape
8.0-76.2 2.0-7.0 h7, h8, h9 (*) 0.5/1,000 Round, Hexagon,
Square & Flat
        (*) Guarantee h9 in diameter tolerance for Cold Drawn or Smooth Turning 
 

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