Steel Pipes,Bars, Shaped



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/td> 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