| * Specifications ASTM A 193 B7, B7M, B16Hardened and Tempered Steel Round BarsQuenching 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 issubsequently 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 TensileStrengthmin. Mpa Yield Strengthmin. 2%offsetMpa Elongationin 2inchmin. % Reductionof Areamin. % 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 | 
