Grade 8 Threaded Rod Tensile Strength

Grade 8 is typically provided plain finish only due to the potential risk of hydrogen embrittlement when plated or galvanized.

Grade 8 threaded rod tensile strength.

Astm a354 is the classification for grade 8 threaded rod made of high strength steel quenched and tempered. Grade a headed bolts threaded rods and bent bolts intended for general applications. Note that hangers supporting steam water air or gas piping systems should be able to carry the weight of piping insulation valves and other equipment. As 0 7854 d 0 9743 n squared where d equals nominal diameter in in.

M36 x 3 metre long studding threaded rod. The second figure signifies that the fastener will begin to yield at 80 of the ultimate tensile strength i e. Black oxide steel threaded rods have a dark surface color and are corrosion resistant in dry environments. Ultimate tensile and proof loads for metric bolts according iso 898 1 mechanical properties of fasteners made of carbon steel and alloy steel part 1.

Proof loads and tensile strengths are computed by multiplying the proof load stresses and tensile strengths stresses by the stress area of the thread. In the case of a 8 8 grade bolt the first figure signifies that the tensile strength is at least 800mpa. For technical drawings and 3 d models click on a part number. Strength specifications of stainless steel threaded fasteners.

1 the maximum loads in the table above are based on allowable tensile stress of 12 kpsi reduced by 25 to 9 kpsi allowable stress. Mass and weight the difference. High tensile grade 8 8 fully threaded galvanised studding. For proof load yield and tensile strength values for threaded rod refer online to the astm sae and iso mechanical requirements for steel fasteners chart or the industrial fastener institute website and handbook which can be found in resources.

Grade 8 steel threaded rods are about 25 stronger than medium strength steel rods. Zinc yellow chromate plated steel threaded rods resist corrosion in wet environments. Common finishes include plain black zinc plated and hot dip galvanized for grades 2 and 5. Sae threaded rods do not require permanent grade markings on the ends of the rods like many astm specifications do.

And n equals thread per inch. Threaded rods proof load capacities in metric units. Grade grade 5 astm a193 b7 chromium molybdenum grade 8 heat treated after threading tensile strength 120 000 psi minimum 125 000 psi minimum 1 100 f tempering temp 150 000 psi minimum yield strength 92 000 psi minimum 105 000 psi minimum minimum 130 000 psi minimum rockwell hardness c25 c34read more. Grade b heavy hex bolts and studs intended for flanged joints in piping systems with cast iron flanges.

1 kg 9 81 n. This table shows the mechanical properties of b7 grade 5 and grade 8. Tensile strength ksi min 75 0 113 4 116 8 2 2 0 astm f606 f606m 16 mtm 14.