China B7 4140 5140 Gr10.9 Steel Bar for High Tensile Bolts

ASTM A193 B7 4140 GR10.9 QT steel bar for high strength bolts Alloy Steel ASTM A193 Grade B7 Round Bars
QT steel bar B7 Used in the manufacture of shafts, connecting rods, gears and bolts
Harden ability is better, High overall mechanical properties, good low temperature impact toughness, low notch sensitivity, with temper brittleness
Process for Steel round bar
Blast Furnance→ Molten Iron Pretreatment→Converter→LF→VD/RH→ContinuousCasting→Hot Rolling(KOCKS)→ Heat Treatment→ UT Inspection→Finish Product
EAF→LF→VD/RH→ Continuous Casting→Hot Rolling(KOCKS)→ Heat Treatment→ UT Inspection→ Finish Product.
ASTM A193 Gr.B7 Cold drawn steel bar Typical applications
Fastners,high strength bolts&nuts,thread rods
Astm A193 B7/aisi4140/sae4140 steel Chemical composition

CSiMnPSCrMo0.37-0.480.15-0.350.7-1.10Max0.03Max0.030.75-1.200.15-0.25

Typical properties of AISI / SAE 4140 Steel Q&T to ASTM A193 B7

DiaMin TemperatureTensile Strength(Mpa)Yield Strength(Mpa)ElongationReduction of AreaHardnessBelow 65mm593ºC860720165035HRC65-100mm593ºC795655165035HRC100-160mm593ºC690510185029HRC

ASTM A193 B7 4140 STEEL BAR Delivery condition :
Hot rolled
Hot rolled+Q&T(Quenched and tempered)
Hot rolled+Annealed+Cold Drawn
Hot rolled+Annealed+Cold Drawn+Q&T(Quenched and tempered)
Hot rolled+Annealed+Peeled+Q&T(Quenched and tempered)
A193 Grade B7 Class Bolts are manufactured from AISI 4140/4142 low Carbon Alloy Steel Grades followed by quencing & tempering. We manufacture these Bolts with great precision & Quality. These grade bolts are also denoted as Grade 7 Bolts,B7 Bolts etc. We Also offer B7 Studs/B7 threaded bars/B7 Threaded rods.TorqBolt Stocks & Supply these Bolt Fasteners in various sizes & Coatings.
For quick Quote on A193 Grade B7 Bolts/Studs, please contact our Salesteam.
Related keywords for ASTM A93 B7 Bolts : A193 B7 Bolts,Grade B7 Bolts,A193 Grade B7,SA 193 B7 bolts,B7 Studs,B7 Studs Material,B7 Threaded Rod,B7 Threaded Bar etc