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

• Type: Round Bar or Hex Steel Bar
• Standard: AISI, ASTM, DIN, JIS
• Composition: Ferrous Steel Scrap
• Technique: Cold Drawn
• Shape: Bar
• Surface Treatment: Polished
• Model NO.: alloy steel bar
• Special Use: Cold Heading Steel
• Application: Structural Steel Bar
• Grade: ASTM A193 B7 B16 4140 5140 42CrMo
• Material: Alloy Steel Bar
• Surface: Smooth Surface or Black Surface
• Usage: Bolts and Nuts
• Main Shape: Round Bar and Hex Steel Bar
• Transport Package: Anti-Rust Packaging
• Specification: 5-200mm
• Trademark: dajin
• Origin: China
• Production Capacity: 3000

Product Description

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

C	Si	Mn	P	S	Cr	Mo
0.37-0.48	0.15-0.35	0.7-1.10	Max0.03	Max0.03	0.75-1.20	0.15-0.25

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

Dia	Min Temperature	Tensile Strength(Mpa)	Yield Strength(Mpa)	Elongation	Reduction of Area	Hardness
Below 65mm	593ºC	860	720	16	50	35HRC
65-100mm	593ºC	795	655	16	50	35HRC
100-160mm	593ºC	690	510	18	50	29HRC

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