• SAE 5140 SAE 4140 Gr. 8.8 ASTM A193 B7 Quenched and Tempered Steel Round Bar / Qt Steel Round Bar
  • SAE 5140 SAE 4140 Gr. 8.8 ASTM A193 B7 Quenched and Tempered Steel Round Bar / Qt Steel Round Bar
  • SAE 5140 SAE 4140 Gr. 8.8 ASTM A193 B7 Quenched and Tempered Steel Round Bar / Qt Steel Round Bar
  • SAE 5140 SAE 4140 Gr. 8.8 ASTM A193 B7 Quenched and Tempered Steel Round Bar / Qt Steel Round Bar
  • SAE 5140 SAE 4140 Gr. 8.8 ASTM A193 B7 Quenched and Tempered Steel Round Bar / Qt Steel Round Bar
  • SAE 5140 SAE 4140 Gr. 8.8 ASTM A193 B7 Quenched and Tempered Steel Round Bar / Qt Steel Round Bar

SAE 5140 SAE 4140 Gr. 8.8 ASTM A193 B7 Quenched and Tempered Steel Round Bar / Qt Steel Round Bar

Type: Alloy Steel Bar
Standard: AISI, GB, JIS, DIN, BS
Technique: Quenched and Tempered
Application: Structural Steel Bar, Tool Steel Bar, Die Steel Bar
Surface Treatment: Oiled
Alloy: Alloy
Samples:
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Customization:
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Basic Info.

Model NO.
SAE 5140 SAE 4140 Gr. 8.8 ASTM A193 B7
Special Use
High Tensile Bolts
Grade
SAE 5140 SAE 4140 Gr.8.8 ASTM A193 B7
MOQ
2 Tons
Processing
Quenched and Tempered
Transport Package
Standard Sea Worthy
Specification
5mm to 310mm
Origin
China
HS Code
72283090
Production Capacity
3000tons/Month

Product Description

a193 gr b7 quenching and tempering alloy steel round bar /a193 b7 QT steel
A193 gr b7 cold drawn / peeled qt steel round bars for Stud bolts
ASTM A193 B7 Cold Drawn and QT pitch diameter steel round bar
ASTM A193 B7 SAE 4140 QT steel for high strength bolts, threaded rods.


1.ASTM A193 B7 Steel Round Bar
ASTM A193 Grade B7 bolts and threaded studs are manufactured from a chromium-molybdenum steel (AISI 4140) and are quenched and tempered (heat treated) to develop the desired mechanical properties (strength).

2.ASTM A193 Steel Bar Condition ,Size and applications 
Delivery condition Size Tolerance Application
Hot rolled+QT 16-120mm by standard For Anchor bolts, U bolts, etc
Cold Drawn+QT 5mm to 100mm h9 h10 h11 For Threaded rod,stud bolts, etc
Peeled+QT 20mm-120mm h9 h10 h11 For Threaded rod,stud bolts, etc

3.ASTM A193 B7 Steel / AISI 4140 Chemical composition
lement Content
Carbon, C 0.380 - 0.430 %
Chromium, Cr 0.80 - 1.10 %
Iron, Fe 96.785 - 97.77 % (As remainder)
Manganese, Mn 0.75 - 1.0 %
Molybdenum, Mo 0.15 - 0.25 %
Phosphorous, P ≤ 0.035 %
Silicon, Si 0.15 - 0.30 %
Sulfur, S ≤ 0.040 %

4.ASTM A193 B7 Mechanical property (QT condition)


Dia

Minimum temperature

Tensile strength

Yield strength

Elongation

Reduction of area

Hardness

Below 65mm

593 ° C

860

720

16

50

35 HRC

65mm to 100mm

593 ° C

795

655

16

50

35 HRC

100mm to 160mm

593 ° C

690

510

18

50

29 HRC

5.ASTM A193 B7 Steel Bar applications:
ASTM A193 B7 Threaded Rod,Ahchor Bolts, Stud Bolts, U-Bolts, Hex Bolts, J Bolts for oil&gas industries ,wind power projects and enginnering projects and so on.

6.Advantages of our A193 B7 QT steel round bars
1.QT to be finished by Medium frequency continuous tempering furnace
2.Good straitness :Max 1mm/m for hot rolled + QT bars and 0.5mm/m for cold drawn +QT bars
3.Smooth surface from any scales and cracks
4.Uniform microstructure 
5.Good mechanical property 
6.Full set of Strength report and MTC to be traced

7.A193 B7 QT steel round bars Packing details
Packing: Surface oiled - plastic firm -Anti water Woven Cloth
Label Marking heat no., sizes, length, pcs, weight ,origin and so on.
Weight per bundle: About 1 tons or as required

8.Inspection:
We company have good QC inspection tear and full set of inspect equipment including: UT test machine, Tensile testing machine,Hardness testing machine,Dimensional measuring instrument,f,spectrometer,Metallographic microscope and so on, so that we can always supply good mateterials for various projects and industries .
 

9.Payment term: TT or LC/

10.Delivery condition : 7-30 days upon to the detailed order.

11.Free Sample applied.

SAE 5140 SAE 4140 Gr. 8.8 ASTM A193 B7 Quenched and Tempered Steel Round Bar / Qt Steel Round Bar
SAE 5140 SAE 4140 Gr. 8.8 ASTM A193 B7 Quenched and Tempered Steel Round Bar / Qt Steel Round Bar
SAE 5140 SAE 4140 Gr. 8.8 ASTM A193 B7 Quenched and Tempered Steel Round Bar / Qt Steel Round Bar
SAE 5140 SAE 4140 Gr. 8.8 ASTM A193 B7 Quenched and Tempered Steel Round Bar / Qt Steel Round Bar
SAE 5140 SAE 4140 Gr. 8.8 ASTM A193 B7 Quenched and Tempered Steel Round Bar / Qt Steel Round Bar

 

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