ASTM A193 B7 B7m L7 4140 Qt Steel Round Bar for High Strength Bolts

• Type: Alloy Steel Bar
• Standard: AISI, ASTM, GB, JIS, DIN, BS
• Technique: Q&T(Quenched and Tempered)
• Application: Structural Steel Bar, Tool Steel Bar, Die Steel Bar
• Surface Treatment: Balck Oiled
• Alloy: Alloy
• Model NO.: ASTM A193 b7 B7M L7
• Special Use: Mold Steel, Free Cutting Steel, Cold Heading Steel
• Grade: ASTM A193 B7
• Raw Material: AISI 4140
• Condition: Hot Rolled/ Cold Drawn+Qt
• Delivery Condition: Quenched and Tempered
• ASTM A193 B7 Steel Round Bar: for Threaded Rod, Anchor Bolts, U Bolts
• Company: Laiwu Xincheng Metal Co., Ltd
• Report: Strength Report, Mtc, ISO
• Quality: Ut Sep 1921 C/C
• Specifications: ASTM A193 B7
• Property According to: ASTM A193 B7
• Size of Hot Rolled+Qt: 16-120mm
• Sizes for Cold Drawmn and Qt: 5-100mm
• Qt Condition: ASTM A193 B7 Property
• ASTM A193 B7 Hardness: Max 35HRC
• ASTM A193 B7 in China: ASTM A193 B7 Steel Round Bar Export
• Transport Package: Standard Export Packing
• Specification: M12-M310
• Trademark: Laiwu Xincheng
• Origin: China
• HS Code: 72283090
• Production Capacity: 3000tons/Month

Product Description

ASTM A193 b7 B7M L7 4140 QT steel round bar for high strength bolts 
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.










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