astm a193 b7 alloy steel round bars for threaded rod and anchor bolts
ASTM A193 is alloy steel bolting material for pressure vessels, valves, flanges, and fittings for high temperature or high pressure service, or other special purpose applications.
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Material according to ASTM A193 B7 is often available in national coarse (UNC) thread pitches, if being used in traditional applications, threads are specified 8 threads per inch (tpi) for diameters above one inch.
We company can produce and supply ASTM A193 B7 steel round bars as raw material for threaded rod, anchor bolts, stub bolts and so on. We use AISI 4140 steel as raw material, and can do futhur processing such as cold drawn ,peeled ,Quenched and tempered , packing and cutting to get the perfect property ,and good size tolerance , so that customer can save time and cost during threading.
Our main grades for fasteners are : Gr.8.8/40Cr, ASTM A193 B7,B7M,B16, and so on.
1.Raw material 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 % |
2.Property of ASTM A193 B7 (QT)
| Grade |
Size |
Tensile ksi, min |
Yield, ksi, min |
Elong, %, min |
RA % min |
| B7 |
Up to 2-1/2 |
125 |
105 |
16 |
50 |
| 2-5/8 - 4 |
115 |
95 |
16 |
50 |
| 4-1/8 - 7 |
100 |
75 |
18 |
50 |
3.Quality control:
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 , if you have any need for our producrs,please contact us freely.
4.Raw material quality:Quality control
1.Processing Line:
Iron - hot metal pretreatment - Converter - Refining --VD / RH- - Continuous Casting - Hot Rolling (KOCKS) - heat --UT Check - Processing and Distribution Center
Electric Furnace - Refining --VD / RH- - Continuous Casting - Hot Rolling (KOCKS) - heat --UT Check - Processing and Distribution Center
2.Gas content level:O2 - <20 ppm H2 - <2 ppm N2- <100 ppm
3.Grain Sizes:5-8
4. non-metallic inclusions contorlling level
| |
A |
B |
C |
D |
| |
MAX |
MAX |
MAX |
MAX |
| Thin |
2 |
2 |
2 |
2 |
| Thick |
1 |
1 |
1 |
1 |
5.Sizes of our offer range:
| Delivery condition |
Diameter ranges |
| Hot tolled |
M12-M310 |
| Hot rolled+Q&T(Quenched and tempered) |
M12-M310. |
| Cold drawn +Q&T(Quenched and tempered) |
M10-M100 |
| Peeled / Peeled+Q&T |
M10-M100 |
| Forged/Forged+Heat treatment. |
M250-M1000 |
6.MOQ:2-3tons ( one bundle ) per size
7.Sample: sample free , but not include express cost
8.Delivery time : 7-30 days after order confirmed
astm a193 b7 alloy steel round bars for threaded rod and anchor bolts astm a193 b7 alloy steel round bars for threaded rod and anchor bolts astm a193 b7 alloy steel round bars for threaded rod and anchor bolts astm a193 b7 alloy steel round bars for threaded rod and anchor bolts
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