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A3 Round Bar

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Round Bar
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Alloy steel astm a193 grade b7 / aisi 4140 / sae 4140 / 42CrMo4 material is considered as the most suitable for botls and nuts to be used at temperature below 450 degree C, with a minimum effect on its structural strength during application at a high temperature.
 
Advantages of astmastm a193 grade b7 / aisi 4140 / sae 4140 / 42CrMo4 qt steel round bar for gr 10.9 bolts we supply: 
1): Smooth surface: Smooth surface without any cracks or scales
2): Good straightness: 1mm for hot rolled + QT bars and 0.5mm for cold drawn +QT bars
3): Uniform microstructure and mechanical properties
4): Anti-rusty packages: two layers packages and load in cntainer in our factory in case rusty and package damage.
5): Fast delivery time: Within two weeks if there is stock, within one month to customize.
Detailed astm a193 grade b7 / aisi 4140 / sae 4140 / 42CrMo4 steel specification:
 
1. astm a193 grade b7 / aisi 4140 alloy steel chemical composition:
 

C
SI MN S P CR MO
0.37-0.49 0.15-0.35 0.70-1.10 0.035(MAX) 0.035(MAX) 0.75-1.20 0.15-0.25

2. astm a193 b7 / aisi 4140 alloy steel mechanical property:


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

 

3. astm a193 grade b7 / aisi 4140  q&t machine:

astm a193 grade b7 q&t steel round bar - hot rolled

astm a193 grade b7 bolts

4. astm a193 grade b7 q&t steel bar cold drawn machine:

astm a193 b7 threaded rod

astm a193 grade b7 stud bolt

 4140 steel bolts

5. astm a193 b7 steel bars inspection after quenching and tempering:

6. astm a193 b7 steel bars packages:

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