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30CrNiMo8 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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