Centering Guide
Centering guide
1. Steel grade AISI 4145H
C |
Si |
Mn |
P |
S |
Cr |
Ni |
Mo
|
Cu |
Al |
0.42 |
0.17 |
1.0 |
|
|
1.1 |
|
0.22 |
|
|
0.49 |
0.35 |
1.25 |
0.025 |
0.02 |
1.35 |
0.25 |
0,35 |
0.35 |
0.05 |
2. steel melting: EAF +LF+VD
3. Forging ratio: 1:3 min
4. Heat treatment : quenching & tempering .
5. Machining : as per drawing.
6. Mechanical properties :
Tenlise strength ≥966N/mm2 yeild strength ≥793N/mm2
Elongation ≥13% reduction of area ≥45%
Impact test v notch, radial direction ≥55J(20℃)
7. Hardness :
285-341HB
8. Grain size (ASTM112) ≥5 or fine .
9. Non-metallic inclusion as per ASTM-45 method A:
A B C D ≤2.5 ≤2.0 ≤1.5 ≤2.0
10.UT as per ASTM A388
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