Oil Quenched AISI 4140 EN19 42CrMos4 Steel Round Bar / Round Bar 4140 Q+T
1.AISI steel bar chemical composition(%)
| Grade |
C |
Si |
Mn |
P |
S |
Cr |
Mo |
| 42CrMo4 |
0.38-0.45 |
0.17-0.37 |
0.40-0.70 |
≤0.035 |
≤0.035 |
0.90-1.20 |
0.15-0.25 |
| 1.7225 |
0.38-0.45 |
≤0.40 |
0.60-0.90 |
≤0.025 |
≤0.035 |
0.90-1.20 |
0.15-0.30 |
| 4140 |
0.38-0.43 |
0.15-0.35 |
0.75-1.00 |
≤0.035 |
≤0.040 |
0.80-1.10 |
0.15-0.25 |
2.Supplied size:
| Delivery condition |
Diameter ranges |
| Hot rolled |
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 |
3.AISI 4140 Mechanical Properties
Tensile strength:1080(110)MPA
Yield strength: 930(95)MPA
Elogation:12%
Reduction of area:45% AKV(impact value):63J
4.Delivery condition
Hot rolled+Q&T
Cold drawn +Q&T
Peeled+Q&T
5.Payment terms: T/T or L/ C
(1)30% paid by T/T and rest 70% by T/T upon the copy of B/B.
(2)100% irrevocable L/C at sight
6.Delivery time:within 7 days after your deposit or L/C.
7.Trade term: FOB CFR CIF
8.Mark: including steel material, heat No., pieces, weight, date and so on.
9.Quality control
1.Process for Steel round bar
Blast Furnance→ Molten Iron Pretreatment→Converter→LF→VD/RH→ContinuousCasting→Hot Rolling(KOCKS)→ Heat Treatment→ UT Inspection→Finish Product
EAF→LF→VD/RH→ Continuous Casting→Hot Rolling(KOCKS)→ Heat Treatment→ UT Inspection→ Finish Product
2.Grain Sizes:5-8
3.Surface condition: The surface of the bar shall be free cracks, scar and wrinkles at affect the use of the billets.
4.The mill test certificate shall show the chemical composition, and it is guaranteed that the chemical composition.
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