AISI 4330V
LOW ALLOY STEEL
LOW ALLOY 4330V: ASTM A29
GENERAL SCOPE
AISI 4330V is a low alloy steel containing nominally 0.4% C, 0.8% Cr, 0.25% Mo and 1.8% Ni. Higher strength levels up to 150 KSI 0.2% PS may be achieved by suitable heat treatment. Often used in preference to AISI 4140 at the higher strength levels because of its better hardenability and improved CVN impact toughness. This grade is widely used in downhole applications such as drilling jars.
The hardenability limitations of this grade (depth to which it will harden / obtain the specified mechanical properties after heat treatment) must always be taken into account when designing and selecting equipment.
Howco has extensive experience heat treating and supplying this alloy at a number of strength levels.
CHEMICAL COMPOSITION
| C | Si | Mn | P | S | Cr | Ni | Mo | Fe | |
|---|---|---|---|---|---|---|---|---|---|
| Min | 0.38 | 0.15 | 0.60 | . | . | 1.65 | 0.70 | 0.20 | 0.00 |
| Max | 0.43 | 0.35 | 0.80 | 0.035 | 0.040 | 2.00 | 0.90 | 0.30 | 0.00 |
MECHANICAL PROPERTIES
| U.T.S | 150 KSI Min | (1034 N/mm2) |
| 0.2% Proof Stress | 130 KSI Min | (896 N/mm2) |
| Elongation | 13 % | |
| Red of Area | 40 % |