GENERAL SCOPE
4340 is a low alloy steel that is used in downhole tools and hangers that require very high strength with excellent impact resistance.
CHEMICAL COMPOSITION
|
|
C |
Si |
Mn |
P |
S |
Cr |
Mo |
Ni |
Al |
Sn |
Cu |
|
Min |
0.37 |
0.15 |
0.55 |
|
|
0.65 |
0.20 |
1.55 |
0.015 |
|
|
|
Max |
0.44 |
0.35 |
0.90 |
0.015 |
0.015 |
0.95 |
0.30 |
2.00 |
0.035 |
0.025 |
0.25 |
MECHANICAL PROPERTIES
|
Tensile |
Result |
Tensile |
Result |
|
RP 0.2% |
105,000 - 135,000 PSI |
HBW10/3000 |
262-300 BHN |
|
RM |
>125,000 PSI |
KCV @ -32 DEG C |
42J MIN AVE, 34J MIN SINGLE VALUE |
|
Reduction of Area |
50% |
||
|
Elongation |
16% |
SURFACE CONDITION Peeled Bar.
REDUCTION RATIO 4:1 Min
STRUCTURE Grain size will be ASTM 5 or finer.
ULTRASONIC EXAMINATION Ultrasonic examination available per ASTM A388/API6A Latest Edition
STOCK RANGE
Rolled / Peeled Bar Normalised, quenched and tempered. 50.8mm –265mm ⌀
Forged Annealed Bar Annealed condition suitable for further heat treatment. 270mm – 609.6mm ⌀