AISI 4140
ASTM A-29, ASTM A-193, ASTM A-519,
API 5CT, API 6A, API 7-1, API 14A
GENERAL SCOPE:
AISI 4140 low alloy steel containing nominally 0.40% Carbon with Chromium and Molybdenum as the primary hardening elements. It is the most widely used low alloy steel for oil patch applications. Usually supplied in the hardened and tempered condition at 22 HRC maximum, it also finds favour in many applications requiring higher strength levels up to 150 KSI 0.2% PS. It is extensively used in tubular form for downhole tools.
CHEMICAL COMPOSITION:
| C | Si | Mn | P | S | Cr | Mo | Fe | |
|---|---|---|---|---|---|---|---|---|
| Minimum | 0.128 | 0.15 | 0.40 | 0.80 | 0.15 | 0.00 | ||
| Maximum | 0.43 | 0.35 | 1.00 | 0.035 | 0.040 | 1.10 | 0.25 | 0.00 |
MECHANICAL PROPERTIES:
Condition Hardend and Tempered to 22 HRC max
| U.T.S. | 100 KSI Min |
| 0.2% Proof Stress | 80 KSI Min |
| Elongation | 20% |
| Red of Area | 40% |
Condition Hardend and Tempered to 30-36 HRC max
| U.T.S. | 130 KSI Min |
| 0.2% Proof Stress | 110 KSI Min |
| Elongation | 13% |
| Red of Area | 30% |
Important Note:
Information given in this data sheet about the condition or usability of materials respectively products are no warranty for their properties, but act as a description. The information we give on for advice, comply to the experiences of the manufacturer as well as our own. We cannot give a warranty for the results of processing and application of the products.