Universal steel grades: everything you need to know
When choosing the right steel grade for your project, it’s important to understand the various options available. U.S. Steel offers a range of general-purpose steel grades suitable for a variety of applications, including Pipe manufacturing. The most common steel grades used for pipe manufacturing include API H40, api J55, API K55 and api N80. These grades are specified by the American petroleum Institute (API) in API specification 5CT, which outlines the minimum tensile strength and other mechanical properties required for casing applications.

API H40, API J55, API K55 and API N80 are all common steel grades used in the production of Oil and gas well pipes. These grades are suitable for casing and Tubing applications and are designed to provide outstanding strength and durability under the harsh conditions encountered in oil and gas production. In addition to high tensile strength, these grades are also known for their Corrosion resistance and ability to withstand high-pressure environments.
For applications requiring greater strength and durability, U.S. Steel also offers quenched and tempered (Q&T) steel grades. These grades are specifically designed to provide enhanced mechanical properties, making them ideal for use in demanding applications such as offshore drilling and deep-sea exploration. In addition to superior strength and toughness, Q&T steel grades offer a lower-cost alternative to traditional alloy steels, making them a cost-effective choice for many applications.

Whether you’re in the market for a general-purpose steel grade or need a higher-strength alternative, U.S. Steel has what you need. With a range of options to choose from, including API H40, API J55, API K55, API N80 and Q&T grades, you can find the perfect steel to suit your specific needs. With further assurance that API minimum tensile strength and other mechanical property specifications are met, you can be confident that your steel will perform reliably in even the most demanding applications.
api 5ct L80 casing tubing Range Lengths | |||
Range 1 | Range 2 | Range 3 | |
CASING (PE/T and C/SF) | |||
Total range length, inclusive Permissible variation, max a | 4.88 to 7.62 1.83 | 7.62 to 10.36 | 10.36 to 14.63 1.83 |
1.52 | |||
TUBING AND CASING USED AS TUBING | |||
(PE/T and C/SF) | |||
Total range length, inclusive Permissible variation, max a | 6.10 to 7.32 b | 8.53 to 9.75 c | 11.58 to 12.80 d |
0.61 | 0.61 | 0.61 | |
INTEGRAL TUBING connectionS (including IJ/PE | |||
and IJ/SF) | |||
Total range length, inclusive Permissible variation, max a | 6.10 to 7.92 e | 8.53 to 10.36 | 11.58 to 13.72 0.61 |
0.61 | 0.61 | ||
PUP JOINTS | Lengths: 0.61; 0.91; 1.22; 1.83; 2.44; 3.05 and 3.66 e | ||
Tolerance: ±0.076 | |||
a Length variation applies to rail car shipment to the point of use and does not apply to order items of less than 18,144 kg of pipe. | |||
b By agreement between purchaser and Manufacturer, the maximum length may be increased to 8.57 m. | |||
c By agreement between purchaser and manufacturer, the maximum length may be increased to 10.76 m. | |||
d By agreement between purchaser and manufacturer, the maximum length may be increased to 17.72 m.0.61 m pup joints may be furnished up to 0.91 m long by agreement between purchaser and manufacturer, and lengths other than those listed may be furnished by agreement between purchaser and manufacturer. |
In summary, when selecting the appropriate steel grade for pipe manufacturing, it is important to consider factors such as the intended application, required mechanical properties and budget. U.S. Steel offers a range of general-purpose steel grades, such as API H40, API J55, API K55 and API N80, as well as quenched and tempered grades to meet a variety of needs. Whatever your requirements, U.S. Steel has the perfect steel grade for you.