Cold Weather Service NS-1 High Strength Material AISI4145, AISI 4330V Forging

Dual Chemistry Specification

It allows the use of either AISI 4145 or AISI 4330V as long as all of the requirements are met for the given option. For example, to allow use of AISI 4145, all of the given 4145 requirements need to be met.

Chemical Analysis

The chemical composition shall be determined in accordance with ASTM A751 and shall meet the requirements in weight percent for the specific grade as listed in the table below.

Mechanical Properties

The surface hardness shall be as listed below as measured by ASTM E18 or E10. The mechanical properties shall be referenced from the relevant Engineering drawing determined at the approximate mid-radial location in accordance with ASTM A370 and shall be within the following ranges.

The absorbed impact energy shall be determined at the temperatures indicated using the Charpy V-notch method in accordance with ASTM E23. For cold weather service Charpy’s shall meet the requirements when tested at -40°C(-40°F)

Through Thickness Hardness Testing in accordance with NS-1

Prior to purchase, bars will be subjected to a through thickness 12 point Hardness test with no values having a hardness differential greater than 6RC points. This is to be done in accordance with the requirements of NS-1 specification for Drill Stem Substitutes.

Tiptop was established in the year of 2006, located in the center of China, Xi’an City, which is an ISO certified comprehensive manufacturer & distributor in the field of Oil & Gas upstream, downhole drilling tools, downhole fishing tools, downhole mud motor, and servicing the worldwide drilling companies, EPC contractors and oil companies. With our great diligence & years of experiences, we have built a long term cooperation with clients from North America, Middle East, Europe, Southeast Asia and other areas.

-One stop procurement service at more favorable prices

Being in the field of oilfiled for more than 13 years , Tiptop team can offer customers with whole package requirements in favorable prices , which are supported by Tiptop qualified vendors .

-Strict quality control & Continuous after-sales service

All of Tiptop supplied products are from API certified manufacturers. For each enquiry, from order placement to final delivery, no matter for the whole package or small spare parts, we have internal inspection team to ensure the superior quality, strong packing & timely delivery. Any TPI inspection are available with Tiptop from SGS/BV/TUV/DNV etc..

Besides,Thoughtful and prompt after-sales service will be provided to guarantee customerS' benefits .