We produce many kinds of API sucker rod couplings, including Spraying Metal coupling (Class SM)and Common couplings(Class T). Our couplings has all types and sizes, made of good quality steel alloy (AISI5140). Our Class SM Couplings are the deflection-proof and abrasion-proof sucker rod coupling, which has three main functions: wear-proof, corrosion-resisting and reducing the friction. This is our characteristic products. Class SM Couplings are coated a layer of abrasion-proof and lessening friction of powder. Our T and SM coupling are all manufactured in accordence with API Spec 11B standard.

And we can also provide API sucker rod, pony rod, polished rod for you without any extra profit from our brotherhood company.

API Class T sucker rod coupling

1)Material: Seamless Alloy Steel 40Cr (AISI 5140)

2)Standard: API Spec 11B

3)Size: 5/8〞; 3/4〞; 7/8〞; 1〞; 1-1/8〞

4)Type: Full size and Slim Hole

5)Features: The Class T coupling is manufactured with a through hardness of between 16 and 23 Rc. This result in high tensile and fatigue strengh for the coupling. The outside diameter is smooth to minimize stress concerntrations, and an accurate chamfer allows for controlled contact stress. The threads are rolled full form which results in compressive stresses at the thread root and improved fatigue resistance.

API Class SM sucker rod coupling

1)Material: Seamless Alloy Steel 40Cr (AISI 5140)

2)Standard: API Spec 11B

3)Size: 5/8〞; 3/4〞; 7/8〞; 1〞; 1-1/8〞

4)Type: Full size and Slim Hole

4)Smoothness: 3.1×10-3

5)Coat Thickness(in): 0.01in ~ 0.02in

6)Basic hardness: HRC 16-23

7)Surface Hardness: HRA 58-62

8)Intergrate intension(Mpa): 484

9)Hole rate: <2%

10)Min. Hardness of the layer: 595HV0.2

11)Min. Tensile Strength: 655 Mpa

12)Operating Temperature: -1000~400℃

13)Life: > 180 days