Steel Sucker Rods

Steel Sucker Rods
The hardened surface of sucker rods

Grade C sucker rods are made of high-quality alloy steel,withmoderate strength, great plasticity and good corrosion resistance etc. Grade C sucker rods can be used in weakly acidic media without sulfurized stress fracture.

Grade D sucker rods are made of high-quality alloy steel, with moderate strength, great plasticity and lifespan after heat treatment. Grade D sucker rods can be used in rather deep oil wells with a corrosion-free or mildly corrosive environment.

Grade K sucker rods are made ofhigh-quality alloy steel with a rather high content of Ni, with moderate strength, great plasticity and good corrosion resistance etc. Grade K sucker rods can be used in acidic media.

Grade KD sucker rods combined the material of Grade K and the performances of Grade D, achieving high strength and certain corrosion resistance at the same time. Grade KD sucker rods can be used in rather deep oil wells with a corrosive environment.

Grade HL sucker rods (ultra-high strength) share the same structure and size with Grade D. Through appropriate heat treatment, the strength of Grade HL is 22% greater than Grade D's, without sacrificing plasticity. Grade HL sucker rods can be used deep or large pumping oil wells with a corrosion-free or mildly corrosive environment.

Grade HY sucker rods (ultra-high strength) basically share the same structure, size and parameters with Grade D, with a strength 22% greater than that of Grade D. Grade HY sucker rods are made of high-quality alloy steel. On the basis of the heat pre-treatment, the surface goes through secondary quenching by induction heating, so that the surface can bearing greater pressure and the strength and lifespan of the sucker rods are improved.

Specification
Grade C K D KD HL HY KH
Material 25CrMnVA (AISI 1526) 20Ni2MoA (AISI 4621) 20CrMoA (AISI 4119) 30CrMoA (AISI 4130) 25NiMnCrMoA (AISI 3130) 30CrMoA (AISI 4130) 35CrMoA (AISI 4130) 30CrMoA (AISI 4130) 30CrNi2MoA (AISI 4330)
Mechanical Properties
Rm (MPa) 621~793 621~793 793~965 793~965 965~1195 965~1195 965~1195
Rel (MPa) ≥414 ≥414 ≥586 ≥586 ≥795 ≥795 ≥830
A (%) ≥12 ≥12 ≥10 ≥10 ≥10 -- ≥12
Z(%) ≥55 ≥55 ≥50 ≥50 ≥50 -- ≥55
HRC 16~23 16~23 23~32 23~32 32~36 ≥42 32~36
Color White Light blue Yellow Orange Red Green Deep blue
Grade C, D K, KD C, D KD D, HL HY KD, KH
Material 25CrMnVA (AISI 1526) 20Ni2MoA (AISI 4621) 20CrMoA (AISI 4119) 25NiMnCrMoA (AISI 3130) 30CrMoA (AISI 4130) 30CrMoA (AISI 4130) 30CrNi2MoA (AISI 4330)
Chemical Composition(wt%)
C 0.21~0.30 0.18~0.23 0.17~0.24 0.22~0.29 0.26~0.33 0.26~0.33 0.28~0.35
Mn 1.30~1.70 0.70~0.90 0.40~0.70 0.71~1.00 0.40~0.70 0.40~0.70 0.70~0.90
P ≤0.025 ≤0.025 ≤0.025 ≤0.025 ≤0.025 ≤0.025 ≤0.025
S ≤0.025 ≤0.025 ≤0.025 ≤0.025 ≤0.025 ≤0.025 ≤0.025
Si 0.17~0.37 0.17~0.37 0.17~0.37 0.15~0.35 0.17~0.37 0.17~0.37 0.17~0.37
Cu ≤0.20 ≤0.20 ≤0.20 ≤0.20 ≤0.20 ≤0.20 ≤0.20
Ni ≤0.35 1.65~2.00 ≤0.30 0.72~1.00 ≤0.30 ≤0.30 1.65~2.00
Cr ≤0.30 ≤0.35 0.80~1.10 0.42~0.65 0.80~1.10 0.80~1.10 0.80~1.10
Mo ≤0.06 0.20~0.30 0.15~0.25 0.01~0.06 0.15~0.25 0.15~0.25 0.20~0.30
V ≤0.07 ≤0.07 ≤0.07 ≤0.07 ≤0.07 ≤0.07 ≤0.07
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China Geological Equipment Group Co., Ltd.

Add.: 5th Floor, Botai Mansion, No. 221 Wangjing Xiyuan, Beijing 100102

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