Polished Rod

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Introductions

CGEG produces two types of polished rods: general polished rod and end upset polished rod. All polished rods are made of high-quality alloy cold-draw steel, with great strength and toughness, smooth surfaces and extended lifespan.

General polished rods comply with API Spec 11B Standard, with the same exterior threads at both ends (cone angle=9°), including three specifications: 1-1/8", 1-1/4" and1-1/2".

End upset polished rods comply with SY/T5029 Standard, including three specifications: 1", 1-1/8" and 1-1/4". The upset ends are the same with those of sucker rods. In application, the upset ends are connected with the couplings of sucker rods.

Mechanical Property

Type	General Polished Rod	End Upset Polished Rod
Type	Alloy Steel	D	HL	HY	KH
Rm (MPa)	655~1103 (95000~ 160000psi)	793~965 (115000~ 140000psi)	965~1195 (140000~ 173000psi)	965~1195 (140000~ 173000psi)	965~1195 (140000~ 173000psi)

Specification

Type	Material	Chemical Composition (wt.%)
Type	Material	C	Mn	Si	Cr	Mo	Ni	V	S	P	Cu
General	42CrMoA (AISI 4142)	0.38~ 0.45	0.50~ 0.80	0.17~ 0.37	0.90~ 1.20	0.15~ 0.25	≤0.30	≤ 0.07	≤ 0.025	≤ 0.025	≤0.20
End Upset	30CrMoA (AISI 4130)	0.26~ 0.33	0.40~ 0.70	0.17~ 0.37	0.80~ 1.10	0.15~ 0.25	≤0.30	≤ 0.07	≤ 0.025	≤ 0.025	≤0.20
Corrosion Resistance	30CrMnNi2MoVA (AISI 4330)	0.30~ 0.35	0.80~ 1.10	0.15~ 0.35	0.80~ 1.10	0.20~ 0.30	1.65~ 2.00	0.05 ~0.1	≤ 0.025	≤ 0.025	≤0.20