GB/T 26075-2019Steel bars for sucker rods (English PDF)

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009.

This standard replaces GB/T 26075-2010 "round bar for sucker rods". Major technical changes compared to GB/T 26075-2010 as follows.

--- Revised the specifications, nominal diameter tolerance and out-of-roundness in Table 1 (see 4.1.1, 4.1.1 of 2010 edition);

--- Increased the size and accuracy requirements of hot rolled wire rods (see 4.1.3);

--- Increased the number of 30MnNiMoA, 23Ni2MoVA (see 5.1.1);

--- Revised the reference level of 25CrMoA, 35CrMoA steel (see 5.1.1, 5.1.1 of the 2010 edition);

--- The requirement for sulfur residual element content is tightened (see 5.1.1, 5.1.1 of 2010 edition);

--- Increased the mechanical performance requirements for the addition of 2 new grades (see 5.4.1);

--- Increased normalizing temperature allows adjustment range (see 5.4.1);

--- Revised the surface quality description of hot rolled round steel (see 5.8.1, 5.8.1 of the 2010 edition);

--- Revised the rules for the weight of the wire rod (see 8.3, 8.3 of the 2010 edition);

--- Revised the requirements of the HY level in Appendix A (see Appendix A, Appendix A of the 2010 edition);

--- Add Appendix B (see Appendix B).

1 Scope

This standard specifies the order content, size, shape, weight and allowable deviation of the round bar for sucker rods, technical requirements, test methods, inspection rules. Then, packaging, signs and quality certificates.

This standard is applicable to round steel (hereinafter referred to as "round steel") or wire rod for hot-rolled and cold drawn sucker rods with a nominal diameter of not more than 70 mm.

2 Normative references

The following documents are indispensable for the reference to this document. For dated references, only dated versions apply to this document. For undated references, the latest edition (including all amendments) applies to this document.

GB/T 223.5 Determination of acid-dissolved silicon and total silicon content - Reducing silyl molybdate spectrophotometric method

GB/T 223.9 Determination of aluminium content in steels and alloys - chrome azure S spectrophotometric method

GB/T 223.11 Determination of chromium content in steels and alloys - either titration or potentiometric titration

GB/T 223.13 Methods for chemical analysis of steels and alloys - Determination of vanadium content by ferrous ammonium sulphate titration

GB/T 223.16 Methods for chemical analysis of steels and alloys - Determination of titanium content by chromotropic acid photometric method

GB/T 223.19 Methods for chemical analysis of steels and alloys - s.

GB/T 223.23 Determination of nickel content in steels and alloys - succinimide spectrophotometric method

GB/T 223.26 Determination of molybdenum content of steels and alloys - thiocyanate spectrophotometric method

GB/T 223.40 Determination of bismuth content of steels and alloys - chlorosulfonol S spectrophotometric method

GB/T 223.58 Methods for chemical analysis of steels and alloys - Determination of manganese content by sodium arsenite - sodium nitrite titration

GB/T 223.59 Determination of phosphorus content of steels and alloys - phosphine molybdenum blue spectrophotometric method and bismuth phosphomolybdenum blue spectrophotometric method

GB/T 223.68 Steel and alloy chemical analysis method - Determination of sulfur content by potassium iodate titration after combustion in tubular furnace

GB/T 223.69 Determination of carbon content of steel and alloys

GB/T 223.78 Determination of boron content by direct photometric method of curcumin

Decarburization layer depth measurement method for GB/T 224 steel

Low-magnification structure and defect acid etching test method for GB/T 226 steel

GB/T 228.1 tensile testing of metallic materials - Part 1

GB/T 229 metal material Charpy pendulum impact test method

GB/T 702-2017 Hot rolled steel rod size, shape, weight and tolerance

GB/T 905-1994 Cold drawn round steel, square steel, hexagonal steel size, shape, weight and tolerance

GB/T 1979 structural steel low-fold tissue defect rating map

General provisions for GB/T 2101 steel acceptance, packaging, marking and quality certificates

GB/T 2975 steel and steel products mechanical properties test sampling position and sample preparation

GB/T 4336 Determination of multi-element content of carbon steel and medium-low alloy steels by spark discharge atomic emission spectrometry (conventional method)

GB/T 6394 method for determination of average grain size of metals

GB/T 10561-2005 Determination of non-metallic inclusions in steel - Standard s