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GB/T 4241-2025 English PDF

GB/T 4241: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 4241-2025	RFQ	ASK	3 days	Stainless steel wire rods for welding	Valid
GB/T 4241-2017	150	Add to Cart	Auto, < 3 mins	Stainless steel wire rods for welding	Valid
GB/T 4241-2006	399	Add to Cart	3 days	Stainless steel wire rods for welding	Obsolete
GB/T 4241-1984	199	Add to Cart	2 days	Stainless steel wire rods for welding	Obsolete

Basic data

Standard ID: GB/T 4241-2025 (GB/T4241-2025)
Description (Translated English): Stainless steel wire rods for welding
Sector / Industry: National Standard (Recommended)
Date of Implementation: 2026-03-01
Older Standard (superseded by this standard): GB/T 4241-2017

GB/T 4241-2017: Stainless steel wire rods for welding

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Stainless steel wire rods for welding ICS 77.140.60 H44 National Standards of People's Republic of China Replace GB/T 4241-2006 Stainless steel wire rod for welding (ISO 14343.2009, Weldingconsumables-Wireelectrodes, stripelectrodes, wiresandrodsforarcweldingofstainlessand heatresistingsteels-Classification, MOD) 2017-05-31 released 2018-02-01 Implementation General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China China National Standardization Management Committee released

Foreword

This standard is drafted in accordance with the rules given in GB/T 1.1-2009. This standard replaces GB/T 4241-2006 stainless steel wire rod for welding. This standard compared with GB/T 4241-2006, the main changes as follows. --- wire rod diameter range expanded from the original standard 5mm ~ 20mm modified to expand to 4.5mm ~ 20mm; --- to improve the weight requirements of the coil; --- remove the grades Si ≤ 0.35% of the H08Cr21Ni10, H03Cr21Ni10, H12Cr24Ni13, H03Cr24Ni13, H12Cr26Ni21, H08Cr19Ni12Mo2, H03Cr19Ni12Mo2 and long-term use of H06Cr14 and H08Cr11Nb a total of nine grades; increase the brand H09Cr21Ni9Mn7Si, H16Cr19Ni9Mn7, H022Cr22Ni11, H022Cr24Ni13Nb, H022Cr21Ni12Nb, H022Cr21Ni13Mo3, H022Cr26Ni21, H022Cr20Ni16Mn7Mo3N, H022Cr19Ni12Mo2Nb, H022Cr20Ni10Nb, H011Cr33Ni31MoCuN, H10Cr22Ni21Mo3, H022Cr25 Ni9Mo3N, H10Cr12Nb, H08Cr17Nb, H022Cr17Nb, H03Cr18Ti, 022Cr13Ni4Mo and so on a total of 18 grades, The number of grades increased from the original standard 59 to 68; - Chemical composition modified by the smelting analysis for the finished product analysis, abolished the chemical composition of the finished product to allow deviation; - Elimination of low-level organization requirements in the standard, moving it to special requirements; - Added Appendix A (normative appendix) "This standard is a comparison with the original standard grade". This standard uses the re-drafting method to modify ISO 14343.2009 "welding material stainless steel and heat-resistant steel arc welding welding wire, filling Wire and welding tape classification ". For convenience of comparison, this standard lists a list of the terms of this standard and the ISO 14343.2009 standard clause in Appendix C. According to China's national conditions, this standard in the use of ISO 14343.2009 standard was modified. These technical differences are marked with vertical single lines In the margins of the terms in which they relate. A list of technical differences and their causes is given in Appendix D for reference. This standard is proposed by China Iron and Steel Industry Association. This standard is under the jurisdiction of the National Steel Standardization Technical Committee (SAC/TC183). The drafting unit of this standard. Northeast Special Steel Group Co., Ltd., Jiangsu Xinghai Special Steel Co., Ltd., Jiangsu Jinqiao Welding Technology Co., Ltd. Limited, Metallurgical Industry Information Standards Institute. The main drafters of this standard. Zhang Xiaojun, Kang Ge, Zhou Yiling, Xie Yaping, Ji health, Liu Zhuanggen, Ren Cuiying, Wang Lingjun. This standard has been replaced by previous versions of the standard. --- GB/T 1300-1977; GB/T 4241-1984, GB/T 4241-2006. Stainless steel wire rod for welding

1 Scope

This standard specifies the classification, grade, order content, size, shape, technical requirements, test methods, inspection regulations for welding stainless steel wire rods Then, packaging, logo and quality certificate. This standard applies to the production of welding wire, gas shielded wire, submerged arc welding wire, electroslag welding wire and other stainless steel wire rod welding.

2 normative reference documents

The following documents are indispensable for the application of this document. For dated references, only the dated edition applies to this article Pieces. For undated references, the latest edition (including all modifications) applies to this document. Iron and steel - Determination of manganese content - Potentiometric titration or visual titration Steel and alloys - Determination of aluminum content - Chromazu S spectrophotometric method GB/T GB/T 223.11 Determination of chromium content in steel and alloys Visual titration or potentiometric titration (GB/T 223.11-2008, ISO 4937.1986, MOD) Methods for chemical analysis of iron, steel and alloy - The chromotropic acid photometric method for the determination of titanium content GB/T GB/T 223.18 Methods for chemical analysis of iron, steel and alloy - Sodium thiosulfate separation - iodometric method for the determination of copper content Methods for chemical analysis of iron, steel and alloy - The potentiometric titration method for the determination of cobalt content GB/T Iron and steel - Determination of nickel content - Butadiene oxime spectrophotometric method GB/T GB/T 223.25 Methods for chemical analysis of iron, steel and alloy - The dibutyl copper oxime gravimetric method for the determination of nickel content Iron and steel - Determination of molybdenum content - Thiocyanate spectrophotometric method GB/T GB/T 223.28 Methods for chemical analysis of iron, steel and alloy The α-benzooxime gravimetric method for the determination of molybdenum content GB/T 223.30 Methods for chemical analysis of iron, steel and alloying - Separation of bromo-mandelic acid - Arsenazo III spectrophotometric determination of zirconium content GB/T 223.36 Methods for chemical analysis of iron, steel and alloy - Distillation separation - Neutralization titration for the determination of nitrogen content Iron and steel - Determination of niobium content - Chlorosulfonol S spectrophotometric method GB/T GB/T 223.41 Methods for chemical analysis of iron, steel and alloy - Ion exchange separation - Pyrogallol photometric method for the determination of tantalum content Iron and steel - Determination of tungsten content - Gravimetric method and spectrophotometric method GB/T GB/T 223.49 Methods for chemical analysis of iron, steel and alloy extraction - The chlorophosphonazo mA spectrophotometric method for the determination of total rare earth GB/T 223.60 Methods for chemical analysis of iron, steel and alloy - Perchloric acid dehydration gravimetric method for the determination of silicon content Methods for chemical analysis of iron, steel and alloy - The ammonium phosphomolybdate volumetric method for the determination of phosphorus content GB/T GB/T 223.64 Iron and steel - Determination of manganese content - Flame atomic absorption spectrometric method (GB/T 223.64-2008, ISO 10700.1994, IDT) GB/T 223.76 Methods for chemical analysis of iron, steel and alloy - The flame atomic absorption spectrometric method for the determination of vanadium content GB/T 223.81 Iron and alloy - Determination of total aluminum and total boron content - Microwave digestion - inductively coupled plasma mass spectrometry GB/T 223.85 Determination of sulfur content of steel and alloys - Infrared absorption method after induction furnace combustion (GB/T 223.85-2009, ISO 4935.1989, IDT) GB/T 223.86 Determination of total carbon content of steel and alloys - Infrared absorption method after induction furnace combustion (GB/T 223.86-2009, ISO 9556.1989, IDT) GB/T 226 steel at low magnification and defect corrosion test method GB/T 1979 Structural steel low magnification tissue defect rating chart GB/T 2101 steel acceptance, packaging, marking and quality of the general provisions of the certificate GB/T 11170 Determination of multi-element content of stainless steel Spark discharge atomic emission spectrometry (conventional method) Hot - rolled wire rod dimensions, shape, weight and permissible deviation (GB/T 14981-2009, ISO 16124. 2004, MOD) GB/T 17505 steel and steel products delivery general technical conditions (GB/T 17505-1998, ISO 404.1992, EQV) Sampling and sample preparation methods for the determination of chemical constituents of steels and iron GB/T 20066-2006, ISO 14284. 1996, IDT) GB/T 20123 Determination of total carbon and sulfur content of steel - High frequency induction furnace after combustion infrared absorption method (conventional method) (GB/T 20123-2006, ISO 15350.2000, IDT) GB/T 20124 Determination of nitrogen content in steel - Inert gas fusion thermal conductivity method (conventional method) (GB/T 20124-2006, ISO 15351.1999, IDT) 3 classification, grade The strip is divided into austenitic, austenitic ferrite (biphasic) type, martensite type, ferrite type and precipitation hardening type according to the organization state. See Table 1 to Table 5.

4 order content

The contract ordered in accordance with this standard shall contain the following. a) the standard number; b) grade; c) specifications; d) Weight; e) dimensional accuracy level; f) delivery status; g) smelting method; h) other special requirements. 5 size, shape, weight and allowable deviation 5.1 The nominal diameter of the wire rod is 4.5mm ~ 20mm. 5.2 The diameter of the wire rod to allow deviation and non-roundness should be consistent with the provisions of GB/T 14981-2009 (diameter 4.5mm by 5mm corresponding regulations ), The required level of accuracy should be specified in the contract, not specified should meet the B-level accuracy requirements. 5.3 The disk weight should meet the following requirements. Each coil consists of a composition, the weight should not be less than 1000kg, the following two cases to allow delivery, but the total number of rolls should not exceed 5% of the number of batches (less than 2 sets allowed 2). a) a coil consisting of less than 1000 kg but larger than 800 kg; b) consists of two coils, but the weight of not less than 1000kg, the weight of each wire rod is not less than 300kg, and there are obvious Logo.

6 technical requirements

6.1 grades and chemical composition The grades and chemical composition (finished product analysis) of wire rod shall comply with the requirements in Tables 1 to 5. 6.2 smelting method Steel should be used electric furnace or converter furnace refining, electroslag remelting and other methods of smelting, the specific requirements should be specified in the contract, not specified by the supplier select. 6.3 Delivery status Martensitic steel wire rods should be delivered in the state of annealing and pickling, and other steel wire rods are delivered in hot-rolled pickling state. Negotiated by both supply and demand, and in the together Note that the wire rod can be delivered in other states. Table 1 Austenitic stainless steel grades and chemical composition (finished product analysis) Grade Chemical composition (mass fraction) /% C Si Mn PS Cr Ni Mo Cu N Other 1 H04Cr22Ni11Mn6Mo3VN ≤0.05 ≤0.90 4.0 ~ 7.0 ≤0.03 ≤0.03 20.5 ~ 24.09.5 ~ 12.0 1.5 ~ 3.0 ≤ 0.75 0.10 ~ 0.30 V0.10 ~ 0.30 2 H08Cr17Ni8Mn8Si4N≤0.10 3.5 ~ 4.5 7.0 ~ 9.0 ≤0.03 ≤0.03 16.0 ~ 18.0 8.0 ~ 9.0 ≤ 0.75 ≤0.75 0.08 ~ 0.18 - 3 H04Cr20Ni6Mn9N ≤0.05 ≤1.00 8.0 ~ 10.0 ≤0.03 ≤0.03 19.0 ~ 21.5 5.5 ~ 7.0 ≤ 0.75 ≤ 0.75 0.10 ~ 0.30 - 4 H04Cr18Ni5Mn12N ≤0.05 ≤1.00 10.5 ~ 13.5 ≤0.03 ≤0.03 17.0 ~ 19.0 4.0 ~ 6.0 ≤ 0.75 ≤ 0.75 0.10 ~ 0.30 - 5 H08Cr21Ni10Mn6 ≤0.10 0.20 ~ 0.60 5.0 ~ 7.0 ≤0.03 ≤0.02 20.0 ~ 22.09.0 ~ 11.0 ≤ 0.75 ≤ 0.75 - 6 H09Cr21Ni9Mn4Mo 0.04 ~ 0.14 ≤0.65 3.3 ~ 4.8 ≤0.03 ≤0.03 19.5 ~ 22.08.0 ~ 10.7 0.5 ~ 1.5 ≤ 0.75 - 7 H09Cr21Ni9Mn7Si 0.04 ~ 0.140.65 ~ 1.00 6.5 ~ 8.0 ≤0.03 ≤0.03 18.5 ~ 22.08.0 ~ 10.7 ≤ 0.75 ≤ 0.75 - 8 H16Cr19Ni9Mn7 ≤0.20 ≤1.2 5.0 ~ 8.0 ≤0.03 ≤0.03 17.0 ~ 20.07.0 ~ 10.0 ≤0.5 ≤0.5 - - 9 H06Cr21Ni10 ≤0.08 ≤ 0.65 1.0 ~ 2.5 ≤0.03 ≤0.03 19.5 ~ 22.09.0 ~ 11.0 ≤ 0.75 ≤ 0.75 - 10H06Cr21Ni10Si ≤0.08 0.65 ~ 1.00 1.0 ~ 2.5 ≤0.03 ≤0.03 19.5 ~ 22.09.0 ~ 11.0 ≤ 0.75 ≤ 0.75 - 11H07Cr21Ni10 0.04 ~ 0.08 ≤ 0.65 1.0 ~ 2.5 ≤0.03 ≤0.03 19.5 ~ 22.09.0 ~ 11.0 ≤0.50 ≤ 0.75 - - 11H ≤ 22.09.0 ~ 13H022Cr21Ni10Si ≤0.03 0.65 ~ 1.00 1.0 ~ 2.5 ≤0.03 ≤0.03 19.5 ~ 22.09.0 ~ 11.0 ≤ 0.75 ≤ 0.75 - 14H06Cr20Ni11Mo2 ≤0.08 ≤ 0.65 1.0 ~ 2.5 ≤0.03 ≤0.03 18.0 ~ 21.09.0 ~ 12.0 2.0 ~ 3.0 ≤ 0.75 - 15H022Cr20Ni11Mo2 ≤0.03 ≤ 0.65 1.0 ~ 2.5 ≤0.03 ≤0.03 18.0 ~ 21.09.0 ~ 12.0 2.0 ~ 3.0 ≤ 0.75 - - 16H10Cr24Ni13 ≤ 0.12 ≤ 0.65 1.0 ~ 2.5 ≤0.03 ≤0.03 23.0 ~ 25.012.0 ~ 14.0 ≤ 0.75 ≤ 0.75 - - 17H10Cr24Ni13Si ≤ 0.12 0.65 ~ 1.00 1.0 ~ 2.5 ≤0.03 ≤0.03 23.0 ~ 25.012.0 ~ 14.0 ≤ 0.75 ≤ 0.75 - 18H022Cr24Ni13 ≤0.03 ≤ 0.65 1.0 ~ 2.5 ≤0.03 ≤0.03 23.0 ~ 25.012.0 ~ 14.0 ≤ 0.75 ≤ 0.75 - 19H022Cr22Ni11 ≤0.03 ≤ 0.65 1.0 ~ 2.5 ≤0.03 ≤0.03 21.0 ~ 24.010.0 ~ 12.0 ≤ 0.75 ≤ 0.75 - 20H022Cr24Ni13Si≤0.03 0.65 ~ 1.00 1.0 ~ 2.5 ≤0.03 ≤0.03 23.0 ~ 25.012.0 ~ 14.0 ≤ 0.75 ≤ 0.75 - 21H022Cr24Ni13Nb ≤0.03 ≤ 0.65 1.0 ~ 2.5 ≤0.03 ≤0.03 23.0 ~ 25.012.0 ~ 14.0 ≤ 0.75 ≤ 0.75 - Nb10 × C ~ 1.0 Table 1 (continued) Grade Chemical composition (mass fraction) /% C Si Mn PS Cr Ni Mo Cu N Other 22H022Cr21Ni12Nb ≤0.03 ≤ 0.65 1.0 ~ 2.5 ≤0.03 ≤0.03 20.0 ~ 23.011.0 ~ 13.0 ≤ 0.75 ≤ 0.75 - Nb10 × C ~ 1.2 23H10Cr24Ni13Mo2 ≤ 0.12 ≤ 0.65 1.0 ~ 2.5 ≤0.03 ≤0.03 23.0 ~ 25.012.0 ~ 14.02.0 ~ 3.0 ≤ 0.75 - - 24H022Cr24Ni13Mo2 ≤0.03 ≤ 0.65 1.0 ~ 2.5 ≤0.03 ≤0.03 23.0 ~ 25.012.0 ~ 14.02.0 ~ 3.0 ≤ 0.75 - - 25H022Cr21Ni13Mo3 ≤0.03 ≤ 0.65 1.0 ~ 2.5 ≤0.03 ≤0.03 19.0 ~ 22.012.0 ~ 14.02.3 ~ 3.3 ≤ 0.75 - - 26H11Cr26Ni21 0.08 ~ 0.15 ≤ 0.65 1.0 ~ 2.5 ≤0.03 ≤0.03 25.0 ~ 28.020.0 ~ 22.5 ≤ 0.75 ≤ 0.75 - 27H06Cr26Ni21 ≤0.08 ≤ 0.65 1.0 ~ 2.5 ≤0.03 ≤0.03 25.0 ~ 28.020.0 ~ 22.5 ≤ 0.75 ≤ 0.75 - 28H022Cr26Ni21 ≤0.03 ≤ 0.65 1.0 ~ 2.5 ≤0.03 ≤0.03 25.0 ~ 28.020.0 ~ 22.5 ≤ 0.75 ≤ 0.75 - 29H12Cr30Ni9 ≤ 0.15 ≤ 0.65 1.0 ~ 2.5 ≤0.03 ≤0.03 28.0 ~ 32.08.0 ~ 10.5 ≤ 0.75 ≤ 0.75 - Lt;/RTI & gt; 31H06Cr19Ni12Mo2Si≤0.08 0.65 ~ 1.00 1.0 ~ 2.5 ≤0.03 ≤0.03 18.0 ~ 20.011.0 ~ 14.02.0 ~ 3.0 ≤ 0.75 - - 32H07Cr19Ni12Mo2 0.04 ~ 0.08 ≤ 0.65 1.0 ~ 2.5 ≤0.03 ≤0.03 18.0 ~ 20.011.0 ~ 14.02.0 ~ 3.0 ≤ 0.75 - - 33H022Cr19Ni12Mo2 ≤0.03 ≤ 0.65 1.0 ~ 2.5 ≤0.03 ≤0.03 18.0 ~ 20.011.0 ~ 14.02.0 ~ 3.0 ≤ 0.75 - - 34H022Cr19Ni12Mo2Si≤0.03 0.65 ~ 1.00 1.0 ~ 2.5 ≤0.03 ≤0.03 18.0 ~ 20.011.0 ~ 14.02.0 ~ 3.0 ≤ 0.75 - - 35H022Cr19Ni12Mo2Cu2 ≤0.03 ≤ 0.65 1.0 ~ 2.5 ≤0.03 ≤0.03 18.0 ~ 20.011.0 ~ 14.02.0 ~ 3.0 1.0 ~ 2.5 - - 36H022Cr20Ni16Mn7Mo3N≤0.03≤1.00 5.0 to 9.0≤0.03≤0.02 19.0 to 22.015.0 to 18.02.5 to 4.5≤0.5 0.10 to 0.20 - 37H06Cr19Ni14Mo3 ≤0.08 ≤ 0.65 1.0 ~ 2.5 ≤0.03 ≤0.03 18.5 ~ 20.513.0 ~ 15.03.0 ~ 4.0 ≤ 0.75 - - 38H022Cr19Ni14Mo3 ≤0.03 ≤ 0.65 1.0 ~ 2.5 ≤0.03 ≤0.03 18.5 ~ 20.513.0 ~ 15.03.0 ~ 4.0 ≤ 0.75 - - 39H06Cr19Ni12Mo2Nb ≤0.08 ≤ 0.65 1.0 ~ 2.5 ≤0.03 ≤0.03 18.0 ~ 20.011.0 ~ 14.02.0 ~ 3.0 ≤ 0.75 - Nb8 × C ~ 1.0 408, 20.00.03, 418H05Cr20Ni34Mo2Cu3Nb≤0.07≤0.60≤2.5≤0.03≤0.03 19.0 ~ 21.032.0 ~ 36.02.0 ~ 3.0 3.0 ~ 4.0 - Nb8 × C ~ 1.0 42H019Cr20Ni34Mo2Cu3Nb ≤ 0.025 ≤ 0.15 1.5 ~ 2.0 ≤0.015 ≤0.02 19.0 ~ 21.032.0 ~ 36.02.0 ~ 3.0 3.0 ~ 4.0 - Nb8 × C ~ 0.40 43H06Cr19Ni10Ti ≤0.08 ≤ 0.65 1.0 ~ 2.5 ≤0.03 ≤0.03 18.5 ~ 20.59.0 ~ 10.5 ≤ 0.75 ≤ 0.75 - Ti9 × C ~ 1.00 44H21Cr16Ni35 0.18 ~ 0.25 ≤ 0.65 1.0 ~ 2.5 ≤0.03 ≤0.03 15.0 ~ 17.034.0 ~ 37.0 ≤ 0.75 ≤ 0.75 - 45H06Cr20Ni10Nb ≤0.08 ≤ 0.65 1.0 ~ 2.5 ≤0.03 ≤0.03 19.0 ~ 21.59.0 ~ 11.0 ≤ 0.75 ≤ 0.75 - Nb10 × C ~ 1.0 46H06Cr20Ni10NbSi ≤ 0.08 0.65 ~ 1.00 1.0 ~ 2.5 ≤0.03 ≤0.03 19.0 ~ 21.59.0 ~ 11.0 ≤ 0.75 ≤ 0.75 - Nb10 × C ~ 1.0 47H022Cr20Ni10Nb ≤0.03 ≤ 0.65 1.0 ~ 2.5 ≤0.03 ≤0.03 19.0 ~ 21.59.0 ~ 11.0 ≤ 0.75 ≤ 0.75 - Nb10 × C ~ 1.0 48H019Cr27Ni32Mo3Cu ≤0.025 ≤ 0.50 1.0 ~ 2.5 ≤0.02 ≤0.03 26.5 ~ 28.530.0 ~ 33.03.2 ~ 4.2 0.7 ~ 1.5 - - 49H019Cr20Ni25Mo4Cu ≤0.025 ≤ 0.50 1.0 ~ 2.5 ≤0.02 ≤0.03 19.5 ~ 21.524.0 ~ 26.04.2 ~ 5.2 1.2 ~ 2.0 - - 50H08Cr16Ni8Mo2 ≤0.10 ≤ 0.65 1.0 ~ 2.5 ≤0.03 ≤0.03 14.5 ~ 16.5 7.5 ~ 9.5 1.0 ~ 2.0 ≤ 0.75 - 51H06Cr19Ni10 0.04 ~ 0.08 ≤ 0.65 1.0 ~ 2.0 ≤0.03 ≤0.03 18.5 ~ 20.09.0 ~ 11.0 ≤ 0.25 ≤ 0.75 - Ti? 0.05, Nb? 0.05 52H011Cr33Ni31MoCuN ≤ 0.015 ≤ 0.50 ≤2.00 ≤0.02 ≤ 0.01 31.0 ~ 35.030.0 ~ 33.00.5 ~ 2.0 0.3 ~ 1.20.35 ~ 0.60 - H10Cr22Ni21Co18Mo3W3 TaAlZrLaN 0.0 to 0.20 a Nb? 0.30, Co16.0 to 21.0, W2.0 to 3.5, Ta0.30 to 1.25, Al0.10 to 0.50, Zr0.001 to 0.100, La0.005 to 0.100, and B0.02. Table 2 Austenitic - ferritic stainless steel grades and chemical composition (finished product analysis) Grade Chemical composition (mass fraction) /% C Si Mn PS Cr Ni Mo Cu N Other 54H022Cr22Ni9Mo3N ≤0.03 ≤0.90 0.5 ~ 2.0 ≤0.03 ≤0.03 21.5 ~ 23.57.5 ~ 9.5 2.5 ~ 3.5 ≤ 0.75 0.08 ~ 0.20 - 55.Therefore, 56H022Cr25Ni9Mo4N≤0.03≤1.0≤2.5≤0.03≤0.02 24.0 ~ 27.08.0 ~ 10.52.5 ~ 4.5 ≤1.5 0.20 ~ 0.30W≤1.0 Table 3 Ferritic stainless steel grades and chemical composition (finished product analysis) Grade Chemical composition (mass fraction) /% C Si Mn PS Cr Ni Mo Cu N Other 57H06Cr12Ti ≤0.08 ≤ 0.8 ≤ 0.8 ≤0.03 ≤0.03 10.5 ~ 13.5 ≤0.6 ≤0.50 ≤ 0.75 - Ti10 × C ~ 1.5 58H10Cr12Nb ≤0.12 ≤0.5 ≤0.6 ≤0.03 ≤0.03 10.5 ~ 13.5 ≤0.6 ≤ 0.75 ≤ 0.75 - Nb8 × C ~ 1.0 59H08Cr17 ≤ 0.10 ≤0.5 ≤0.6 ≤0.03 ≤0.03 15.5 ~ 17.0 ≤0.6 ≤ 0.75 ≤ 0.75 - 60H08Cr17Nb ≤0.10 ≤0.5 ≤0.6 ≤0.03 ≤0.03 15.5 ~ 17.0 ≤0.6 ≤ 0.75 ≤ 0.75 - Nb8 × C ~ 1.2 Supply > Supply of Nb8 × C ~ 1.2 ~ Nb 62H03Cr18Ti ≤0.04 ≤0.8 ≤0.8 ≤0.03 ≤0.03 17.0 ~ 19.0 ≤0.6 ≤0.5 ≤ 0.75 - Ti10 × C ~ 1.1 63H011Cr26Mo≤0.015≤0.4≤0.4≤0.02≤0.02 25.0 ~ 27.5 Ni Cu≤0.5 0.75 ~ 1.50 Ni Cu≤0.5≤0.015 - Table 4 Martensitic stainless steel grades and chemical composition (finished product analysis) Grade Chemical composition (mass fraction) /% C Si Mn PS Cr Ni Mo Cu N Other 64 H10Cr13 ≤0.12 ≤0.5 ≤0.6 ≤0.03 ≤0.03 11.5 ~ 13.5 ≤0.6 ≤ 0.75 ≤ 0.75 - 65 H05Cr12Ni4Mo ≤0.06 ≤0.5 ≤0.6 ≤0.03 ≤0.03 11.0 ~ 12.5 4.0 ~ 5.0 0.4 ~ 0.7 ≤ 0.75 - 66022Cr13Ni4Mo≤0.03 0.30 ~ 0.90 0.6 ~ 1.0 ≤ 0.025 ≤ 0.015 11.5 ~ 13.5 4.0 ~ 5.0 0.4 ~ 0.7 ≤0.3 ≤0.05 - 67 H32Cr13 0.25 ~ 0.40 ≤0.5 ≤0.6 ≤0.03 ≤0.03 12.0 ~ 14.0 ≤ 0.75 ≤ 0.75 ≤ 0.75 - - Table 5 grades and chemical composition of precipitated hardened stainless steel (finished product analysis) Grade Chemical composition (mass fraction) /% C Si Mn PS Cr Ni Mo Cu Nb 68H04Cr17Ni4Cu4Nb≤0.05≤0.75 0.25-0.75≤0.03≤0.03 16.00 ~ 16.75 4.5 ~ 5.0 ≤0.75 3.25 ~ 4.00 0.15 ~ 0.30 6.4 Surface quality The wire rods shall be well machined and shall not have any defects on the surface, and the depth of the surface longitudinal crack shall not exceed the depth of the table Regulations. Table 6 The depth of the longitudinal crack in the wire rod is in millimeters The nominal diameter of the wire rod allows the depth of the defect 4.5 ~ 14.0 ≤ 0.15 > 14.0 ~ 20.0 ≤ 0.20 6.5 SPECIAL REQUIREMENTS According to the requirements of the demand side, and in the contract specified, can increase the slipping double demand.

7 test method

7.1 The inspection items and test methods shall be in accordance with Table 7. Table 7 Inspection items, sampling quantity, sampling site and test method No. Test item Sampling quantity Sampling part Test method 1 Chemical composition 1 GB/T 20066 See 7.2 2 low magnification 2 The stove cast steel is equivalent to the different billet of the ingot head Or wire rod, continuous casting steel in any different branch bar; Equivalent to the billet or wire rod of the ingot head and tail GB/T 226, GB/T 1979 3 size by root whole root wire rod caliper, micrometer and other precision measuring tools

4 surface quality by root whole root article as

7.2 Chemical analysis methods according to GB/T 223.4, GB/T 223.9, GB/T 223.11, GB/T 223.16, GB/T 223.18, GB/T 2233.20, GB/T 223.23, GB/T 223.25, GB/T 223.26, GB/T 223.28, GB/T 223.30, GB/T 223.36, GB/T 223.40, GB/T 223.41, GB/T 223.43, GB/T 223.49, GB/T 223.60, GB/T 223.61, GB/T 223.64, GB/T 223.76, GB/T 223.81, GB/T 223.85, GB/T 223.86 or GB/T 11170, GB/T 20123, GB/T 20124, etc. General method. D......

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