The Common China Grades Of Stamping Materials

Combined with our company’s experience in the stamping processing industry, we will summarize all kinds of metal stamping parts materials we come into contact with, and the average market price of stamping raw materials involved in the quotation of metal stamping parts. As a stamping factory, Pinjin specializes in the production of stamping parts for automobiles and metal stamping parts for home appliances. This article summarizes the market prices of metal stamping materials and general material market prices we have mastered as follows, and shares them with you. The metal stamping materials listed in this article are all cold stamping processing, excluding hot stamping forming materials.

The value of our existence is to create value for the world. This article summarizes various metal stamping parts materials and their quotation calculations for reference by people in the relevant industry. Due to the limited personal knowledge, the article was written in a hurry during spare time, and the words did not convey the meaning. The data deviation or fallacies in this article are inevitable. I implore the industry elites to point out the correctness, hoping to contribute to the upgrading of the motherland’s manufacturing, and contribute to the Made in China 2025.

Due to the many types and specifications involved in metal stamping materials, and the influence of transaction conditions such as order quantity and payment method, as well as the influence of material origin and market price fluctuations, the different prices of various purchase channels cannot be completely accurate. In general, when estimating the cost of materials in the quotation of metal stamping parts, it is feasible to roughly calculate the average price of materials in actual operation. The price of metal stamping materials listed in this article is the average price in the current spot market. It is for everyone to understand the general market of stamping materials and to estimate the cost of materials for stamping parts inquiries and quotations.

The Classification Of Metal Stamping Materials

There are many types of common metal stamping materials, which are divided into three categories from the material composition: 1, steel plate and steel alloy; 2, pure copper plate and copper alloy plate; 3, pure aluminum plate and aluminum alloy plate;

1.1, steel plate and alloy steel plate: Ordinary steel plate often refers to ordinary carbon structural steel and high-quality carbon structural steel. After adding other alloying elements to the steel, the material obtains higher strength, high temperature resistance, and excellent properties such as corrosion.

1.2, Common cold-rolled and hot-rolled steel sheet stamping materials for common carbon structural steel sheets refer to low-carbon steel. The national standard grade Q195 is commonly used as stamping material. Compared with Q215, Q235 and other plates, Q195 is most commonly used in the stamping field. Corresponding to the national standard Q195, Japan’s JIS standard, the cold-rolled steel grade is SPCC, and the hot-rolled steel grade is SPHC. After deep processing, there are plated or coated sheets, electro-galvanized sheet SECC, hot-dip galvanized sheet SECC, tin-plated sheet (commonly known as tinplate) SPTE and color-coated sheet, etc.

1.3. The difference between high-quality carbon structural steel plate and ordinary carbon steel is that impurities such as phosphorus and sulfur are further removed, and the mechanical properties are better. The common grades of high-quality carbon steel plates are the national standard 08Al, which is very close to 08F and 08. The corresponding American standards are similar to ASTM SAE1006 and 1008. Most of the metal stamping parts are interchangeable and universal. The German DIN standards for common high-quality carbon structural steel plates include ST12, ST13, ST14, ST15, and ST16; the corresponding European standard materials are DC01, DC02, DC03, DC04, DC05, and DC06. The better the impact performance, the corresponding Japanese JIS standard grades are: SPCC, SPCD, SPCE (equivalent to 08Al), SPCF, SPCE-T. German standard, European standard and Japanese standard low-carbon steel are mostly produced in large domestic steel mills, and large steel products can be bought in the spot market.

In general, when stamping parts are manufactured, the interchangeability of various material grades:

  • ST12 is interchangeable with DC01, SPCC and Q195;
  • ST13 is interchangeable with DC03 and SPCD;
  • Interchangeable between ST14 and DC04, SPCE, 08Al, SAE1006 and SAE1008;
  • ST15, DC05, SPCF are interchangeable and universal;
  • ST16, DC06, SPCE-T are interchangeable and universal;

1.4, There are many types of alloy steel, and it is also widely used in metal stamping materials. Common materials include various high-strength steels, stainless steel, spring steel (manganese steel), silicon steel sheets, etc.

1.5. As the name suggests, high-strength steel refers to high-strength steel, whose mechanical properties are superior to carbon structural steel. It is customary to take the yield strength of 295MPa as the limit, and structural steels with a strength above the Q295 grade are classified as high-strength steels, such as Q295, Q345 (16Mn), Q460, etc. These are all Chinese national standard numbers, and the value after the letter Q is the lowest value of the material’s nominal yield strength, in MPa. The Japanese standard high-strength steel mostly uses the tensile strength as the nominal value, such as: SAPH440, SAPH590, etc., and the value after the letter is the lowest value of the nominal tensile strength. The application of high-strength steel in the automotive industry continues to expand, and the application of high-strength steel in the body frame of some models has reached 90%. There are many types of high-strength steel grades used in automotive stamping parts. There are standards in various countries, large steel factories have standards, and some large car factories have their own standards. I will not give more examples here. The supporting cooperation system between auto stamping parts manufacturers and various car factories is relatively stable, and the purchase channels of high-strength steel plate materials for auto stamping parts manufacturers are also very stable. If the material market fluctuates, auto stamping parts manufacturers will receive price adjustment notices as soon as possible. Therefore, the quotation of general automobile stamping parts and the calculation of high-strength steel materials are not suitable for referring to the average market price of metal stamping parts materials listed in this article.

1.6, there are many types of stainless steel, and the brand No. 6 used for stamping materials is generally expressed by the Japanese JIS standard. Commonly used grades are: 200 series, SUS201 and SUS202 with chromium, nickel, manganese and iron as the main alloy elements, corresponding to the national standard 1Cr17Mn6Ni5N, 1Cr18Mn8Ni5N; 300 series, austenitic stainless steel with chromium, nickel and iron as the main alloying elements, such as SUS301, SUS304, SUS316, etc. The corresponding Chinese national standard grades are 1Cr17Ni7 12Cr17Ni7 (old grade 1Cr17Ni7), 12Cr19Ni10 (old grade 0Cr18Ni9), 06Cr17Ni12Mo2 (old grade 0Cr17Ni12Mo2); 400 series, SUS430, SUS439, SUS430 are commonly known as stainless iron, and the corresponding national grade is 1Cr17. SUS439 stainless steel is widely used in automobile exhaust pipe assembly, heat shield, and metal stamping parts of other engine exhaust pipe assemblies. At present, there is no corresponding national standard grade. Baosteel produces SUS439 stainless steel materials according to Japanese JIS standards. . From the countryside to the factory to the city, stainless steel is generally called according to the Japanese JIS standard or the American ASTM standard in China. The number after the SUS letter is the American ASTM grade of the stainless steel stamping material. The national standard grades of stainless steel materials for stamping parts are expressed according to the material composition of their main alloy elements, which is highly academic, but not easy to remember. Taking the simple SUS430-1Cr17 as an example, the national standard reads one chromium and seventeen; while for SU304-12Cr19Ni10 (old brand name 0Cr18Ni9), the national standard reads twelve chromium, nineteen nickel and ten (old brand name: zero chromium, eighteen nickel and nine). The names of stainless steel national standard numbers are too complicated for the general public to remember.

1.7, spring steel stamping materials, common grades are national standard 65Mn, corresponding to German standard CK67, and Japanese standard JIS SK5 (national standard T8Mn), SK7 (T7), etc.

2.1, common metal stamping pure copper sheet: the natural color of pure copper is red, which is called red copper. Because the surface of pure copper is easily oxidized into purple red, it is also often called red copper. The common national standard grade is T2, corresponding to the Japanese standard JIS grade is C1100 , the American Standard ASTM is C11000, the grade with less impurities is T1, and the T3 with more impurities is relatively less used in the metal stamping industry. Pure copper is further deoxidized and smelted, and there are oxygen-free copper TU1, TU2, and phosphorus deoxidized copper TP1, TP2 to obtain more excellent electrical properties, mechanical properties, welding, processing properties, etc. Common copper alloy stamping materials are: brass, phosphor bronze, beryllium bronze and nickel nickel.

2.2. The brass material is copper-zinc alloy. The common stamping material grades are H62 and H65, and the corresponding standard copper content is about 62% or 65%. The less commonly used ones are H59, H68, H70, etc. The percentage composition of copper element.

2.3. Phosphor bronze, commonly known as phosphor bronze, is a bronze with tin, phosphorus, and copper as the main alloying elements, containing 2-8% tin and 0.1-0.4% phosphorus. The common grades of phosphor bronze are C5191 and C5210, which are the grades of the Japanese JIS standard, and are mostly called by the Japanese standard in the industry. Corresponding to the national standard grades QSn6.5-0.1, QSn8-0.3, the national standard name is often difficult to remember, but there are fewer people in the industry who call the national standard grade of phosphor bronze.

2.4. Beryllium bronze is known as the king of elastic materials. It is bronze with beryllium as the main additive element, and the content of beryllium is 0.2-2%. Commonly used metal stamping materials beryllium bronze grades are the national standard grade QBe2, the corresponding American standard ASTM grade is C17200, and the Japanese standard JIS grade is C1720.

2.5, Nickel nickel, a copper-nickel alloy with nickel as the main additive element, is silvery white, hence the name cupronickel. As a stamping material, it is widely used in the shielding cover stamping parts of precision electronics and communication products such as mobile phones and routers. The thickness is mostly between 0.127-0.2mm.

3.1, the pure aluminum plate and aluminum alloy plate materials used to make metal stamping parts are mostly called according to the American standard ASTM. Commonly used grades are: pure aluminum 1050, 1060, the old grades corresponding to the national standard were L3, L2, and now the new national standard grades are also 1050, 1060 in line with the American standard ASTM; aluminum alloy plate: 5052 (LF2), 5754 (none) , 6061 (LD30), 6063 (LD31), 7072 (LB1), 7075 (LC9), etc. Aluminum sheets for stamping parts generally only need to know the American Standard ASTM grade. The first number in the American Standard ASTM four-digit system for Alcoa materials indicates the category of aluminum and aluminum alloys:

1, 1XXX series industrial pure aluminum; 2, 2XXX series Al-Cu, Al-Cu-Mn alloy; 3, 3XXX series Al-Mn alloy; 4, 4XXX series Al-Si alloy; 5, 5XXX series Al-Mg alloy ; 6, 6XXX series Al-Mg-Si alloy; 7, 7XXX series Al-Mg-Si-Cu alloy; 8, 8XXX series, etc. The material of the can is 3003 (LF-21), a 3-series aluminum-manganese alloy.

Spot Market Price Of Metal Stamping Parts Materials

Stamping steel market prices, January 2009:

The largest domestic steel mills were originally Baosteel and Wuhan Iron and Steel. Due to the poor management of Wuhan Iron and Steel and continuous losses, the two steel mills merged and reorganized in September 2016 to form Baowu Iron and Steel Group. company. In the past, Baosteel was generally the most expensive for all kinds of steel, followed by Wuhan Iron and Steel, which was about 3% cheaper, and Anshan Iron and Steel, which was about 5% cheaper. The price is about 8% cheaper, and there are smaller local steel mills, and the small width and narrow materials produced by small rolling mills are even cheaper. After Baosteel and Wuhan Iron and Steel merged into Baowu Iron and Steel Group, the production capacity and sales channels of the two iron and steel groups were integrated, and the prices tended to be close. Here, only the tax-included price of Baosteel and the wholesale price including 16% value-added tax in the spot steel market are used for analysis.

In fact, in the process of product development and proofing to mass production, metal stamping processing plants will understand the quality requirements of customers, and select low-cost and high-cost steel spot steel products in the steel market under the condition that the quality requirements of their products are met. This generally meets the material requirements of the product and the dimensional tolerance requirements of the stamping parts, unless the customer specifies the steel factory to be selected, such as a stamping part project of an electric bell cover, the product drawing provided by the customer has specific requirements to use Taiwan Sinosteel SPCC To ensure sound quality, but this is rare. Many stamping factories operate in this way to balance the extra costs that are difficult to accurately evaluate during the early quotation or bidding of metal stamping parts projects, such as accidents, high scrap rate of defective products, and business public relations expenses of customer-side staff.

Ordinary cold-rolled sheet: Q195 or SPCC, thickness 1-2mm, priced at 7,500 yuan/ton; the common cold-rolled sheet on the market is 3.2mm thick minus 200 yuan/ton, and as thin as 0.2mm plus 1,500 yuan/ton, Intermediate values and so on.

The domestic grade of ordinary cold-rolled plate is Q195 (yield point 195MPa), the European standard grade is DC01, the German DIN standard grade is ST12, and the Japanese JIS standard grade is SPCC. SPCC was originally the name of “generally used cold-rolled carbon steel sheets and strips” in the Japanese Standard (JIS). Now many companies directly use it to indicate the same kind of steel produced by themselves. For example, Baosteel Q/BQB402 standard has SPCC.

There will be slight differences in the specific prices of the above materials, and approximate values can be used for preliminary quotations. Among them, the three materials of Q195, SPCC, ST12 and DC01 belong to the same level in stamping level, and the price ranges from low to high. They can be substituted for each other in the manufacture of stamping parts for special purposes without deep drawing and stretching.

Cold-rolled high-quality carbon structural steel plate, such as the domestic brand 08AL, corresponding to the SPCE of the Japanese standard JIS, and the American standard ASTM 1006. High-quality carbon steel is also divided into cold-rolled sheets and hot-rolled sheets. The stamping parts industry mostly uses cold-rolled sheets with a thickness of less than 3.2mm. The average price of high-quality carbon steel cold-rolled plates made of domestic materials is 8,000 yuan/ton. Some grades and thickness and width specifications of high-quality carbon also have MOQ requirements, and they need to be delivered in whole rolls, with a minimum order of 5-8 tons per roll, including DC01-DC06, ST12-ST16, etc. Domestic high-quality carbon steel plate drawing and deep drawing materials are priced at 8,500 yuan/ton, such as DC05-06, ST14-16. Thin materials below 1.0mm add 500 yuan/ton, and 0.2mm thick add 1,500 yuan/ton.

Hot-rolled plate, 5500/ton. For stamping purposes, hot-rolled pickling plates are mostly selected, and the surface removes scale to facilitate subsequent surface treatments such as electroplating and powder spraying.

The common hot-rolled plate domestic brand commonly used for stamping parts is still Q195, and the corresponding Japanese brand name is SPHC.

Cold-rolled sheet, or hot-rolled sheet is commonly known as, the performance of stamping parts with this kind of steel has no special requirements such as deep drawing and deep drawing. Design drawings in European and American countries also have similar abbreviated names: C.R.S (cold roll steel; H.R.S (hot roll steel).