1、GM DAEWOO Auto & Technology EDSE ngineering,GM DAEWOO Auto & Technology.Standards STAINLESS STEEL BARS EDS-M-1806 ISSUED DATE: 1994. 06. 27 REVISEDDATE: 2003. 03. 11 VERSION: 3EDS-M-1806 STAINLESS STEEL BARS PAGE: 1/4 ISSUED DATE: 1994. 06. 27 REVISED DATE: 2003. 03. 11 VERSION: 3 GM DAEWOO Auto & T
2、echnology 1. SCOPE This standard specifies the stainless steel bars used by GM DAEWOO Auto & Technology Company(hereinafter referred to as the “GMDAT“). 2. MANUFACTURING METHOD 2.1. After hot rolling or forging, austenitic series shall undergo solution treatment an ferritic series shall be annealed.
3、 However, ferritic series may not be annealed as designated by the purchaser. 2.2. Bars manufactured by cold drawing, grinding, cutting or their combination shall not be heat treated, unless otherwise specified. 3. TYPE AND USE Table 1. Type and Use Type Use ApplicationsAustenitic series SUS 304 B P
4、art requiring corrosion and heat resistance SAFTY CLEVIS SUS 430 B Part requiring corrosion resistance SUS 430F B Part requiring corrosion resistance and machinabilityFerritic series SUS 434 B Part requiring corrosion resistance WEATHERSTRIP-QTR, CNL 4. QUALITY 4.1. Chemical compositionTable 2. Chem
5、ical Composition Unit: wt% Type C Si Mn P S Ni Cr Mo SUS 304 0.08 max. 1.00 max. 2.00 max. 0.045 max. 0.030 max. 8.00 10.50 18.00 20.00 - SUS 430 0.12 max. 0.75 max. 1.00 max. 0.040 max. 0.030 max. 0.60 max. 16.00 18.00 - SUS 430F 0.12 max. 1.00 max. 1.25 max. 0.060 max. 0.15 0.35 0.60 max. 16.00 18
6、.00 0.60 max. SUS 434 0.12 max. 1.00 max. 1.00 max. 0.040 max. 0.030 max. 0.60 max. 16.00 18.00 0.75 1.25 Remark: The above values are based on ladle analysis, and tolerance of product analysis shall conform to Table 4 in KS D 0228Product Analysis and its Tolerance for SteelEDS-M-1806 STAINLESS STEE
7、L BARS PAGE: 2/4 ISSUED DATE: 1994. 06. 27 REVISED DATE: 2003. 03. 11 VERSION: 3 GM DAEWOO Auto & Technology 4.2. Mechanical property Table 3. Mechanical Properties According to Heat Treatment Conditions Type Heat treatment conditions( ) Tensile strength (N/mm 2 ) Yield strength (N/mm 2 ) Elongation
8、 (%) Reduction of area (%) Hardness (HB) Austenitic series SUS 304 B 1010 1150 Rapid cooling 520 min. 205 min. 40 min. 60 min. 187 max. SUS 430 B 780 850 Air cooling/ slow cooling 450 min. 205 min. 22 min. 50 min. 183 max. SUS 430F B 680 820 Air cooling/ slow cooling 450 min. 205 min. 22 min. 50 min
9、. 183 max. Ferritic series SUS 434 B 780 850 Air cooling/ slow cooling 450 min. 205 min. 22 min. 60 min. 183 max. Remark : 1. Austenitic series is in solution treatment state and ferritic series is in annealed state. 2. The mechanical properties of the bars not heat-treated after cold drawing shall
10、conform to an agreement between the parties concerned. 4.3. Physical property(for reference) Table 4. Physical Property Type Density (g/cm 3 ) Elastic modulus Coefficient of thermal expansion Thermal conductivity Specific heat capacity Electrical resistivity SUS 304 7.90 200 16.0 15 0.50 0.73 SUS 43
11、0 7.70 220 10.0 25 0.46 0.60 SUS 430F 7.70 216 10.0 25 0.46 0.70 SUS 434 7.70 216 10.0 25 0.46 0.70 Remark: The coefficient of expansion are values at 20 100 . 4.4. Microstructure The ferritic series shall be composed of ferrites and carbides in the annealed state. However, for SUS 430F, non metalli
12、c inclusions of sulphide shall be distributed uniformly. 4.5. Corrosion resistance Table 5. Corrosion Resistance Type Salt spray test SUS 304 EDS-T-7143 144 hours grade 1 SUS 430 EDS-T-7143 72 hours grade 1 SUS 430F EDS-T-7143 72 hours grade 1 SUS 434 EDS-T-7143 144 hours grade 1EDS-M-1806 STAINLESS
13、 STEEL BARS PAGE: 3/4 ISSUED DATE: 1994. 06. 27 REVISED DATE: 2003. 03. 11 VERSION: 3 GM DAEWOO Auto & Technology 4.6. Weldability SUS 430F is not suitable for fusion welding and resistance welding due to a high S content. As other steel are susceptible to intergranular corrosion after welding, stee
14、l materials stabilized with Ti or Nb shall be used for welding. 4.7. Surface condition The surface shall be smooth and free from internal and external defects harmful to the machining process or the function of the products. 5. DIMENSIONSTable 6. Standard Thickness Unit: mm 9 10 (11) 12 13 14 15 16
15、17 (18) 19 20 22 24 25 26 28 30 32 34 (35) 36 38 40 42 44 (45) 46 48 50 55 60 65 70 75 80 85 90 100 110 120 130 140 150 160 170 180 190 200 6. NOTE Samples of materials or parts that follow this standard shall be approved by Technical Center before mass production & delivery. In the event of any mod
16、ification form this standard, it is the sole responsibility of the supplier to inform the purchaser of all such modifications. Furthermore, the supplier shall submit the modified sample for reapproval by Technical Center before mass production & delivery. 7. TEST 7.1. All tests shall be performed at
17、 23 5 . 7.2. Test standards EDS-T-7113 Method of Tensile Test for Metallic Materials Cross head speed shall be such that the increase rate of strain for parallel part of test piece shall be 40 80%/min. EDS-T-7118 Method of Brinell Hardness Test EDS-T-7143 Method of Salt Spray Test EDS-T-7144 Method
18、of Test Piece Preparation for Chemical Component Analysis KS B 0801 Tensile Test Piece for Metallic Materials No. 4, No. 10, No. 14A.EDS-M-1806 STAINLESS STEEL BARS PAGE: 4/4 ISSUED DATE: 1994. 06. 27 REVISED DATE: 2003. 03. 11 VERSION: 3 GM DAEWOO Auto & Technology 8. CROSS INDEX (REFERENCE) Table
19、7. Cross-index EDS-M-1806 KS D 3706 SAE/AISI DIN 17440 OPEL SUS 304 B STS 304-B 304 X5CrNi 18 10 QS 81810 A/D SUS 430 B STS 430-B 430 X6Cr 17 QS 81415 A/D SUS 430F B STS 430F-B 430F X12CrMoS 17 QS 81505 O/K SUS 434 B STS 434-B 434 - QS 81416 A/D 9. AUTOMOTIVE RESTRICTED HAZARDOUS SUBSTANCES Materials and components of parts must comply with EDS-A-0101.
