WELDING HANDBOOK - lb52u.su

1 Use the bookmark or click icons below for details. Overall Index Lists of WELDING Consumables 10. For Mild Steel and 490 MPa High Tensile Strength Steel 22. For Weather Proof Steel 82. For 590-780 MPa High Tensile Strength Steel and Low Temperature Steel 96. For Heat-Resistant Low-Alloy Steel 146. For Stainless Steel 200. For Hardfacing 258. For Cast Iron 280. For Nickel-Based Alloy 286. Highly Efficient WELDING Processes 306. Appendix 320. For your further information of WELDING consumable specifications, classifications, approvals and packages, please contact the nearest Kobelco office or sales representative. Notification The purpose of changing the designation system We, WELDING Company of Kobe Steel, Ltd., thank you very much for your continuous patronage of our In recent years, we have found some other companies' products that have the same brand names as products and services. We have changed the designation system of WELDING consumable as described in ours and false certificates that misrepresent our company's certificates in Japan and the Asian countries.

2 The following from April 2008. However, the technical design of the products is not changed. In order to cope with this problem, we have taken legal actions against the impostors that could be verified and have required them to change their product names. However, it is difficult in the traditional product designation system to protect all of our products from imitation. Hence, we have established the New group brand names and the corresponding products new designation system of WELDING consumable to ensure the trademark right in main countries and to make our products identifiable more clearly, in which the particular group brand name, Trademark, is put on the head of an individual Trade Designation.. All KOBELCO WELDING consumables are designated with Trade Designation and are grouped into the following three new groups on the basis of the characteristics of individual products as detailed below. The new designation system is not only to prevent counterfeit products in Japan and overseas countries, but also to prevent our customers and users from suffering such a trouble in terms our products.

3 (1) (Famili-Arc) This modification may cause customers and users to modify their relevant documents. We sincerely hope for your understanding of the abovementioned situation and for your cooperation with us. A coined word produced by combining Familiar and Arc.. WELDING consumables grouped into this group are used for general welded structures made of mild steels and high tensile strength steels that have the tensile strength of less than 590 MPa. (2) (Trust-Arc) Concluded. A coined word produced by combining Trust and Arc.. WELDING consumables grouped into this group are used for such steels that require highly credible qualities as high tensile strength steels with the tensile strength of 570 MPa and higher, low temperature steels, and heat-resistant low-alloy steels. (3) (Premi-Arc). A coined word produced by combining Premium and Arc.. WELDING consumables grouped into this group are used for high-alloy steels, stainless steels, and nonferrous metals.

4 The new group brand name (referred to as Trademark hereinafter) is put on the head of an individual trade designation. The trade designations are made by modifying the traditional brand names in accordance with the new designation system in which the position of hyphen is reviewed so that a hyphen comes after one letter or two letters. That is, the new brand name consists of Trademark and Trade designation as shown in the following. We are determined to control all the trade designations so that they can clearly be identified. Examples of new and old brand names Old brand name New brand name (1) B-10 B-10. (2) MG-50 MG-50. (3) TGS-50 TG-S50. (4) MGS-50 MG-S50. (5) ZERODE-44 Z-44. (6) CMA-106N CM-A106N. (7) DW-308 DW-308. 2 3. Foreword Abbreviations and marks with definitions Note the following preliminary information on use of this WELDING HANDBOOK . This WELDING HANDBOOK uses the following abbreviations and marks if necessary.

5 1. Standards for WELDING consumables are abbreviated as follows Abbrev. Definition Abbrev. Definition and mark and mark JIS: Japanese Industrial Standard AC Alternating current or Air cooling NL Number of layer AWS: American WELDING Society's Standard A Ampere NR Not required EN: European Norm AP All positions OD Outer diameter ASME: American Society of Mechanical Engineers' Standard AW As-welded OQ Oil quenching Bal Balance OS Offset strength 2. Classifications for WELDING consumables are used in accordance with the following rules CR Cooling rate OSW One-side WELDING DBE Distance between electrodes Pol Polarity WELDING consumables are classified in accordance with basically the mechanical and/or DC Direct current Pre. H Preheat chemical requirements of the standards, excluding such requirements as size, length, marking and DC-EN DC, electrode negative PT Plate thickness identification manners. For details please contact the nearest Kobelco office or sales DC-EP DC, electrode positive PWHT Postweld heat treatment representative.

6 Dia. Diameter RA Reduction of area EGW Electrogas arc WELDING RC Redrying conditions 3. The test conditions of mechanical properties and hardness are as follows El Elongation RG Root gap Ext Extension of wire RT Room temperature (1) Unless otherwise specified, impact values are obtained with Charpy 2mm-V notch specimens. F Flat position SAW Submerged arc WELDING (2) Unless otherwise specified, tension test and hardness test are carried out at room temperature. FC Furnace cooling SG Shielding gas (3) Unless otherwise specified, tension test and hardness test are carried out in the as-welded FCW Flux-cored wire SMAW Shielded metal arc WELDING condition. FCAW Flux Cored Arc WELDING SR Stress relief (4) The gauge length of tensile specimens is 4 x D (where D is the diameter) for testing at room GD Groove design SW Solid wire temperature. GMAW Gas Metal Arc WELDING (T) Trailing electrode (5) Unless otherwise specified, postweld heat treatment is followed by furnace cooling.

7 GS Groove size TIG Tungsten inert gas (6) Unless otherwise specified, the testing method is as per AWS standard. GTAW Gas Tungsten Arc WELDING TS Tensile strength (7) All mechanical and chemical data are given separately as Example (one of the manufacturer's H Horizontal position Temp Test temperature laboratory test data) and Guaranty (the guaranty value as per AWS standard). Tensile HAZ Heat-affected zone V Voltage strength and offset strength are rounded as SI unit. HF Horizontal fillet VD Vertical-down position HI Heat input VU Vertical-up position 4. The weight per piece of covered electrode shows an approximate weight HT High tensile WP WELDING position Hv Hardness (Vickers) WQ Water quenching I PT Interpass temperature YP Yield point IV Impact value Maximum L Length Minimum (L) Leading electrode MS Mild steel NE Number of electrode 4 5. Warning and Caution in WELDING Pay your attention to the following warnings and cautions for your safety and health during WELDING and related operations WARNING Be sure to follow safety practices stated in the following in CAUTION Fumes and gases generated during WELDING are dangerous to order to protect welders, operators and accompanied workers your health.

8 From a serious accident resulting in injury or death. WELDING in confined spaces is dangerous because it can be a cause to suffocation by oxygen deficient. Be sure to follow safety practices stated in the following when you use WELDING consumables. Be sure to follow safety practices stated in the instruction manual of WELDING equipment Keep your head out of the source of fumes or gases to prevent you from directly when you use it. breathing high density fumes or gases. Use local exhaust ventilation, or wear respirators in order to prevent you from breathing fumes and toxic gases which cause toxication, poor health and suffocation by oxygen deficient. Use general ventilation during WELDING in a workshop. Particularly during WELDING in WARNING confined spaces, be sure to use adequate ventilation or respirators, and WELDING should Electric shock can kill. be done at the presence of a trained supervisor. Do not conduct WELDING at where degreasing, solvent cleaning, spraying, or painting operations are carried out nearby.

9 WELDING work accompanied by these operations may cause generation of harmful gases. Use adequate ventilation or respirators with special attention during WELDING plated and Do not touch live electrical parts (A covered electrode held with an electrode holder and a coated steels. WELDING wire are electrically live). Use respirators, eye safety glasses and safety leather gloves when using WELDING fluxes Wear dry, insulated gloves. Do not wear torn or wet gloves. Use an electric shock in order to prevent you from flux dust. preventing device ( , open-circuit-voltage-reducing device) when welders or operators work in confined or high-level spaces. Use also a lifeline when welders or operators conduct WELDING at a high-level space. Follow safety practices stated in the instruction manual of WELDING machines before use. Do not use a WELDING machine the case or cover of which is removed. WELDING cables CAUTION. must have an adequate size for the capacity expected.

10 WELDING cables must be kept in an appropriate condition and a damaged cable must be repaired or replaced with new Arc rays can injure eyes and burn skin. one. Wear hand shields with an adequate shade grade during WELDING operations and supervising the WELDING work. Select the correct shade grade for filter lenses and filter plates suitable for exact WELDING work by referring the standard JIS T81 41. Wear suitable protectors for protecting you from an arc ray; , safety leather glove for WELDING , long sleeve shirt, foot cover, leather apron. Use, at need, shade curtains for WELDING by surrounding the WELDING areas in order to prevent accompanied workers from arc rays. 6 7. CAUTION CAUTION. Fire and explosion can take place. The tip of a WELDING wire and filler wire can injure eyes, faces, etc. Never conduct WELDING at areas adjacent to highly inflammable materials. Remove combustibles so that spatters cannot ignite them.