وینزہو کیکسن کیکسن میٹل کمپنی ، لمیٹڈ
سٹینلیس سٹیل کیا ہے؟ 302HQ？
Grade 302HQ is a specialised wire grade with very wide usage for manufacture of stainless steel
fasteners. The inclusion of 3% copper in the composition reduces the cold work hardening rate
substantially compared to Grade 304. 302HQ is standard for manufacture of self-tapping screws
and light machine screws; it is also used for some bolts, set screws, rivets and specialised
fasteners. It has now totally replaced Grades 384 اور 305 for cold heading applications, copper
being a lower cost alternative to their high nickel contents.
The designation 302HQ is not standardised – ASTM specifications list the grade as UNS S30430,
and alternative designations for the same grade include "XM-7”, "304Cu” اور "304HQ”. The
standard specification for stainless steel fasteners, ISO 3506, includes 302HQ as an acceptable
composition for fastener grade “A2”; it is commonly produced in strength grades A2-70 and A2-80.
302HQ سٹینلیس سٹیل 1.4567 تیار شدہ مصنوعات کا فارم
- کنڈلی – پٹی
- Foil: Inquire with Ulbrich Stainless Steel Wire – Profile
- Round
- Flat
- Square
کے لیے درخواستیں 302HQ سٹینلیس سٹیل
- Food processing equipment
- Transport and storage equipment (e.g., beer brewing, milk processing, wine making)
- Kitchen benches, sinks, troughs, equipment, and appliances
- Architectural paneling, ریلنگ, and trim
- Chemical containers, including for transport
- Heat exchangers
- Woven or welded screens
- Threaded fasteners
- Springs
ایquivalents of grade 302HQ
| گریڈ | UNS No | Old British | Euronorm | Swedish SS | Japanese JIS | ||
| بی ایس | En | نہیں | Name | ||||
| 302HQ | S30430 | 394S17 | – | 1.4567 | X3CrNiCu18-9-4 | – | SUS XM7 |
کمپوزیشن ranges for 302HQ grade of stainless steel
مکینیکل پراپرٹیز
| جائیداد | قدر |
| تناؤ کی طاقت, منٹ | 515 ایم پی اے |
| پیداوار کی طاقت (0.2% ثبوت), منٹ | 205 ایم پی اے |
| Elongation in 50 ملی میٹر, منٹ | 40% |
| سختی, زیادہ سے زیادہ | 201 ایچ بی |
فزیکل پراپرٹیز
| گریڈ | کثافت (kg/m3) | Elastic Modulus (جی پی اے) | Mean Coefficient of Thermal Expansion (µm/m/°C) | تھرمل چالکتا (W/m.K) | مخصوص حرارت 0-100 °C (J/kg.K) | برقی مزاحمتی صلاحیت (nΩ.m) | |||
| 0-100 °C | 0-315 °C | 0-538 °C | at 100 °C | at 500 °C | |||||
| 302HQ | 8027 | 193 | 17.2 | 17.8 | 18.8 | 16.3 | 21.5 | 500 | 720 |
سنکنرن مزاحمت
Equal to or exceeding that of گریڈ 304. Subject to pitting and crevice corrosion in warm chloride
environments, and to stress corrosion cracking above about 50°C. 302HQ is considered resistant
to potable water with up to about 200mg/L chlorides at ambient temperatures, reducing to about
150mg/L at 60°C.
گرمی کی مزاحمت
Good oxidation resistance in intermittent service to 870°C and in continuous service to 925°C.
Continuous use of Grade 302HQ in 425-860°C range is usually safe (free of carbide precipitation)
as the grade has a very low carbon content.
گرمی کا علاج
Solution Treatment (اینیلنگ) – Heat to 1010-1120°C and cool rapidly. This grade cannot be hardened by thermal treatment.
Cold Work Hardening
302HQ has the lowest work hardening rate of any of the common austenitic stainless steels. This results in a tensile strength increase of approximately 8MPa/%Ra (8MPa increase in tensile strength for each 1% reduction of area of cold work – this data from wire drawing). Even after substantial cold work this grade remains essentially non-responsive to a magnet.
ویلڈنگ
Stainless steel AISI 304CU (1.4567, X3CrNiCu18-9) has good weldability and can be used with many common welding processes such as TIG welding and MIG welding. It can also be used for arc welding, but this should be carried out with appropriate welding parameters to avoid overheating and distortion. To reduce tension and maintain the mechanical properties, the material should be allowed to cool in the air after welding. No heat treatment is required.
مشینی صلاحیت
AISI 304CU (1.4567) stainless steel is generally machinable, but this material hardens during machining. Therefore, care must be taken to select a sufficient cutting depth. In addition, suitable tools and coolants should be used to prevent overheating and extend tool life.