Categories | Stainless Steel Wire |
---|---|
Brand Name: | HAOSTEEL |
Model Number: | HS302 |
Certification: | ISO9001 |
Place of Origin: | CHINA |
MOQ: | Negotiation |
Price: | Negotiation |
Payment Terms: | L/C, T/T |
Supply Ability: | 5000tons per month |
Delivery Time: | 5-10 working days after order confirmed and receive deposit |
Packaging Details: | Woven bags and plastic strips inside packing, wooden / iron pallet and steel strips outside packing. |
Product: | Stainless Steel Wire |
Standard: | GB , JIS, ASTM , AISI , DIN |
Grade: | 302HQ |
Surface: | Surface is uniform and beautiful, with linear stability. |
C: | Max 0.03% |
Cr: | 17%-19% |
Ni: | 8%-10% |
Sectional dimension: | 0.05mm-10mm |
Company Info. |
Shanghai Haosteel Co., Limited |
Verified Supplier |
View Contact Details |
Product List |
302HQ 304HC 0.05mm ~ 10mm stainless steel wire high tensile strength
Description:
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 and 305 for cold
heading applications, copper being a lower cost alternative to
their high nickel contents.
The stable austenitic structure makes 302HQ non-magnetic, even
after substantial cold work, and also results in excellent
toughness, even down to cryogenic temperatures.
Chemical composition:
Grade | C | Mn | Si | P | S | Cr | Mo | Ni | Cu | |
302HQ | min. max. | - 0.03 | - 2.00 | - 1.00 | - 0.045 | - 0.030 | 17.0 19.0 | - | 8.0 10.0 | 3.0 4.0 |
Physical Properties (typical values in the annealed condition)
Grade | Density (kg/m3) | Elastic Modulus (GPa) | Mean Coefficient of Thermal Expansion | Thermal Conductivity | Specific Heat 0-100°C ( J/kg.K) | Electrical Resistivity (nW.m) | |||
0-100°C (mm/m/°C) | 0-315°C (mm/m/°C) | 0-538°C (mm/m/°C) | at 100°C (W/m.K) | at 500°C (W/m.K) | |||||
302HQ | 7900 | 193 | 17.2 | 17.8 | 18.8 | 16.3 | 21.5 | 500 | 720 |
Grade Specification Comparison
Grade | UNS No | Euronorm | Swedish SS | Japanese JIS | |
No | Name | ||||
302HQ | S30430 | 1.4567 | X3CrNiCu18-9-4 | - | SUS XM7 |
Corrosion Resistance
Equal to or exceeding that of Grade 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. Consult hao
Technical Assistance for specific environmental recommendations.
Heat Resistance
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.
Heat Treatment
Solution Treatment (Annealing) Heat to 1010-1120°C and cool
rapidly. This grade cannot be hardened by thermal treatment.
Welding
Use Grade 308L rods or electrodes. Excellent weldability by all
standard fusion methods, both with and without filler metals.
Because of its applications this grade is not often welded.
Exceptions are resistance butt welding to join wires together
during wire manufacture, and when the grade is used to make stud
welding fasteners. 302HQ is not specifically listed in AS 1554.6.
Machining
302HQ is rarely machined, because of its form and likely products.
The grade always has very low sulphur content as this aids
formability, but unfortunately this also reduces machinability.
Machining is certainly possible.
An Improved Machinability version of Grade 302HQ is produced,
having a very high machinability. This version has a slightly
higher sulphur content and is also calcium treated. This Improved
Machinability grade (referred to as Ugima 4567) is available only
to special order, but should be considered as an option where an
“18/8” type grade needs to be both heavily cold formed and
extensively machined.
Specified Properties
These properties are specified for grade S30430 wire in ASTM A493; wire is the only commonly available form for this grade. Properties of finished fasteners are covered by other specifications, such as ISO 3506-1 and 3506-3.
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