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1月到库通知

1.904L 2.0mm 3.0mm 4.0mm 5.0mm 产地:瑞典7号入③号库

2.2507 6.0mm 8.0mm  10mm 产地:日本 9号入上海宝翔库

3.317L 3.0 4.0 6.0 8.0  产地:日本  17号入②号库

4.C-276 2.0mm 3.0mm 3.5mm 产地:美国 15号入③号库

5.800H 12mm  产地:日本 21号入平板库

6、304花纹板   3MM/4MM/5MM    产地:日本    25日入卷板库

7、904L  3MM   产地:瑞典   8月12日入卷板库

 

11、12月份特价销售产品:

316L热轧中厚板     产地:华新

1.4362冷轧板/卷 厚度0.8-3.0,产地:德国

2507热轧板   产地:日本

904L冷轧/热轧板     产地:瑞典/日本

11、10月底到货物资


1Cr20Ni14Si2  3/4/5/6/8/10*1500*C

产地:太钢   上海宝翔库

即将到货:

904L   18MM   产地:日本  10T

904L   2/3*1219*C   产地:德国克虏伯    20T

详细信息
日本SUS440C(9Cr18Mo)
日本SUS440C(9Cr18Mo)

  440C UNS S44004

化学成份
Carbon
0.95 to 1.20
%
Manganese (Maximum)
1.00
%
Phosphorus (Maximum)
0.040
%
Sulfur (Maximum)
0.030
%
Silicon (Maximum)
1.00
%
Chromium
16.00 to 18.00
%
Molybdenum (Maximum)
0.75
%
Iron
Balance
 
常规特性
440C is a high-carbon chromium steel designed to provide stainless properties with maximum hardness. It has been used primarily as a bearing steel, and is used in the hardened plus tempered condition. When heat-treated, Type 440C attains the highest hardness of any stainless stee (about Rockwell C 60)
应用领域
This stainless steel principally has been used in bearing assemblies, including bearing balls and races. In addition, it should be considered for cutlery, needle valves, ball check valves, valve seats, pump parts, ball studs, bushings, and wear-resistant textile components.
耐腐蚀性能
440C resists corrosion in normal domestic environments and very mild industrial environments, including many petroleum products and organic materials.

This grade is used in the hardened plus tempered condition. Optimum corrosion resistance is obtained by hardening from 2000ºF (1093ºC) to ensure better carbide solution.

However, care should be taken to minimize time at 2000ºF (1093ºC) to avoid excessive grain coarsening. For best corrosion resistance, the tempering temperature should be below about 800ºF (427ºC).

For optimum corrosion resistance, surfaces must be free of scale, lubricants, foreign particles, and coatings applied for drawing and heading. After fabrication of parts, cleaning and/or passivation should be considered.
 
注意事项:The following 4-level rating scale is intended for comparative purposes only. Corrosion testing is recommended; factors which affect corrosion resistance include temperature, concentration, pH, impurities, aeration, velocity, crevices, deposits, metallurgical condition, stress, surface finish and dissimilar metal contact.
Nitric Acid
Moderate
Sulfuric Acid
Restricted
Phosphoric Acid
Restricted
Acetic Acid
Restricted
Sodium Hydroxide
Moderate
Salt Spray (NaCl)
Restricted
Humidity
Good
 
 
 
物理性能
Specific Gravity
--
7.62
  
Density
--
0.2750
lb/in³ 
Mean Specific Heat
32°F, 212°F
0.1100
Btu/lb/°F 
Mean Coefficient of Thermal Expansion
32°F, 212°F
5.60
x 10-6 in/in/°F 
Thermal Conductivity
212°F
168.0
BTU-in/hr/ft²/°F 
Modulus of Elasticity (E)
--
29.0
x 103 ksi 
Electrical Resistivity
70.0°F
361.0
ohm-cir-mil/ft 
 
热处理
 
退火
For maximum softness, this steel should be heated uniformly to 1550/1600ºF (843/871ºC). Soak and cool very slowly in the furnace. Brinell hardness approximately 223. Intermediate or process annealing treatment-heat uniformly to 1350/1400ºF (732/760ºC). Air cool. Brinell hardness about 255.
 
淬水
Heat to 1850/1950ºF (1010/1066ºC); soak; quench in warm oil or cool in air. Do not overheat. When overheated, full hardness cannot be obtained. See comments under corrosion resistance.
 
回火
Heat to 1850/1950ºF (1010/1066ºC); soak; quench in warm oil or cool in air. Do not overheat. When overheated, full hardness cannot be obtained. See comments under corrosion resistance.
 
 
可加工形式
 
热作
Heat to 1850/1950ºF (1010/1066ºC); soak; quench in warm oil or cool in air. Do not overheat. When overheated, full hardness cannot be obtained. See comments under corrosion resistance.
冷作
If annealed for maximum softness, this steel can be moderately cold formed or headed.
切削性能
For most machining operations, this steel cuts best when in the dead soft annealed condition. Because of its high carbon content it machines somewhat like high-speed steel. Because chips are tough and stringy, chip curlers and breakers are important.
研磨和抛光
In cutlery applications, grinding and polishing are very important. 440C works well in these operations but considerable care must be used not to overheat since both the hardness and corrosion resistance may be lowered.
 
焊接
Because of its high-hardness capability, this steel is seldom welded. However, if welding is necessary, the parts should be preheated and maintained at about 500ºF (260ºC), welded, and then immediately given a 6-8 hour anneal at 1350/1400ºF (732/760ºC) with a slow furnace cool. The parts should not be allowed to cool below 500ºF (260°C) between welding and annealing. High welding heat inputs should be used. To obtain mechanical properties in the weld similar to those in the base metal, welding consumables of like composition should be considered. Otherwise, AWS E/ER309 might also be considered.
 
标准
  AMS 5618
  AMS 5630
  AMS 5880
  ASTM A276
  ASTM A314
  ASTM A473
  ASTM A493
  ASTM A580
  ASTM A756
  QQ-S-763

 

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