Stainless Steel Pipe Quality Standards

  • GB2270-80 stainless steel seamless pipe
  • GB/T14976-94 fluid transport stainless steel seamless pipe
  • GB/T14975-94 structure with stainless steel seamless pipe
  • GB13296-91 boilers, heat exchangers, stainless steel seamless pipe
  • GB3090-82 small diameter stainless steel
  • GB5310-95 high-pressure boiler seamless pipe GB3087-82 low-pressure seamless steel pipe
  • GB3089-92 very thin-walled seamless steel pipe stainless acid
  • ASTM A213 boiler, heat exchanger ferritic and austenitic alloy steel seamless pipe
  • ASTM A269 general purpose austenitic stainless steel seamless and welded steel
  • ASTM A312 seamless steel pipe welded steel pipe welded austenitic stainless steel pipes
  • ASTM A450 carbon steel, ferritic and austenitic steel pipe for general requirements
  • General requirements for ASTM A530 special purpose ferritic steel and alloy steel
  • General requirements for bodies ASTM A789 carbon steel seamless and welded austenitic stainless steel
  • JIS G3456-88 mechanical structure with stainless steel tube
  • JIS G3448-88 ordinary pipe stainless steel pipe
  • JIS G3459-88 pipe with stainless steel tube
  • JIS G3463-88 boiler and heat exchanger stainless steel tube
  • Q / HYAD 101-91 Chemical seamless pipe length (0Cr18NI11T)
  • Q / HYAD 103-91 00Cr18Ni5MO3Si2 duplex stainless steel seamless pipe

Copper Mass and Chemical Composition Calculation Method

Red Copper is copper: Copper was purple, also known as copper. Copper density is 8.96, melting point 1083 ℃,
Copper mass is calculated as follows : G = 8.96πδ (D-δ) / 1000
G: Quality kg δ: pipe wall thickness mm D: pipe diameter mm
Suitable for manufacturing copper copper grades for T1, T2.
T1 chemical composition Cu + Ag99.95%, P0.001%, Bi0.001%, Sb0.002%, As0.002%, Fe0.005%, Ni0.002%, Pb0.003%, Sn0.002%, S0.005%, Zn0.005%, O0.02%.
T2 chemical composition Cu + Ag99.95%, Bi0.001%, Sb0.002%, As0.002%, Fe0.005%, Pb0.005%, S0.005%.
Thermal conductivity(λ)384/W·(m·K)-1
Than the thermal melting(C)0.394/kj·(kg·K)-1

Processing and Mechanical Properties of Brass Brief

1) Performance of brass pressure processing performance : α single-phase brass ( with good ductility from H96 to H65), can withstand hot and cold processing, but the α single-phase brass prone to brittle when the temperature hot forging process, which with specific temperature range with different Zn content varies, generally between 200 ~ 700 ℃. Therefore, when the thermal processing temperature should be above 700 ℃. The main reason for the single-phase α brass brittle zone temperature generated in the Cu-Zn alloy system α phase region exists Cu3Zn and Cu9Zn two ordered compounds, occurs when the low temperature heating orderly transition of the alloy brittle ; another alloy in the presence of trace amounts of lead, bismuth and copper to form harmful impurities low melting point eutectic films distributed in the grain boundaries, inter-granular fracture during thermal processing. Practice shows that the added amount of cerium can be effectively eliminated in the temperature brittleness. Two-phase brass ( from H63 to H59), in addition to having plastic alloy good α -phase, but also by the emergence of electronic compounds β CuZn-based solid solution. β -phase having a high ductility at high temperature, low temperature and the β ‘phase ( ordered solid solution ) hard and brittle nature. Therefore, (α + β) brass forged in the hot state. Greater than 46% zinc and 50% of β brass brittle because of performance, the pressure can not be processed.

2) the mechanical properties of brass : brass, zinc content, the mechanical properties are not the same, Figure 7 is a brass mechanical properties change with the zinc content of the curve. For α brass, with the increase in zinc content, σb and δ are constantly increased. For the (α + β) brass, when the zinc content increased to about 45%, room temperature strength continues to increase. If more further increase the zinc content, since the greater to the alloy brittle r phase ( Cu5Zn8 compound group in solid solution ), drastically reduced strength. (Α + β) brass is always room temperature ductility with increasing zinc content decreases. So more than 45% of the zinc -zinc alloy no practical value. Brass and brass performance related purposes.


Note: Junbro company does not provide engineering advice or information. The information provided above is only a general guide and overview, not a comprehensive applies to all products, technical information and data.

Therefore, when you choose Junbro products, please consult a professional engineer, to follow their recommendations. We provide technical information from the authorities, but Kwan platinum does not guarantee the accuracy and completeness of information, it is strongly recommended that you consult a professional for information.

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