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Zhejiang Zhonggang Mining Co.,Ltd
Add:Fl19th,Huameng Business Plaza, No.2 Chezhan Road, Lucheng District, Wenzhou, Zhejiang Prov
Tel:+86-0577-86008557
Mob:+8613600679430
E-mail:marketing@zjzgsteel.com

Seamless Stainless Steel Pipe

UNS S32750 Pipe & Tube

UNS S32750 Pipe & Tube

UNS S32750 pipe & tube...

20130919202908-1485004359

material・standard

ASTM A240EN 10088-2 / 10028-7JISISO
 UNS S327501.4410

UNS S32750

 CSiMnPSNiCrMoNCu
min6.024.03.00.24
max0.0300.801.200.0350.0208.026.05.00.320.50

EN 1.4410 *

 CSiMnPSNiCrMoNCu
min6.024.03.00.24
max0.0301.002.000.0350.0158.026.04.50.35

 

Physical properties

Specific heat(J/kg・K)453
Resistivity(μΩ・cm)83.0
Thermal conductivity(W/m・K)12.3
Average coefficient of thermal expansion(10-6/℃)30–100℃13.4
30–200℃13.7
30–300℃13.8
30–400℃14.0
Longitudinal elastic modulus(MPa)19.7 x 104
Strong magnetismyes
Melting point(℃)1390-1455

Room temperature mechanical properties

UNS S32750

0.2%Yield Strength(N/mm2)tensile strength(N/mm2)Elongation(%)hardness(HB)Impact energy             room temperature,Vgap,size(J)
≧ 550≧ 795≧ 15≦ 310

EN 1.4410 *

0.2%Yield Strength(N/mm2)tensile strength(N/mm2)Elongation(%)hardness(HB)Impact energy             room temperature,Vgap,size(J)
≧ 530730-930≧ 20≧ 100 (long)≧ 60 (tr)



High temperature strength

temperature(℃)0.2%Yield Strength(N/mm2)tensile strength(N/mm2)Elongation(%)
10053078933
15050977431
20047075131
25046576129
30045777527
35045877526
40044075829

 

impact data

Image: 冲击值

 

Corrosion resistance

Compared with ordinary austenitic stainless steels such as SUS 304 and SUS 316L and duplex stainless steels such as UNS S32205, UNS S32750 has better local corrosion resistance (pitting corrosion resistance, crevice corrosion resistance) and acid corrosion resistance.

Pitting corrosion resistance and crevice corrosion resistance

Image: 耐点腐蚀性能和耐缝隙腐蚀性能

Acid corrosion resistance

Corrosion resistance to various acids(Test time: 24 hours)

 concentrationtemperatureCorrosion rate(CPT)
NAS 74NNAS 64NAS 329J3LSUS 316L
H2SO410%boiling2.253.643.7019.70
HCl1%boiling0.020.035.416.94
HNO360%boiling0.060.080.110.17
H3PO480%boiling2.834.995.5225.00
CH3COOH80%boiling< 0.01< 0.01< 0.01< 0.01

Equal corrosion curve in sulfuric acid(Corrosion rate< 0.1mm/y)

Image: 硫酸中的等腐蚀曲线(腐蚀速度<0.1mm/y)

 

Flexible processability

Due to its high yield strength and low elongation compared to SUS 304, attention should be paid to cold working.。

Weldability

Keep the inter-passage temperature below 100 °C to suppress the formation of intermetallic compounds. No need to warm up. Please use UNS S32750 special solder。

Heat treatment

The solution treatment temperature is 1080 ° C to 1120 ° C, and must be quenched after heat treatment. The cooling rate should be as fast as possible, and the time to exposure to the embrittlement temperature range (475 ° C brittle temperature range, σ brittle temperature range) must be shortened.

Pickling

Pickling uses a mixture of nitric acid and hydrofluoric acid. Since the scale of the NAS 74N is slightly more difficult to remove than the SUS 304, it is more effective to perform a short-time alkali immersion before pickling or, if possible, shot peening.

application

Chemical equipment, chemical tankers, desalination equipment, sea water pumps, etc.


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    Add:Fl19th,Huameng Business Plaza, No.2 Chezhan Road, Lucheng District, Wenzhou, Zhejiang Prov
    Tel:+86-0577-86008557
    Mob:+8613600679430
    E-mail:marketing@zjzgsteel.com
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