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Applications of welded pipe piles and Testing and Materials

Mechanical properties and allowable stress of chemical compositions of 15CrMo steel tubes
 
15CrMo Steel pipe material grade is 15CrMo, is a high-quality low-alloy structural steel, which contains CR, MO more, its high temperature, corrosion-resistant performance is very good, so 15crmo alloy seamless steel tube widely used in petroleum, petrochemical, high-pressure boilers and so on.


15CrMoG seamless alloy round steel pipe /15CrMo seamless steel pipe 

Alloy seamless steel tube for its high temperature resistance, low temperature resistance, corrosion resistance has huge advantage over other seamless steel tubes, so the alloy tube are widely used in petroleum, chemical, electric power, boiler and other industries.

Product description
Standard GB5310-95
GB9948-88
ASTMA335/A335M
ASTMA213/213M
DIN17175-79
JISG3467-88
JISG3458-88
Material Cr5Mo.(P5.STFA25.T5)
15CrMo(P11,P12,STFA22)
13CrMo44
12Cr1MoV
P22(10CrMo910)
T91,P91,P9,T9
WB36
Steel grade:  T2/T5/T5b/T5c/T9/T11/T17/T21/T22/T23/T24/T36/T91/T92/T122/T911
Size: Outer Diameter (OD): 1/8''-48'' or DN6-DN1200 or 10.3mm-1219mm 

Wall Thickness (WT): SCH10-SC160 or STD, XS, XS or 1.73mm-59.54mm 

Length: 1) Single Random Length: 16ft-22ft/4.8m-6.7m
              2) Double Random Length: 22ft-35ft/6.7m-10.7m
              3) Fixed Length: 16ft-41ft/4.8-12.5m
              4) As per your requirements.
 
Technique:  Cold Drawn, Hot Rolled.
 
Applications:   petroleum  chemical
   electric power 
   high-pressure resistant
   high temperature resistant
   low temperature resistant 
 corrosion resisting of boiler industry, etc.
 

 
The 15CrMo-series Pearlite-heat-resisting steels have high thermal strength (Δb≥440mpa) and antioxidation at high temperature, and have certain capability of resisting hydrogen corrosion. Because of the high content of CR, C and other alloying elements in steel, the hardening tendency of steel is obvious and the weldability is poor.

First, 15CrMo steel chemical composition

Grade 15CrMo steel chemical composition (mass fraction) ( % )


 
C Mn Si Cr Mo Ni Nb + Ta S P
15CrMo 0.12 ~ 0.18 0.40 ~ 0.70 0.17 ~ 0.37 0.80 ~ 1.10 0.40 ~ 0.55 ≤0.30 _ ≤0.035 ≤0.035
 
Second, 15CrMo mechanical properties of steel
Grade Tensile strength MPa Yield point MPa Elongation ( % )
15CrMo steel pipe 440 ~ 640 235 twenty one
Third, 15CrMo steel allowable stress
15CrMo steel pipe GB9948 stress allowable standards
Steel number Wall thickness ( mm) In the following temperature ( deg.] C ) under the allowable stress ( Mpa)
≤ 20 100 200 250 300 350 400 450 500 525 550
12CrMo ≤ 16 128 113 101 95 89 83 77 74 71 50 ---
15CrMo ≤ 16 147 132 116 110 101 95 89 86 83 58 37
 
15CrMo steel pipe in the GB6479 standard allowable stress
Steel number Wall thickness ( mm) In the following temperature ( deg.] C ) under the allowable stress ( Mpa)
≤ 20 100 200 300 400 450 500 525 550 575 600
12CrMo ≤ 16 128 113 101 89 77 74 71 50 - - -
17 ~ 40 122 110 98 86 74 71 68 50 - - -
15CrMo ≤ 16 147 132 116 101 89 86 83 58 37 - -
17 ~ 40 141 126 110 95 86 83 79 58 37 - -


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