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Seamless Straightness Steel Tubes for Drilling GB/T 9808 37SiMn 38CrMoAl

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Seamless Straightness Steel Tubes for Drilling GB/T 9808 37SiMn 38CrMoAl

Brand Name : TORICH

Model Number : GB/T 9808

Certification : ISO 9001 ISO 14001 TS 16949

Place of Origin : Zhejiang China

MOQ : 5 Ton

Price : negotiable

Payment Terms : L/C, D/A, D/P, T/T, Western Union, MoneyGram

Supply Ability : 40000 Ton/Year

Delivery Time : 30 days

Packaging Details : Packing in wooden box，hexagonal bundles or other seaworthy ways.

Product Name : Good Straightness Seamless Steel Tubes for Drilling GB/T 9808 37SiMn 38CrMoAl

Material : 37SiMn 38CrMoAl

Surface : With anti rust protection

Application : For Geological Drill underground for Oil and mineral, for mining

Shape : Round

OD : 6-95mm

WT : 1-10mm

Length : 4-12.5m

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Good Straightness Seamless Steel Tubes for Drilling GB/T 9808 37SiMn 38CrMoAl

Spec:
Material:37SiMn 38CrMoAl
Size Range:OD:6-95mm
WT:1-10mm
General Length:4-12m


Chemical Compositon

CHEMICAL COMPOSITION % max
PS
0.0300.030

Tolerance of Outer Diameter and Wall Thickness

StandardProduction MethodTube Size Tolerance
GB/T 9808-2008Hot rolledOD(+1.0%D) or +0.65
(-0.5%D) -0.35
WT≤10(+15%S)or +0.45
(-10%S) -0.35
>10(+12.5%S, -10%S)
Cold Drawn(rolled)OD ±0.50%D or ±0.20
WT ±8%S or ±0.15
Q(N)/ T118-2010Cold DrawnODOD±0.40%D or ±0.20
WTWT±7%S or ±0.15


Bending Degree

Nominal Wall Thickness/mmBending Degree/(mm/m)
≤15≤1.5
＞15≤2.0

The bending degree of the wire-line drill rod is not larger than 1.0 mm per meter.
Internal Path Rod Test

Diameter of the Path RodLength of the Path Rod(mm)
d-1.0300
d=D(diameter of the tube)-2S(wall thickness of the tube)

Mechanical Property
No.GradeTensile Strangth Rm/MPaSpecifies the non-proportional extension strength Rp0.2/MPa

Percentage elongation after fracture
A/%

No less than
1ZT38064038014
2ZT49069049012
3ZT520780520a15b
4ZT54074054012
5ZT59077059012
6ZT64079064012
7ZT74084074010

a Grade ZT520 measure RP0.5
bGrade ZT520 use tensile sample S4 S5 or S6 in GB/T 228


Testing items and sampling quantity for steel tubes

Serial numberTesting itemSampling quantity
1Chemical composition1 sample from each furnace
2Tensile test1 sample from each batch
3Ultrasonic examinationAll
4Eddy current testAll
5Magnetic flux leakage testAll


Grade comparison table

This standardJIS G 3465-2006Related industry standard
ZT380—DZ240
ZT490—DZ250
ZT520STM-R780—
ZT540—DZ255
ZT590—DZ260
ZT640—DZ265
ZT740—DZ275

Mining Tubes with Alloy :For Geological Drill underground for Oil and mineral, for mining

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Product Tags:

seamless steel pipe

      

precision stainless steel tubing

      
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