15CrMo 12Cr2Mo 12Cr5Mo GB6479 Seamless Steel Tube , Length 4-12m

GB6479 Seamless Steel Tubes for High-Pressure Chemical Fertilizer Equipments

Material:10# 20# Q345B 12CrMo 15CrMo 12Cr2Mo 12Cr5Mo ASTM 1010/1020/179/192 st37/35.4/35.8/45-8

Size Range:OD:3-420mm

WT:0.5-50mm

General Length:4-12m

Tolerance:

According to the following tables or customers’ request.

Characteristic:

Good concentricity

Good surface quality

Good OD and ID tolerance

High Precision

Stable quality

Smooth Roughness

TORICH QUALITY ASSURANCE

Characteristic:Technical Requirements

Physical performance

QUALITY CONTROL

1~ Incoming Raw Material Inspection
2~ Raw Material Segregation to avoid steel grade mix-up
3~ Heating and Hammering End for Cold Drawing
4~ Cold Drawing and Cold Rolling, on line inspection
5~ Heat Treatment, +A, +SRA, +LC, +N, Q+T
6~ Straightening-Cutting to specified length-Finished Measuring Inspection
7~ Machanical Testing in own labs with Tensile Strength, Yield Strength, Elongation, Hardness, Impact, Mictrostruture etc
8~ Packing and Stocking.

100% of our steel tubes are dimensionally checked
100% of our steel tubes are visually checked to assure they have a perfect surface condition and no surface defects.
100% eddy current test and ultrosonic test to eliminate longitudinal and transversal defects.

Producing Method:hot roling(extrude pressing,expansion) or cold drawn(rolling)

Technical Delivery Conditions:Steel tubes shall be delivered after heat treatment in the way specified the table given below. The way of heat treatment shall be noted in the quality certificate.

Widely used in the field of/Application:High-pressure fertilizer equipment and pipe seamless steel pipe, Transport water, sewage, gas, air, heating steam and other low-pressure fluid etc.