Specifications

tube/seamless steel honed tubes/internal honed with external hard chromium plate tube/internal honed & hard chromium plate tube

 tube

For steel products:
a. seamless steel honed tubes

b. internal honedwith external hard chromium plate tube

c. internal honed & hardchromium plate tube
e. high-carbon anti-friction bearing steel bar

f.  hollow bar
g. induction hardening chromium plate bar sae 1045/jis s45c/din ck45

For aluminum products:
a.  aluminum alloy tubes for pneumatic cylinder
b.  aluminum alloy profile tubes for pneumatic cylinder

For stainless steel products:
a.  stainless steel chrome plate rods/grind rods type sus 303/304/316
b.  stainless seamless steel honed tubes/extra-thin seamless steel tube sus 304/304l/316/316l
c.  stainless seamless/welded industrial steel pipes astm a312
d.  stainless seamless/welded steel sanitary tubing astm a270

 

Grade: CK45, ST 52.3 BK +S
O.D: 20 to 700mm
Max length 12m
Straightness: 0.3 -1.0/1000
Tolerance EXT: DIN 2391
Tolerance INT: ISO H8 to H9
Roughness(Ra): 0.2 to 0.8
Tensile strength: > 60kgf/mm2
Yield Point: > 52kgf/mm2
Elongation: ≥14%

TOLERANCES

1.OUTER DIA

               <40mm                                      ±0.2mm

      FROM 40 TO 100mm                           ±0.3mm

               >100mm                                    ±0.5mm

 2.WALL THK

              <120mm OD                                ±5%

               >120mm                                     ±7.5%

 3.STRAIGHTNESS                       1/1000 OF THE TUBE LENGTH

 4.INSIDE HONNED DIA                    ISO H8

 5.ROUGHNESS                           0.2-0.4µ

 6.LENGTHS

              LENGTH<500                                                +2mm

              500<LENGTH<=2000                                     +3mm

              2000<LENGTH<5000                                     +6mm

              5000<LENGTH<7000                                     +10mm

 7.TUBE ENDS

    TUBE ENDS SHALL BE CUT NOMINALLY SQUARE TO THE TUBE AXIS AND   SHALLBE      FREE FROM THE EXCESSIVE BURRS

8. APPEARANCE

1.  TUBES SHALL HAVE A SMOOTH INTERNAL & EXTERNAL SURFACE CONSISTENT WITH

COLD WORKING PROCESS

TUBE INNER SURFACE SHOULD BE FREE FROM RUST, DENT & SCRATCHES