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  • Name: Honed Tube
  • No.: 03

Standard:DIN2391,EN10305,JISG3445,ASTMA519,GB3639,16Mn,27SiMn,25Mn,SAE1026

Material:ST45,ST52,20 #,45#,CK45,16Mn,27SiMn,25Mn,SAE1026

Delivery condition:BKS

Outer diameter:50-300mm

Inner diameter:40-250mm

I.D. Tolerance:H8~H9

Length:3-9m

Straightness:1/1000

I.D. roughness:RA 0.4micron(max)

Technology:Honed & SRB(SKIVED AND ROLLER BURNISHED )

Chemical Component:

Steel Grade

Chemical Composition (%)

C

Si

Mn

P

S

Cr

St45

0.17-0.24

0.17-0.37

0.35-0.65

0.035

0.035

0.250

ST52(E355)

≤0.22

≤0.55

≤1.6

0.025

0.025

0.25

SAE1026

0.22-0.28

0.15-0.35

0.60-0.90

0.040

0.050

/

27SiMn

0.24-0.32

1.10-1.40

1.10-1.40

0.035

0.035

0.300

20#

0.17-0.24

0.17-0.37

0.35-0.65

0.035

0.035

0.250

Chemical Composition(%)

Steel Grade C Si Mn P(≦) S(≦) Cr(≦)
ST45 0.17-0.24 0.17-0.37 0.35-0.65 0.035 0.035 0.250
ST52(E355) ≦0.22 ≦0.55 ≦1.6 0.025 0.025 0.250
SAE1026 0.22-0.28 0.15-0.35 0.60-0.90 0.040 0.050 /
27SiMn 0.24-0.32 1.10-1.40 1.10-1.40 0.035 0.035 0.300
20# 0.17-0.24 0.17-0.37 0.35-0.65 0.035 0.035 0.250

 

Mechanical Properties

Delivery condition

BKS

Cold Drawn & Stress-Relieved

Steel Grade

Rm MPa

ReH MPa

Elongation A5(%)

ST45

≥520

≥375

≥15

ST52(E355)

≥600

≥520

≥14

SAE1026

≥600

≥510

≥15

16Mn

≥600

≥520

≥14

20#

≥520

≥375

≥15

 

Delivery condition:BKS Cold Drawn&Stress-Relieved

Steel Grade Rm MPa(≥) ReH MPa(≥) Elongation A5(%)(≥)
ST45 520 375 15
ST52(E355) 600 520 14
SAE1026 600 510 15
16Mn 600 520 14
20# 520 375 15

Quality measurement system

  2.jpg

 
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