CK45 SRB Honed Tube

CK45 SRB Honed Tube
Model
No Model

Product review

Description

CK45 SRB Honed Tube


High Material Grade

C20   CK45   ST52   25Mn   27SiMn Seamless steel

 

 

Well Mechanical Properties

Tensile strength>600 N/mm²  Yield strength>520 N/mm²  Elongation>15%  Hardness>200HB

 

Wide-range spec

OD: 40--500 mm    ID:25--400 mm  Wall thickness: 3--50 mm  Length: 30--8000 mm

 

High precision

Straightness<0.2 mm/1000mm    Roughness Ra<0.2 um    Tolerance: H8

 

International Standard & Certificate 

API    ASTM    BS    DIN    EN    GB    JIS

ISO9001  TS16949


Our Services

 

      1. Price: FOB Shanghai or CIF CFR Price.

2. Delivery time: within 30 days.

3. Packing: Plastic cloth pakage with Bundle. Both end caps.

4. Marking: on request.

5. Mill MTC: Certificate stamped by Mill’s inspection Authority.

6. Payment: 30% advance and balance again BL copy.

7. Negotaiable Documents: One set of commercial Invoice, Packing list. Bill of Lading, Mill Test Certificate. CO.

8. Trade Assurance order is welcomed.Chemical Composition

Steel Grade
C
SI
Mn
P
S
Cr
Ni
Cu
20#
0.17-0.24
0.17-0.37
0.35-0.65
0.035
0.035
0.250
0.250
/
45#
0.42-0.50
0.17-0.37
0.50-0.80
0.035
0.035
0.250
0.300
/
Q345B
≤0.2
≤0.5
1.00-1.60
0.030
0.030
0.300
0.250
0.08
Q345D
≤0.2
≤0.5
1.00-1.60
0.030
0.030
0.250
0.250
0.15
25Mn
0.22-0.29
0.17-0.37
0.70-1.00
0.035
0.035
/
/
/
27SiMn
0.22-0.32
1.10-1.40
1.10-1.40
0.035
0.035
0.300
0.300
/
E355
≤0.2
≤0.55
≤1.6
0.025
0.025
0.250
0.250
/
SAE1026
0.22-0.28
0.15-0.35
0.60-0.90
0.040
0.050
/
/
/
                                                                                  
Steel Grade
Rm Mpa
ReH Mpa
Elonggation
cold finished Rm Mpa
cold finished Elonggation
20#
≥520
≥375
≥15
≥550
≥8
45#
≥600
≥520
≥10
≥640
≥5
16Mn(Q345B /D)
≥600
≥520
≥14
≥640
≥5
25Mn
≥600
≥510
≥15
≥640
≥5
27SiMn
≥760
≥610
≥10
≥800
≥5
St45
≥520
≥375
≥15
≥550
≥5
E355(st52)
≥600
≥520
≥14
≥640
≥5
SAE1026
≥600
≥510
≥15
≥640
≥5

 Technique and tolerance:                            

Working method
range
       ID
H8
H9
H10
cold drawn
25-250
30-50
+0.0390
+0.0620
+0.1000
cold rolling
25-150
50-80
+0.0460
+0.0740
+0.1200
cold drawn-honed
40-250
80-120
+0.0540
+0.0870
+0.1400
cold drawn-SRB
50-250
120-180
+0.0630
+0.1000
+0.1600
cold drawn -polished
40-250
180-250
+0.0720
+0.1150
+0.1850
cold drawn-polish-SRB
50-250
as required
as required
as required
as required