| Type: | Seamless |
|---|---|
| Technique: | Srb |
| Material: | Alloy, Carbon Steel |
| Surface Treatment: | Bare Pipe |
| Usage: | Boiler Pipe, Hydraulic/Automobile Pipe, Machinery Industry, Chemical Industry, Special Purpose |
| Section Shape: | Round |
| Customization: |
|---|
Suppliers with verified business licenses
Audited Supplier 
Processing form |
I.D.mm |
Length |
Straightness |
I.D.tolerance |
I.D.Roughness(RA) |
Cold-rolled |
30-100 |
≤12M |
0.3-1.0/1000 |
H8-H10 |
0.4-1.6um |
Cold-drawn |
30-250 |
≤12M |
H8-H10 |
0.8-1.6um |
|
Hone |
40-500 |
≤12M |
H8-H9 |
0.4-0.8um |
|
SRB |
50-250 |
≤9M |
H8 |
0.1-0.4um |
Size of inside Diameter(mm) |
ID Tolerance |
Tolerance of wall thickness |
||
30 |
+0.0330 |
+0.0520 |
+0.0840 |
<120mm(OD) ±5% >120mm up to 210mm±7.5% >210mm ±10% |
>30-50 |
+0.0390 |
+0.0620 |
+0.1000 |
|
>50-80 |
+0.0460 |
+0.0740 |
+0.1200 |
|
>80-120 |
+0.0540 |
+0.0870 |
+0.1400 |
|
>120-180 |
+0.0630 |
+0.1000 |
+0.1600 |
|
>180-250 |
+0.0720 |
+0.1150 |
+0.1850 |
|
>250-315 |
+0.0810 |
+0.1300 |
+0.2100 |
|
>315-400 |
+0.0890 |
+0.1400 |
+0.2300 |
|
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 |
Delivery condition |
BK Cold finished(hard) |
BKS Cold drawn and stress-relieved |
|||
Steel grade |
Rm Mpa |
Elongation A5(%) |
Rm MPa |
ReH MPa |
Elonggation A5(%) |
ST45 |
≥550 |
≥5 |
≥520 |
≥375 |
≥15 |
ST52(E355) |
≥640 |
≥5 |
≥600 |
≥520 |
≥14 |
SAE1026 |
≥640 |
≥5 |
≥600 |
≥510 |
≥15 |
16Mn |
≥640 |
≥5 |
≥600 |
≥520 |
≥14 |
20# |
≥550 |
≥8 |
≥520 |
≥375 |
≥15 |
Suppliers with verified business licenses
Audited Supplier 
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