Implementation Standards
Seamless tubes for petroleum cracking (GB9948-2006) are seamless tubes for furnace tubes, heat exchangers and pipes suitable for petroleum refineries.
Applicable Scope
Seamless steel tubes for furnace tubes, heat exchanger tubes and pipes used in petroleum refineries and refineries.
Mechanical Property
|
Grade |
Tensile Strength (Mpa) |
Yield Strength （MPa） |
Elongation Rate portrait （%） |
Elongation Rate transverse （%） |
Absorbed Work portrait （KV2/J） |
Absorbed Work transverse （KV2/J） |
Brinell Hardness （HB） |
|
10 |
410～475 |
≥205 |
≥25 |
≥23 |
≥40 |
≥27 |
|
|
20 |
410～550 |
≥245 |
≥24 |
≥22 |
≥40 |
≥27 |
|
|
15CrMo |
440～640 |
≥295 |
≥21 |
≥19 |
≥40 |
≥27 |
≤170HBW |
|
12CrMo |
410～560 |
≥205 |
≥21 |
≥19 |
≥40 |
≥27 |
≤156HBW |
|
12Cr2Mo |
450～600 |
≥280 |
≥22 |
≥20 |
≥40 |
≥27 |
≤163HBW |
Chemical Composition
|
Name |
Grade |
Chemical Composition % |
|||||||||
|
C |
Si |
Mn |
Cr |
Mo |
Ni |
V |
Cu |
P |
S |
||
|
不大于 |
|||||||||||
|
Petroleum Cracking Tube |
10 |
0.07~0.13 |
0.17~0.37 |
0.35~0.65 |
≤0.15 |
≤0.15 |
≤0.25 |
≤0.08 |
≤0.20 |
0.025 |
0.015 |
|
20 |
0.17~0.23 |
0.17~0.37 |
0.35~0.65 |
≤0.25 |
≤0.15 |
≤0.25 |
≤0.08 |
≤0.20 |
0.025 |
0.015 |
|
|
12CrMo |
0.08~0.15 |
0.17~0.37 |
0.40~0.70 |
0.40~0.70 |
0.40~0.55 |
≤0.30 |
/ |
≤0.20 |
0.025 |
0.015 |
|
|
15CrMo |
0.12~0.18 |
0.17~0.37 |
0.40~0.70 |
0.80~1.10 |
0.40~0.55 |
≤0.30 |
/ |
≤0.20 |
0.025 |
0.015 |
|
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