Delivery Time:20~30 days after order
Certification:ISO9001, ISO14001, PED
GB 5310 20G 25MnG SEAMLESS ALLOY STEEL HIGH PRESSURE PIPE FOR BOILER
Specifications:
Surface Treatment: Oiling/Black painting/Varnish/Passivation/Phosphating/Pickling
Ends: BE/PE, ends caps
Marking: as per requirement
Size:(mm)
As per standard or as per customer’s requirement
Length: ≤16m. Fixed Length (6m,9m,12m, 16m or as per requirement) or random length
Package: Hexagonal Bundles with steel strips and plastic wrapping outside/Wooden box/Wooden crate/Steel frame/As per customer’s requirement
CHEMICAL COMPOSITION (%):
|
Grade |
Chemical Composition |
||||||
|
C |
Si |
Mn |
P |
S |
Cr |
Mo |
|
|
20G |
0.17~0.23 |
0.17~0.37 |
0.35~0.65 |
≤0.025 |
≤0.015 |
− |
− |
|
20MnG |
0.17~0.23 |
0.17~0.37 |
0.70~1.00 |
≤0.025 |
≤0.015 |
− |
− |
|
25MnG |
0.22~0.27 |
0.17~0.37 |
0.70~1.00 |
≤0.025 |
≤0.015 |
− |
− |
|
15MoG |
0.12~0.20 |
0.17~0.37 |
0.40~0.80 |
≤0.025 |
≤0.015 |
− |
0.25~0.35 |
|
20MoG |
0.15~0.25 |
0.17~0.37 |
0.40~0.80 |
≤0.025 |
≤0.015 |
− |
0.44~0.65 |
|
12CrMoG |
0.08~0.15 |
0.17~0.37 |
0.40~0.70 |
≤0.025 |
≤0.015 |
0.40~0.70 |
0.40~0.55 |
|
⋮ |
⋮ |
⋮ |
⋮ |
⋮ |
⋮ |
⋮ |
⋮ |
MECHNICAL PROPERTIES (Minimum Values) :
|
Grade |
Tensile Strength (MPa) |
Yield Strength(MPa) |
Elongation(%) |
|
20G |
410~550 |
≥245 |
≥24 |
|
20MnG |
415~560 |
≥240 |
≥22 |
|
25MnG |
485~640 |
≥275 |
≥20 |
|
15MoG |
450~600 |
≥270 |
≥22 |
|
20MoG |
415~665 |
≥220 |
≥22 |
|
12CrMoG |
410~560 |
≥205 |
≥21 |
|
⋮ |
⋮ |
⋮ |
⋮ |
DIMENSION TOLERANCE:
|
Processing |
Pipe Sizes (mm) |
Tolerances |
|
|
Cold Drawn |
OD |
≤25.4 |
±0.15 |
|
>25.4~40 |
±0.20 |
||
|
>40~50 |
±0.25 |
||
|
>50~60 |
±0.30 |
||
|
>60 |
±0.5% D |
||
