Application
It is mainly used to make high-quality alloy steel boiler pipe , heat exchanged pipe, high pressure steam pipe for petroleum and chemical industry
Grade of high-quality alloy pipe :P1,P2,P5,P9,P11,P22,P91,P92 etc
India, UAE , Pakistian
For Inida market main Grade steel is P11, P22, p9, P5, P91.
ASTM A335 P9 is equal to GB9948 or GB 6479 1Cr9Mo
ASTM A335 P22 is equal to GB5310 12Cr2MoG
ASTM A335 P11 is equal to GB5310 14Cr1MoG
ASTM A335 P5 is equal to GB5310 1Cr5MoG
ASTM A335 P91 is equal to GB5310 10Cr9Mo1VNbN
Differece of GB9948 and GB6479 in Application:
GB9948 is Seamless Steel Tubes For Petroleum Cracking
GB6479 is Seamless steel tubes for high-pressure For chemical fertilizer equipments
| Sequence No. | Items to test | Test method | Quantity for sampling | Standard |
| 1 | Chemical composition | GB/T222 GB/T223 GB/4336 |
One sample for each furnace | GB6479/GB9948 |
| 2 | Tensile test | GB/T 228 | One sample respectively taken from two tubes of each batch |
GB6479/GB9948 |
| 3 | Impact test | GB/T 229 | Three samples respectively taken from two tubes of each batch |
GB6479/GB9948 |
| 4 | Hydraulic test | GB/T 241 | Piece by piece | GB6479/GB9948 |
| 5 | Press-flat test | GB/T 246 | One sample respectively taken from two tubes of each batch |
GB6479/GB9948 |
| 6 | Opening expansion test | GB/T 242 | GB6479/GB9948 | |
| 7 | Low-fold test | GB/T 226 GB/T 1979 |
GB6479/GB9948 | |
| 8 | Non-metal inclusion | GB/T 10561 | GB6479/GB9948 | |
| 9 | Ultrasonic testing | GB/T 5777 | Piece by piece | GB6479/GB9948 |
| 10 | Eddy testing | GB/T 7735 | GB6479/GB9948 | |
| 11 | Leaking magnetic testing | GB/T 12606 | GB6479/GB9948 | |
| 12 | Hardness Test | GB/T231.1 | One sample respectively taken from two tubes of each batch |
GB9949 |
Chemical Component
| GB6479 | C | Si | Mn | Cr | Mo | V | Ti | NB | Ni | Cu | P | S |
| 1Cr5Mo | ≤0.15 | ≤0.5 | ≤0.6 | 4-6 | 0.45-0.6 | / | / | / | ≤0.6 | ≤0.2 | ≤0.03 | ≤0.03 |
| GB9948 | C | Si | Mn | Cr | Mo | V | Ti | NB | Ni | Cu | P | S |
| 1Cr5Mo | ≤0.15 | ≤0.5 | ≤0.6 | 4-6 | 0.45-0.6 | / | / | / | ≤0.6 | ≤0.2 | ≤0.03 | ≤0.02 |
| Grade | UN | C≤ | Mn | P≤ | S≤ | Si≤ | Cr | Mo |
| Sequiv. | ||||||||
| P1 | K11522 | 0.10~0.20 | 0.30~0.80 | 0.025 | 0.025 | 0.10~0.50 | – | 0.44~0.65 |
| P2 | K11547 | 0.10~0.20 | 0.30~0.61 | 0.025 | 0.025 | 0.10~0.30 | 0.50~0.81 | 0.44~0.65 |
| P5 | K41545 | 0.15 | 0.30~0.60 | 0.025 | 0.025 | 0.5 | 4.00~6.00 | 0.44~0.65 |
| P5b | K51545 | 0.15 | 0.30~0.60 | 0.025 | 0.025 | 1.00~2.00 | 4.00~6.00 | 0.44~0.65 |
| P5c | K41245 | 0.12 | 0.30~0.60 | 0.025 | 0.025 | 0.5 | 4.00~6.00 | 0.44~0.65 |
| P9 | S50400 | 0.15 | 0.30~0.60 | 0.025 | 0.025 | 0.50~1.00 | 8.00~10.00 | 0.44~0.65 |
| P11 | K11597 | 0.05~0.15 | 0.30~0.61 | 0.025 | 0.025 | 0.50~1.00 | 1.00~1.50 | 0.44~0.65 |
| P12 | K11562 | 0.05~0.15 | 0.30~0.60 | 0.025 | 0.025 | 0.5 | 0.80~1.25 | 0.44~0.65 |
| P15 | K11578 | 0.05~0.15 | 0.30~0.60 | 0.025 | 0.025 | 1.15~1.65 | – | 0.44~0.65 |
| P21 | K31545 | 0.05~0.15 | 0.30~0.60 | 0.025 | 0.025 | 0.5 | 2.65~3.35 | 0.80~1.60 |
| P22 | K21590 | 0.05~0.15 | 0.30~0.60 | 0.025 | 0.025 | 0.5 | 1.90~2.60 | 0.87~1.13 |
| P91 | K91560 | 0.08~0.12 | 0.30~0.60 | 0.02 | 0.01 | 0.20~0.50 | 8.00~9.50 | 0.85~1.05 |
| P92 | K92460 | 0.07~0.13 | 0.30~0.60 | 0.02 | 0.01 | 0.5 | 8.50~9.50 | 0.30~0.60 |
A New designation established in accordance with Practice E 527 and SAE J1086, Practice for Numbering Metals and Alloys (UNS). B Grade P 5c shall have a titanium content of not less than 4 times the carbon content and not more than 0.70 %; or a columbium content of 8 to 10 times the carbon content.
| Mechanical properties | P1,P2 | P12 | P23 | P91 | P92,P11 | P122 |
| Tensile strength | 380 | 415 | 510 | 585 | 620 | 620 |
| Yield strength | 205 | 220 | 400 | 415 | 440 | 400 |
| Grade | Heat Treatment Type | Normalizing Temperature Range F [C] | Subcritical Annealing or Tempering |
| P5, P9, P11, and P22 | Temperature Range F [C] | ||
| A335 P5 (b,c) | Full or Isothermal Anneal | ||
| Normalize and Temper | ***** | 1250 [675] | |
| Subcritical Anneal (P5c only) | ***** | 1325 – 1375 [715 - 745] | |
| A335 P9 | Full or Isothermal Anneal | ||
| Normalize and Temper | ***** | 1250 [675] | |
| A335 P11 | Full or Isothermal Anneal | ||
| Normalize and Temper | ***** | 1200 [650] | |
| A335 P22 | Full or Isothermal Anneal | ||
| Normalize and Temper | ***** | 1250 [675] | |
| A335 P91 | Normalize and Temper | 1900-1975 [1040 - 1080] | 1350-1470 [730 - 800] |
| Quench and Temper | 1900-1975 [1040 - 1080] | 1350-1470 [730 - 800] |
In addition to ensuring chemical composition and mechanical properties, hydrostatic tests are performed one by one, Nondestructive Examination ,Product Analysis , Metal Structure and Etching Tests ,Flattening test etc.
Supply Ability: 2000 Tons Per Month Per Grade of ASTM A335 Alloy Steel Pipe
In Bundles And In Strong Wooden Box
7-14 days if in stock, 30-45 days to produce
30% depsoit, 70% L/C or B/L copy or 100% L/C at sight