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| Brand Name: | Torich |
| Model Number: | GB 9948 |
| MOQ: | 5T |
| Price: | negotiable |
| Payment Terms: | D/A, L/C, D/P, T/T, Western Union, MoneyGram |
| Supply Ability: | 60000Ton Per Year |
Product name: GB 9948 Material10#20# 12CrMo 15CrMo 12Cr1MoV Petroleum Cracking Seamless Steel Tubes
Out Diameter: 3~500mm
Wall Thickness: 0.5~50mm
Application: It is used for the seamless steel tubes for furnace,heat exchangers, Petroleum Cracking etc.
Table1 The Tolerances of Outer Diameter and Wall Thickness Unit:mm
| Sort Code | Manufacuring Method | Nominal Size | Tolerances | ||
| Common Level | High Level | ||||
| W-H | Hot Rolling (Extrusion) | Outer Diameter D | ≤54 | ±0.50 | ±0.30 |
| ＞54~325 | ±1%D | ±0.75%D | |||
| ＞325 | ±1%D | - | |||
| Wall Thicknass S | ≤20 | +15%S -10%S | ±10%S | ||
| ＞20 | +12.5%S -10%S | ±10%S | |||
| Hot Expand | Outer Diameter D | All | ±1%D | ||
| Wall Thicknass S | All | ±15%S | |||
| W-C | Cold Drawn(Rolling) | Outer Diameter D | ≤25.4 | ±0.15 | |
| ＞25.4~40 | ±0.20 | ||||
| ＞40~50 | ±0.25 | ||||
| ＞50~60 | ±0.30 | ||||
| ＞60 | ±0.75%D | ±0.5%D | |||
| Wall Thicknass S | ≤3.0 | ±0.3 | ±0.2 | ||
| ＞3.0 | ±10%S | ±7.5%S | |||
Table2 The Tolerance of Minimum Wall Thickness Unit :mm
| Sort Code | Manufacturing Method | Minimum Wall Thickness Smin | Tolerance | |
| Common Level | High Level | |||
| W-H | Hot Rolling(Extrusion) | ≤4.0 | +0.90 0 | +0.70 0 |
| ＞4.0 | +25%Smin 0 | +22%Smin 0 | ||
| W-C | Cold Drawn(Rolling) | ≤3.0 | +0.6 0 | +0.4 0 |
| ＞3.0 | +20%Smin 0 | +15%Smin 0 | ||
Table3 Steel grade and chemical composition
| Steel grade | Chemical composition % | |||||||||||
| C | Si | Mn | Cr | Mo | Ni | Nb | Ti | V | Cu | P | S | |
| ≤ | ||||||||||||
| 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~ 0.018 | 0.17~ 0.37 | 0.40~ 0.70 | 0.80~ 1.10 | 0.40~ 0.55 | ≤ 0.30 | — | — | — | ≤0.20 | 0.025 | 0.015 |
| 12CrlMo | 0.08~ 0.15 | 0.50~ 1.00 | 0.30~ 0.60 | 1.00~ 1.50 | 0.45~ 0.65 | ≤ 0.30 | — | — | — | ≤0.20 | 0.025 | 0.015 |
| 12CrlMoV | 0.08~ 0.15 | 0.17~ 0.37 | 0.40~ 0.70 | 0.90~ 1.20 | 0.25~ 0.35 | ≤ 0.30 | — | — | 0.15~ 0.30 | ≤0.20 | 0.025 | 0.015 |
| 12Cr2Mo | 0.08~ 0.15 | ≤0.50 | 0.40~ 0.60 | 2.00~ 2.50 | 0.90~ 1.13 | ≤ 0.30 | — | — | — | ≤0.20 | 0.025 | 0.015 |
| 12Cr5MoI 12Cr5MoNT | ≤ 0.15 | ≤0.50 | 0.30~ 0.60 | 4.00~ 6.00 | 0.45~ 0.60 | ≤ 0.60 | — | — | — | ≤0.20 | 0.025 | 0.015 |
| 12Cr9MoI 12Cr9MoNT | ≤ 0.15 | 0.25~ 1.00 | 0.30~ 0.60 | 8.00~ 10.00 | 0.90~ 1.10 | ≤ 0.60 | — | — | — | ≤0.20 | 0.025 | 0.015 |
| 07Cr19Ni10 | 0.04~ 0.10 | ≤ 1.00 | ≤2.00 | 18.00~ 20.00 | — | 8.00~ 11.00 | — | — | — | — | 0.030 | 0.015 |
| 07Cr18Ni11Nb | 0.04~ 0.10 | ≤ 1.00 | ≤2.00 | 17.00~ 19.00 | — | 9.00~ 12.00 | 8C~ 1.10 | — | — | — | 0.030 | 0.015 |
| 07Cr19Ni11NTi | 0.04~ 0.10 | ≤0.75 | ≤2.00 | 17.00~ 20.00 | — | 9.00~ 13.00 | — | 4C~ 0.60 | — | — | 0.030 | 0.015 |
| 022Cr17Ni12Mo2 | ≤ 0.30 | ≤1.00 | ≤2.00 | 16.00~ 18.00 | 2.00~ 3.00 | 10.00~ 14.00 | — | — | — | — | 0.030 | 0.015 |
Table4 Heat Treatment Standard
| Steel Grade | Heat Treatment Standard |
| 10a | Normalizing；At Temperature 880℃~940℃ |
| 20a | Normalizing:At Temperature 880℃~940℃ |
| 12CrMob | Normalizing:At Temperature 900℃~960℃ Tempering:At Temperature 670℃~730℃ |
| 15CrMob | Normalizing:At Temperature 900℃~960℃ Tempering:At Temperature 680℃~730℃ |
| 12Cr1Mob | Normalizing:At Temperature 900℃~960℃ Tempering:At Temperature 680℃~750℃ |
| 12Cr1MoVb | S≤30mm:Normalizing:At Temperature 980℃~1020℃ Tempering:At Temperature 720℃~760℃ S＞30mm:Quenching:At Temperature 950℃~990℃ Tempering:At Temperature 720℃~760℃ Or Normalizing:At Temperature 980℃~1020℃ (rapid cooling after Normalizing) Tempering:At Temperature 720℃~760℃ |
| 12Cr2Mob | S≤30mm:Normalizing:At Temperature 900℃~960℃ Tempering:At Temperature 700℃~750℃ S＞30mm:Quenching:At Temperature ≥ 900℃ Tempering:At Temperature 700℃~750℃ Or Normalizing:At Temperature 900℃~960℃ (rapid cooling after Normalizing) Tempering:At Temperature 700℃~750℃ |
| 12Cr5MoI | Full Annealing or isothermal annealing |
| 12Cr5MoNT | Normalizing:At Temperature 930℃~980℃ Tempering:At Temperature 730℃~770℃ |
| 12Cr9MoI | Full Annealing or isothermal annealing |
| 12Cr9MoNT | Normalizing:At Temperature 890℃~950℃ Tempering:At Temperature 720℃~800℃ |
| 07Cr19Ni10 | Treatment with solid solving:At Temperature ≥ 1040℃ (rapid cooling after Treatment)
|
| 07Cr18Ni11Nb | Treatment with solid solving: For Hot Rolled Tube At Temperature ≥ 1050℃ For Cold Drawn(rolled)Tube At Temperature ≥ 1100℃ (rapid cooling after Treatment)
|
| 07Cr19Ni11Ti | Treatment with solid solving: For Hot Rolled Tube At Temperature ≥ 1050℃ For Cold Drawn(rolled)Tube At Temperature ≥ 1100℃ (rapid cooling after Treatment)
|
Table5 Mechanical Property
| Steel Grade | Tensile Strength Rm/MPa | Lower yield strength Rp0.2/MPa | Elongation A/％ | Shock absorption KV2/J | Brinell hardness | ||
| Longitudinal direction | Transverse | Longitudinal direction | Transverse | ||||
| ≥ | ≤ | ||||||
| 10 | 335~475 | 205 | 25 | 23 | 40 | 27 | - |
| 20 | 410~550 | 245 | 24 | 22 | 40 | 27 | - |
| 12CrMo | 410~560 | 205 | 21 | 19 | 40 | 27 | 156HBW |
| 15CrMo | 440~640 | 295 | 21 | 19 | 40 | 27 | 170HBW |
| 12Cr1Mo | 415~560 | 205 | 22 | 20 | 40 | 27 | 163HBW |
| 12Cr2MoV | 470~640 | 255 | 21 | 19 | 40 | 27 | 179HBW |
| 12Cr2Mo | 450~600 | 280 | 22 | 20 | 40 | 27 | 163HBW |
| 12Cr5MoI | 415~590 | 205 | 22 | 20 | 40 | 27 | 163HBW |
| 12Cr5MoNT | 480~640 | 280 | 20 | 18 | 40 | 27 | - |
| 12Cr9MoI | 460~640 | 210 | 20 | 18 | 40 | 27 | 179HBW |
| 12Cr9MoNT | 590~740 | 390 | 18 | 16 | 40 | 27 | - |
| 07Cr19Ni10 | ≥520 | 205 | 35 | - | - | 187HBW | |
| 07Cr18Ni11Nb | ≥520 | 205 | 35 | - | - | 187HBW | |
| 07Cr19Ni11Ti | ≥520 | 205 | 35 | - | - | 187HBW | |
| 022Cr17Ni12Mo2 | ≥485 | 170 | 35 | - | - | 187HBW | |
| If the wall thickness of the tube is less than 5mm, doesn’t have to do the hardness test | |||||||
Table6 Impact energy absorption attenuation factor of small sample
| Specimen | Specimen size(heightXwidth)mm | Attenuation factor |
| Standard sample | 10X10 | 1.00 |
| Small sample | 10X7.5 | 0.75 |
| Small sample | 10X5 | 0.50 |
Table7 Diameter flaring rate of steel tubes
| Steel | Diameter flaring rate of steel tubes/% | ||
| ID/OD | |||
| ≤0.6 | ＞0.6~0.8 | ＞0.8 | |
| Carbon structural steel | 10 | 12 | 17 |
| Alloy structural steel | 8 | 10 | 15 |
| Stainless(heat resistance)steel | 12 | 15 | 20 |
Table8 Testing items and sampling quantity of steel tubes
| Number | Testing items | Sampling quantity |
| 1 | Chemical composition | 1 sample from each furnace |
| 2 | Tensile test | 1 sample from each of two steel tubes on each batch |
| 3 | Hardness test | 3 samples taken on 2 steel tubes on each batch |
| 4 | Impact test | All |
| 5 | Hydraulic test | 1 sample from each of two steel tubes on each batch |
| 6 | Flattening test | 2 samples taken on 2 steel tubes on each batch |
| 7 | Bending test | 1 sample taken on 2 steel tubes on each furnace |
| 8 | Flaring test | 2 samples taken on 2 steel tubes on each batch |
| 9 | Macroscopic examination | 1 sample taken on 2 steel tubes on each furnace |
| 10 | Non-metallic inclusions | 1 sample taken on 2 steel tubes on each furnace |
| 11 | Eddy current testing | All |
| 12 | Magnetic flux leakage detection | All |
| 13 | Ultrasonic testing | All |
| 14 | Intergranular corrosion test | 1 sample from each of two steel tubes on each batch |
Table A.1 Comparison Table of Similar Steel Grade
| No. | GB | Similar Steel Grade | |||
| ISO | EN | ASTM/ASME | JIS | ||
| 1 | 10 | - | P195GH | A | STB 340 |
| 2 | 20 | PH26 | P235GH | A-1,B | STB 410 |
| 3 | 12CrMo | - | - | T2/P2 | STBA 20 |
| 4 | 15CrMo | 13CrMo4-5 | 13CrMo4-5 | T12/P12 | STBA 22 |
| 5 | 12Cr1Mo | - | 10CrMo5-5 | T11/P11 | STBA 23 |
| 6 | 12Cr1MoV | - | - | - | - |
| 7 | 12Cr2Mo | 10CrMo9-10 | 10CrMo9-10 | T22/P22 | STBA 24 |
| 8 | 12Cr5Mo-I | X11CrMo9-1TA | X11CrMo5+I | T5/P5 | STBA 25 |
| 9 | 12Cr5Mo-NT | - | X11CrMo5+NT | T5/P5 | STBA 25 |
| 10 | 12Cr9Mo-I | X11CrMo9-1TA | X11CrMo9-1+I | T9/P9 | STBA 26 |
| 11 | 12Cr9Mo-NT | - | X11CrMo9-1+NT | T9/P9 | STBA 26 |
| 12 | 07Cr19Ni10 | X7CrNi18-9 | X6CrNi18-10 | TP304H | SUS 304H TB |
| 13 | 07Cr18Ni11Nb | X7CrNiNb18-10 | X7CrNiNb18-10 | TP347H | SUS 347H TB |
| 14 | 07Cr19Ni11Ti | - | X6CrNiTi18-10 | TP321H | SUS 321H TB |
| 15 | 022Cr17Ni12Mo2 | - | X2CrNiMo17-12-2 | TP316L | SUS 316L TB |
