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| Brand Name: | TORICH |
| Model Number: | GB/T12770 |
| MOQ: | 5 ton |
| Price: | negotiable |
| Payment Terms: | L/C, D/A, D/P, T/T, Western Union, MoneyGram |
| Supply Ability: | 50000Ton per year |
Product Name: GB/T12770 Material 12Cr18Ni9 019Cr19Mo2NbTi Welded Stainless Steel Tubes for Mechanical Structures
Size range: O.D.:3-500mm W.T.:0.5-50mm L:2000-12000mm according to customers' actual application and production.
Application : For Mechanical Structures purposes
Steel Grade: 12Cr18Ni9,06Cr19Ni10,022Cr19Ni10,06Cr25Ni20,022Cr22Ni5Mo3N,019Cr19Mo2NbTi,06Cr13Al
Characteristic:
Good concentricity
Good surface quality
Good OD and ID tolerance
High Precision
Stable quality
Smooth Roughness
TORICH QUALITY ASSURANCE
Table1Tolerance of OD
| Classification | Nominal OD | Permissible Tolerance | ||
| PC | PB | PA | ||
| H T | ＜25 | ±0.20 | ±0.15 | ±0.10 |
| ≥25~＜40 | ±0.30 | ±0.25 | ±0.20 | |
| ≥40~＜63 | ±0.50 | ±0.30 | ±0.25 | |
| ≥63~＜90 | ±0.60 | ±0.50 | ±0.40 | |
| ≥90~＜159 | ±0.80 | ±0.65 | ±0.50 | |
| ≥159~＜300 | ±0.8%D | ±0.7%D | ±0.5%D | |
| ≥300~＜610 | ±0.1%D | ±0.8%D | ±0.6%D | |
| ≥10 | protocol | protocol | protocol | |
| WC SP | ＜25 | ±0.15 | ±0.12 | ±0.10 |
| ≥25~＜40 | ±0.20 | ±0.15 | ±0.13 | |
| ≥40~＜50 | ±0.20 | ±0.18 | ±0.15 | |
| ≥50~＜60 | ±0.25 | ±0.20 | ±0.18 | |
| ≥60~＜90 | ±0.30 | ±0.28 | ±0.25 | |
| ≥90~＜100 | ±0.40 | ±0.35 | ±0.30 | |
| ≥100~＜200 | ±0.5%D | ±0.4%D | protocol | |
| ≥200 | protocol | protocol | protocol | |
Table 2Tolerance of WT
| Nominal WT | Permissible Tolerance |
| ＜0.5 | ±0..10 |
| ≥0.5~1.0 | ±0.15 |
| ＞1.0~2.0 | ±0.20 |
| ＞2.0~＜4.0 | ±0.30 |
| ≥4.0 | ±10%S |
Table 3 Bending Degree
| Nominal Wall Thickness/mm | Bending Degree/(mm/m) |
| ≤108 | ≤1.0 |
| ＞108~325 | ≤1.5 |
| ＞325 | ≤2.5 |
Table4 The density of the steel and Calculation of Theoretic Weight
| No. | Steel Grade | Density/(kg/dm3) | The formula after conversion |
| 1 | 12Cr18Ni9 | 7.93 | W=0.02491S(D-S) |
| 2 | 06Cr19Ni10 | ||
| 3 | 022Cr19Ni10 | 7.90 | W=0.02482S(D-S) |
| 4 | 06Cr25Ni20 | 7.98 | W=0.02507S(D-S) |
| 5 | 06Cr17Ni12Mo2 | 8.00 | W=0.02513S(D-S) |
| 6 | 022Cr17Ni12Mo2 | ||
| 7 | 06Cr18Ni11Ti | 8.03 | W=0.02523S(D-S) |
| 8 | 06Cr18Ni11Nb | ||
| 9 | 022Cr22Ni5Mo3N | 7.80 | W=0.02450S(D-S) |
| 10 | 022Cr23Ni5Mo3N | ||
| 11 | 022Cr25Ni7Mo4N | ||
| 12 | 022Cr18Ti | 7.70 | W=0.02491S(D-S) |
| 13 | 019Cr19Mo2NbTi | 7.75 | W=0.02435S(D-S) |
| 14 | 06Cr13Al | ||
| 15 | 022Cr11Ti | ||
| 16 | 022Cr12Ni | ||
| 17 | 06Cr13 |
Table 5 Steel Grade and Chemical Componenet
| No. | Type | Unified digital code | Grade | Chemical Componenet(Quality Fraction)/% | |||||||||
| C | Si | Mn | P | S | Ni | Cr | Mo | N | Others | ||||
| 1 | Austenite | S30210 | 12Cr18Ni9 | ≤0.15 | ≤0.75 | ≤2.00 | ≤0.040 | ≤0.030 | 8~10 | 17~19 | - | ≤0.10 | - |
| 2 | S30408 | 06Cr19Ni10 | ≤0.08 | ≤0.75 | ≤2.00 | ≤0.040 | ≤0.030 | 8~11 | 18~20 | - | - | - | |
| 3 | S30403 | 022Cr19Ni10 | ≤0.030 | ≤0.75 | ≤2.00 | ≤0.040 | ≤0.030 | 8~12 | 18~20 | - | - | - | |
| 4 | S31008 | 06Cr25Ni20 | ≤0.08 | ≤1.50 | ≤2.00 | ≤0.040 | ≤0.030 | 19~22 | 24~26 | - | - | - | |
| 5 | S31608 | 06Cr17Ni12Mo2 | ≤0.08 | ≤0.75 | ≤2.00 | ≤0.040 | ≤0.030 | 10~14 | 16~18 | 2~3 | - | - | |
| 6 | S31603 | 022Cr17Ni12Mo2 | ≤0.08 | ≤0.75 | ≤2.00 | ≤0.040 | ≤0.030 | 10~14 | 16~18 | 2~3 | - | - | |
| 7 | S32168 | 06Cr18Ni11Ti | ≤0.08 | ≤0.75 | ≤2.00 | ≤0.040 | ≤0.030 | 9~12 | 17~19 | - | - | Ti15C~0.70 | |
| 8 | S34778 | 06Cr18Ni11Nb | ≤0.08 | ≤0.75 | ≤2.00 | ≤0.040 | ≤0.030 | 9~12 | 17~19 | - | - | Nb110C~1010 | |
| 9 | Bipolar | S22253 | 022Cr22Ni5Mo3N | ≤0.030 | ≤1.00 | ≤2.00 | ≤0.030 | ≤0.020 | 4.5~6.5 | 21~23 | 2.5~3.5 | 0.08~0.20 | |
| 10 | S22053 | 022Cr23Ni5Mo3N | ≤0.030 | ≤1.00 | ≤2.00 | ≤0.030 | ≤0.020 | 4.5~6.5 | 22~23 | 3~3.5 | 0.14~0.20 | ||
| 11 | S25073 | 022Cr25Ni7Mo4N | ≤0.030 | ≤0.80 | ≤1.20 | ≤0.035 | ≤0.020 | 6~8 | 24~26 | 3~5 | 0.24~0.32 | Cu≤0.50 | |
| 12 | Ferrite | S11863 | 022Cr18Ti | ≤0.03 | ≤0.75 | ≤1 | ≤0.04 | ≤0.03 | (0.60) | 16~19 | - | - | Ti or Nb:0.1~1 |
| 13 | S11972 | 019Cr19Mo2NbTi | ≤0.025 | ≤0.75 | ≤1 | ≤0.04 | ≤0.03 | 1.00 | 17.5~19.50 | 1.75~2.50 | ≤0.035 | (Ti+Nb):[0.2+4(C+N)]~0.8 | |
| 14 | S11348 | 06Cr13Al | ≤0.08 | ≤0.75 | ≤1 | ≤0.04 | ≤0.03 | (0.60) | 11.50~14.50 | - | - | Al:0.1~0.3 | |
| 15 | S11163 | 022Cr11Ti | ≤0.03 | ≤0.75 | ≤1 | ≤0.04 | ≤0.02 | (0.60) | 10.50~11.70 | - | ≤0.030 | Ti≥8(C+N),Ti:0.15~0.50,Nb≤0.10 | |
| 16 | S11213 | 022Cr12Ni | ≤0.03 | ≤0.75 | ≤1.5 | ≤0.04 | ≤0.015 | 0.3~1.00 | 10.50~12.50 | - | ≤0.030 | ||
| 17 | Martensitic | S41008 | 06Cr13 | ≤0.08 | ≤0.75 | ≤1 | ≤0.04 | ≤0.03 | (0.60) | 11.50~13.50 | - | - | - |
| Note:The number in brackets is the maximum allowed to be added. Chemical component of some grade is different from GB/T20878. | |||||||||||||
Table 6 Recommendatory heat treating regime of the steel tubes
| No. | Type | Steel grade | Recommendatory heat treating regime |
| 1 | Austenite | 12Cr18Ni9 | 1010℃~1150℃,water-cooling or other methods of rapid cooling |
| 2 | 06Cr19Ni10 | 1010℃~1150℃,water-cooling or other methods of rapid cooling | |
| 3 | 022Cr19Ni10 | 1010℃~1150℃,water-cooling or other methods of rapid cooling | |
| 4 | 06Cr25Ni20 | 1030℃~1180℃,water-cooling or other methods of rapid cooling | |
| 5 | 06Cr17Ni12Mo2 | 1010℃~1150℃,water-cooling or other methods of rapid cooling | |
| 6 | 022Cr17Ni12Mo2 | 1010℃~1150℃,water-cooling or other methods of rapid cooling | |
| 7 | 06Cr18Ni11Ti | 920℃~1150℃,water-cooling or other methods of rapid cooling | |
| 8 | 06Cr18Ni11Nb | 980℃~1150℃,water-cooling or other methods of rapid cooling | |
| 9 | Dual-phase steel | 022Cr22Ni5Mo3N | 1020℃~1100℃,water-cooling |
| 10 | 022Cr23Ni5Mo3N | 1020℃~1100℃,water-cooling | |
| 11 | 022Cr25Ni7Mo4N | 1025℃~1125℃,water-cooling | |
| 12 | Ferritic | 022Cr18Ti | 780℃~950℃,rapid cooling or slow cooling |
| 13 | 019Cr19Mo2NbTi | 800℃~1050℃,rapid cooling | |
| 14 | 06Cr13Al | 780℃~830℃,rapid cooling or slow cooling | |
| 15 | 022Cr11Ti | 800℃~900℃,rapid cooling or slow cooling | |
| 16 | 022Cr12Ni | 700℃~820℃,rapid cooling or slow cooling | |
| 17 | Martensite | 06Cr13 | 750℃,rapid cooling ；800℃~900℃,slow cooling |
