1. Standard Overview
This standard covers seamless steel tubes for steam boilers and pipelines, including cold drawn, hot rolled, hot pressed and reduced tubes. Dimensions: hot rolled tubes OD 25-530 mm, wall thickness 2.5-90 mm; cold drawn tubes OD 25-108 mm, wall thickness 2.0-25 mm. Lengths: random 3-12 m (hot rolled 4-12 m), fixed lengths as required. Tolerances: OD +-0.25 mm to +-1.25%, wall thickness +-8% to +20%/-5% depending on size. Straightness: 1.5-4.0 mm per meter based on wall thickness.
2. Material Grades and International Cross Reference
| Russian Grade | China GB | USA ASTM | Europe EN | Japan JIS | Germany DIN |
|---|---|---|---|---|---|
| 20 | 20# / 20G | A106 Gr.B | P235GH | STB42 | St45.8 |
| 20-PV | 20# high purity | - | - | - | - |
| 15GS | 15Mn | - | - | SB46 | 14Mn4 |
| 15KhM | 15CrMo | A387 Gr.11 | 13CrMo4-5 | SCM415 | 13CrMo44 |
| 12Kh1MF | 12Cr1MoV | - | - | - | 13CrMoV42 |
| 12Kh1MF-PV | 12Cr1MoV high purity | - | - | - | - |
| 15Kh1M1F | 15Cr1Mo1V | - | - | - | 15CrMoV5-9 |
| 12Kh2MFSR | - | - | - | - | - |
| 10Kh9MFB-Sh | 10Cr9Mo1VNb | A335 P91/T91 | X10CrMoVNb9-1 | - | - |
| 12Kh11V2MF | - | - | - | - | - |
| 08Kh16N9M2 | 06Cr16Ni9Mo2 | - | - | - | - |
| 12Kh18N12T | 06Cr18Ni12Ti | AISI 321 | X6CrNiTi18-10 | SUS321 | X6CrNiTi18-10 |
| 10Kh13G12BS2N2D2 | - | - | - | - | - |
Note: PV means produced with direct reduced iron, Sh means electroslag remelting, both give higher purity.
3. Chemical Composition and Mechanical Properties Quick Reference
| Grade | C max | Cr | Mo | V | Others | Yield MPa | Tensile MPa | Elongation % | Impact J/cm2 | Max Service Temp |
|---|---|---|---|---|---|---|---|---|---|---|
| 20 | 0.24 | <=0.25 | - | - | Mn 0.35-0.65 | >=216 | 412-549 | >=24 | >=49 | <=450 C |
| 15GS | 0.18 | <=0.30 | - | - | Mn 1.10-1.40 | >=294 | >=490 | >=18 | >=45 | - |
| 15KhM | 0.18 | 0.80-1.10 | 0.40-0.55 | - | - | >=235 | 441-637 | >=21 | >=50 | 500-550 C |
| 12Kh1MF | 0.15 | 0.90-1.20 | 0.25-0.35 | 0.15-0.30 | - | >=274 | 441-637 | >=21 | >=55 | 570-585 C |
| 15Kh1M1F | 0.16 | 1.10-1.40 | 0.90-1.10 | 0.20-0.25 | - | >=320 | >=500 | >=18 | >=500 | <=585 C |
| 12Kh2MFSR | 0.15 | 1.60-1.90 | 0.50-0.70 | 0.20-0.35 | B 0.002-0.005 | >=274 | >=470 | >=21 | - | <=620 C |
| 10Kh9MFB-Sh | 0.12 | 8.0-10.0 | 0.90-1.10 | 0.18-0.30 | Nb 0.06-0.12 | >=400 | >=600 | >=19 | >=55 | 600-650 C |
| 12Kh11V2MF | 0.12 | about 11 | about 0.85 | about 0.2 | W about 2, Ni about 1 | >=392 | >=588 | >=17 | >=25 | - |
| 08Kh16N9M2 | 0.08 | 15-17 | 2.0-2.5 | - | Ni 8-10 | 216-294 | >=529 | >=35 | - | - |
| 12Kh18N12T | 0.12 | 17-19 | - | - | Ni 11-13, Ti >=5C | 216-392 | 539-686 | >=35 | - | <=600 C (pipe up to 800 C for short term) |
| 10Kh13G12BS2N2D2 | 0.10 | 12-14 | - | - | Mn 11-13, Ni about 2, Cu about 2, Nb | >=216 | >=588 | >=22 | >=50 | - |
Transverse properties are slightly lower; refer to standard table 14 for exact values.
4. Heat Treatment (Typical)
| Grade | Process |
|---|---|
| 20 | Normalize 920-950 C |
| 15GS | Normalize 900-930 C, optional temper 630-670 C |
| 15KhM | Normalize 930-960 C + temper 680-730 C |
| 12Kh1MF | Normalize 950-980 C + temper 720-750 C |
| 15Kh1M1F | Normalize 970-1000 C + temper 730-760 C (for thick walls >=10 h) |
| 12Kh2MFSR | Normalize 970-1000 C + temper 750-780 C |
| 10Kh9MFB-Sh | Normalize 1030-1050 C + temper 730-750 C |
| 12Kh11V2MF | Normalize 1020-1050 C + temper 750-780 C |
| Austenitic stainless steels | Solution treatment 1030-1200 C, air or water cool |
5. Inspection Requirements
100% mandatory: dimensional check, surface inspection, ultrasonic testing (for longitudinal defects), and hydrostatic test. Per batch sampling: chemical analysis (3 pieces per heat), room temperature tensile (2%), impact (2%), hardness, and process tests (flaring, flattening, bending). Additional tests on customer request: high temperature tensile, creep rupture strength, intergranular corrosion (for stainless), transverse ultrasonic, etc.
6. Color Code (Quick Table)
| Grade | Color | Grade | Color |
|---|---|---|---|
| 20 | Green | 15Kh1M1F | White |
| 20-PV | Blue | 12Kh2MFSR | Blue |
| 15GS | Brown | 10Kh9MFB-Sh | Purple |
| 15KhM | Yellow | 12Kh11V2MF | Black |
| 12Kh1MF | Red | 12Kh18N12T | Not specified |
7. Key Notes
This TU standard is stricter than GOST and is specially designed for supercritical and ultra-supercritical boiler applications.
The three core heat-resistant grades are 12Kh1MF (570-585 C), 15Kh1M1F (<=585 C), and 12Kh2MFSR (<=620 C).
10Kh9MFB-Sh is approximately equivalent to P91, but composition and inspection details differ; verify before substitution.
100% ultrasonic testing is mandatory, using standard reference samples (SOP) for defect evaluation.
Among austenitic grades, 12Kh18N12T offers the highest temperature resistance (up to 800 C for short-term pipe service).
8. About Sanonpipe
We supply all grades covered by this standard, with complete size range (OD 25-530 mm, wall 2.5-90 mm). We provide EN 10204 3.1/3.2 certificates, fast delivery from stock (emergency orders in 7-15 days), and support CBAM carbon footprint compliance. Full technical clarification and documentation services are available.
SANONPIPE
Tel: 022-58658800/+8615320100890
Email: Info@Sanonpipe.Com
Website: www.sanonpipe.com
Post time: Jul-31-2026
