12Х18Н10Т Seamless stainless steel tube is manufactured in accordance with GOST 9941-81 standard, GOST 9941-81 12Х18Н10Т pipes are made of corrosion-resistant steel by cold- and heat-deformed processes. The requirements of GOST 9941-81 concern not only the geometric parameters of seamless stainless steel pipes but also the technical characteristics of tubes. 12Х18Н10Т pipes are used under constant exposure to high-pressure and high-temperature conditions.
The outer diameter of the 12Х18Н10Т seamless tube is in the range of 5–273 mm, and the walls have a thickness from 2 to 22 mm, for seamless pipes, the outside diameter ranges from 1/4″ to 30″ and wall thickness ranges from SCH 5 to SCH 180, all the pipes are strictly produced and tested conforming to GOST 9941-81.
GOST9941-81 12X18H10T Seamless Stainless Steel Tube Specifications
| Standard | GOST9941-81 |
|---|---|
| Stainless Steel | 12X18H10T |
| ASTM | 304, 304L, 304H, 304N, 310S, 316,T 316L, 316Ti, 316H, 317,TP317L, 321, 321H, 347, 347H, 904L |
| Russia material | 08Х17Т, 08Х13, 12Х13, 12Х17, 15Х25Т, 04Х18Н10, 08Х20Н14С2, 08Х18Н12Б, 10Х17Н13М2Т, 10Х23Н18, 08Х18Н10, 08Х18Н10Т, 08Х18Н12Т, 08Х17Н15М3Т, 12Х18Н10Т, 12Х18Н12Т, 12Х18Н9, 17Х18Н9, 08Х22Н6Т, 06ХН28МДТ |
| Tube Type | Cold rolled & cold drawn Seamless Tube |
| Finishes | Annealing Pickling Bright Annealing |
| Outside Diameter | 6 – 610 mm |
| Thickness | 0.5 – 30 mm |
| Length | Fixed And Random Length |
| Application | 1. General service 2. Curatorial Industry 3. Food Industry 4. Ornamental 5. Aerospace Industry 6. Petrochemical 7. Fluid transport 8. Nuclear Industry 9. Boiler heat- exchanger 10. Oil and gas service |
12Х18Н10Т Chemical Composition (%)
| C | Si | Mn | P | S | Cr | Ni | Cu * | Mo * | Ti * | W * | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Min | – | – | – | – | – | 17 | 9 | – | – | – | – |
| Max | 0.12 | 0.8 | 2 | 0.035 | 0.02 | 19 | 11 | 0.3 | 0.5 | 0.8 | 0.2 |
12KH18N10T (GOST ) Equivalents
| EU EN | USA – | Germany DIN, WNr | Japan JIS | England BS | China GB | Russia GOST |
|---|---|---|---|---|---|---|
| X6CrNiTi18-10 (1.4541) | 321 | X10CrNiTi18-9 X6CrNiTi18-10 | SUS321 | 321S31 | 0Cr18Ni10Ti 1Cr18Ni11Ti H0Cr20Ni10Ti | 08KH18N10T 08KH18N12T 12KH18N10T |
Outside Diameter & Tolerance
| Outside Diameter, mm | Tolerance | ||
|---|---|---|---|
| Normal | High | Higher | |
| 5≤OD≤10 | ±0.3mm | ±0.2mm | ±0.15mm |
| 10＜OD≤30 | ±0.4mm | ±0.3mm | ±0.2mm |
| 30＜OD≤95 | ±1.2% | ±1.0% | ±0.8% |
| OD>95 | ±1.0% | ±1.0% | ±0.8% |
Wall thickness & Tolerance
| Wall Thickness, mm | Tolerance | ||
|---|---|---|---|
| Normal | High | Higher | |
| 0.2 | ±0.05mm | ±0.03mm | – |
| 0.3≤WT≤0.4 | ±0.07mm | ±0.05mm | – |
| 0.5≤WT≤0.6 | ±0.10mm | ±0.07mm | – |
| 0.7≤WT≤1 | ±0.15mm | ±0.10mm | – |
| 1＜WT≤3 | +12.5/-15% | ±12.5% | +12.5/-10% |
| 3＜WT≤7 | ±12.5% | +12.5/-10% | ±10% |
| WT>7 | +12.5/-10% | ±10% | – |
Mechanical Properties
| Steel grade | Point of maximum load δВ, N/mm2 (kgf/mm2) | Elongation δ5, % | Density ρ, g/cm3 |
|---|---|---|---|
| No less than | |||
| 08Х17Т | 372 (38) | 17 | 7.70 |
| 08Х13 | 372 (38) | 22 | 7.70 |
| 12Х13 | 392 (40) | 22 | 7.70 |
| 12Х17 | 441 (45) | 17 | 7.70 |
| 15Х25Т | 461 (47) | 17 | 7.60 |
| 04Х18Н10 | 490 (50) | 45 | 7.90 |
| 08Х20Н14С2 | 510 (52) | 35 | 7.70 |
| 10Х17Н13М2Т | 529 (54) | 35 | 8.00 |
| 08Х18Н12Б | 529 (54) | 37 | 7.90 |
| 10Х23Н18 | 529 (54) | 35 | 7.95 |
| 08Х18Н10 | 529 (54) | 37 | 7.90 |
| 08Х18Н10Т | 549 (56) | 37 | 7.90 |
| 08Х18Н12Т | 549 (56) | 37 | 7.95 |
| 08Х17Н15М3Т | 549 (56) | 35 | 8.10 |
| 12Х18Н10Т | 549 (56) | 35 | 7.95 |
| 12Х18Н12Т | 549 (56) | 35 | 7.90 |
| 12Х18Н9 | 549 (56) | 37 | 7.90 |
| 17Х18Н9 | 568 (58) | 35 | 7.90 |
| 08Х22Н6Т | 588 (60) | 20 | 7.60 |
| 05ХН28МДТ | 490 (50) | 30 | 7.96 |
The yield stress for tubes made from steel of grade 12X18H10T shall be no less than 216 N/mm2 (22 kgf/mm2).
TECHNICAL REQUIREMENTS of GOST9941-81 12X18H10T Seamless Stainless Steel Tube
The tubes shall be produced in compliance with the requirements of this Standard and production schedules approved in compliance with the established procedure.
The tubes shall be produced from steel of grades (types) specified in the above table, with chemical composition in compliance with GOST 5632-72. It shall be allowed to produce tubes with microadding of rare-earth metals. The contents of sulfur in steel for tubes, liable to be welded, shall not exceed 0.02 %.
The tubes shall be heat-treated. At the customer’s request, the tubes may be produced without heat treatment and clarification of the surface. The standards of mechanical characteristics and curvature of tubes without heat treatment shall be stipulated by agreement between the manufacturer and the customer.
The surface of the tubes shall be light. The mat surface with gray tint caused by method of production and grade of steel shall be allowed. It shall be allowed to produce tubes without the subsequent etching after heat treatment in protective atmosphere or vacuum with temper colors on a surface.
A batch shall consist of tubes of one dimension regarding diameter and wall thickness, one grade of steel and one type of heat treatment, and at the customer’s request of one smelt, and accompanied by one quality certificate in compliance with GOST 10692-80 with addition: chemical composition in compliance with quality certificate for tube preform, and also information about the heat treatment.
Each tube shall be subjected to surface, dimension, hydraulic pressure and ultrasonic tests. The following quantity of tubes shall be selected for quality control:
two tubes for extension test;
one tube for flattening or expansion test;
two tubes for intergranular corrosion test.
Marking, packing, transportation and storage shall be carried out in compliance with GOST 10692-80.