GOST 9941-81 12X18H12T Seamless Stainless Steel tube For Petrochemical

GOST 9941-81 12X18H12T is a standard for seamless, cold-formed, and hot-formed corrosion-resistant stainless steel pipes suitable for high-pressure, high-temperature, and corrosive environments, such as the petrochemical industry.

GNEE supplies GOST 9941-81 12X18H10T pipes made from corrosion-resistant steel using cold and hot forming processes. The GOST 9941-81 standard requires not only specific geometric parameters for seamless stainless steel pipes but also corresponding technical characteristics. 12X18H10T pipes are suitable for long-term exposure to high pressure and high temperature environments.

The outer diameter range of 12X18H10T seamless pipes is 5–273 mm, with wall thicknesses from 2 to 22 mm; the outer diameter range is 1/4″ to 30″, and the wall thickness ranges from SCH 5 to SCH 180. GNEE ensures fast delivery, supports custom cutting and end processing, and provides complete material certifications, including factory test certificates and third-party corrosion resistance test reports.

12X18H12T Seamless Stainless Steel tube

Applications

Chemical & Petrochemical Processing

Used in heat exchangers, catalytic cracking units, process piping, and reactor internals, capable of withstanding various acidic media and high-temperature environments.

Oil & Gas

Applied in downhole tools, pipelines for sour service (handling sulfur-containing hydrocarbons), and heater tubes in refineries.

Energy & Power Generation

A key material for superheaters, reheaters in power station boilers, and high-pressure steam lines, ensuring long-term, safe operation under high temperatures and pressures.

Specification

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

GOST	ASTM/AISI	GB	JIS	DIN EN/DIN	IS
12X18H12T	AISI 321 / UNS S32100	06Cr18Ni11Ti	SUS 321	X6CrNiTi18-10 (Material Number 1.4541)	321S11 / 321S31

Chemical & Mechanical Properties

GOST 9941-81 12X18H12T Chemical Composition (%)
C	Si	Mn	Cr	Ni	S	P	Ti
≤0.12%	≤0.8%	1.00%-2.00%	17.0%-19.0%	11.0%-13.0%	≤0.02%	≤0.03%	0.50%-0.70%

Mechanical Properties

Property	Standard Value
Tensile Strength	549 MPa
Elongation	35%
Density	7900kg/m³
Operating temperature	400-900℃

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Testing and Inspection

Each tube shall be subjected to the nondestructive electric test or hydrostatic test, Manufacturer Material Test Certification as per EN 10204 3.1 should be provided.

Tensile property, Elongation
Hardness testing, Brinell, Rockwell, Vickers hardness
Flattening testing
Flaring testing
Hydrostatic or Nondestructive test
Intergranular Corrosion Test – ASTM A262/E (option)