GOST 9941 08X18H10T Seamless Cold drawn pipe

What is GOST 9941-2022?

The GOST 9941 standard specifies the technical requirements for cold-worked and hot-worked seamless pipes made of corrosion-resistant high-alloy steel (stainless steel). Such pipes are primarily used in industrial environments characterized by high temperatures, high pressures, and highly corrosive conditions, such as the oil and gas, chemical, and power generation sectors.

 

GOST 9941 08X18H10T Pipe Manufacturer

GOST 9941 08X18H10T cold-drawn pipes are equivalent to AISI 321 or EN 1.4541. They feature strictly controlled chemical composition-carbon <=0.08%, chromium 17.0%–19.0%, and nickel 9.0%–11.0%-with a titanium addition of 5×C% to 0.8%. This composition eliminates the risk of intergranular corrosion during welding and high-temperature operation, ensuring excellent chemical stability within the 400℃–800℃ sensitization range; they are ideal for long-term high-temperature service in boilers, heat exchangers, and high-temperature chemical piping.

 

GOST 9941 08X18H10T stainless steel seamless pipes undergo a solution annealing process at 1050℃–1100℃, stabilizing the hardness below 179 HB and minimizing the risk of cracking during subsequent bending, flaring, or pressure impact. With a surface roughness (Ra) better than 0.8 μm, these pipes offer an 11% increase in heat transfer efficiency, significantly improving fluid transport performance and reducing fouling and coking rates.

 

GNEE supplies GOST 9941 08X18H10T cold-drawn seamless pipes with outer diameters ranging from 6 mm to 426 mm, wall thicknesses from 0.5 mm to 30 mm, and lengths up to 12 meters; custom sizes are also available. Each pipe is manufactured from certified raw materials and undergoes rigorous testing-including 100% PMI (Positive Material Identification), Ultrasonic Testing (UT), Eddy Current Testing (ET), hydrostatic testing, dimensional inspection, surface quality checks, and chemical composition analysis-to ensure compliance with GOST and international quality standards. EN 10204 3.1 material certificates and third-party inspection services (SGS, BV, or TUV) can be provided upon customer request.

What is the maximum operating temperature of 08X18H10T?

In an oxidizing atmosphere, the maximum safe continuous service temperature for this material is 800℃–850℃. However, for pressure-bearing heated surfaces, operation below 600℃ is generally recommended to ensure long-term creep strength.

 

What is the difference between 08X18H10T and 12X18H10T?

The primary difference between 08X18H10T and 12X18H10T is their carbon content. Both are  (GOST) titanium-stabilized austenitic stainless steels (similar to global AISI 321 standards), but 08X18H10T is a low-carbon variant.

Chemical Composition of 12X18H10T 08X18H10T AISI 321 Stainless Steel Seamless Tube Pipe

		C		P	S				N
AISI 321		-	-	-	-	-	17,0	9,0	-	5x(C+N)	-
		0,080	2,00	0,045	0,030	1,00	19,0	12,0	0,10	0,70
AISI 321H		0,040	-	-	-	-	17,0	9,0	-	4x(C+N)	-
		0,100	2,00	0,045	0,030	1,00	19,0	12,0	0,10	0,70	-
08X18H10T		-	-	-	-	-	17,0	9,0	-	5xC	-
		0,080	2,00	0,035	0,020	0,80	19,0	11,0	-	0,70	0,30
12X18H10T		-	-	-	-	-	17,00	9,00	-	5xC	-
		0,120	2,00	0,035	0,020	0,80	19,00	11,00	-	0,80	0,30

 

Mechanical Performance of 12X18H10T 08X18H10T AISI 321 Stainless Steel Seamless Tube Pipe

			Elongation .(%) in 2" (min.)
	Tensile strength (min.)	Yield strength (min.)		HRB(max.)
AISI 321	515	205	35	90
AISI 321H	515	205	35	90
08X18H10T	549	216	37	-
12X18H10T	549	216	35	-

 

Staðlar og umburðarlyndi fyrir óaðfinnanlega rör úr ryðfríu stáli

Standard	Ytri þvermál vikmörk (mm)		Þykktarþol		Lengdarvikmörk (mm)
GOST 9941-2022	D<10	Venjulegt: ±0,30	T<0.3	Venjulegt: ±0,05 mm	+15/-0
				Hár: ±0,03 mm
		Hár: ±0,20	(0.3~0.4]	Venjulegur: ±0,07 mm
				Hár: ±0,05 mm
		Hærri:±0,15	(0.4~0.6]	Venjulegt: ±0,10 mm
				Hár: ±0,07 mm
	(10~30]	Venjulegt:±0,40	(0.6~1.0]	Venjulegt: ±0,15 mm
				Hár: ±0,10 mm
		Hár: ±0,30	(1~3] D/S <40	Venjulegt:+12.5%/-15%
				Hár: ±12,5%
		Hærri:±0,20		Hærra:+12.5%/-10%
			(1~3] D/S >40	Hærri: ±15%
	(30~95]	Venjulegt: ±1,2%		Venjulegt:+12.5%/-15%
		Hátt: ±1%	(3~7] D/S <40	Venjulegt: ±12,5%
		Hærra:±0,8%		Hátt:+12.5%/-10%
	D>95 D/S <40	Venjulegt: ±1,2%		Hærri: ±10%
		Hátt: ±1%	(3~7] D/S >40	Venjulegt:+12.5%/-15%
		Hærra:±0,8%		Hár: ±12,5%
	D>95 D/S >40	Venjulegt: ±1,5%	T>7 D<325	Venjulegt:+12.5%/-10%
		Hár: ±1,2%		Hár: ±10%
		Hærra: ±1,0%	T>7 D>325	Venjulegt:+12.5%/-15%

 

08X18H10T Ryðfrítt stálrör Umsóknir

Petrochemicals: Framleiðsla á hita-þolnum og tæringarþolnum-varmaskiptarörum og þrýstihylkjum.
Orka og kjarnorka: Notað fyrir ofhitunarrör, ketilsleiðslur og kælikerfi kjarnorkuvera.
Aerospace: Útblásturskerfi, dreifikerfi og eldsneytiskerfi.

Gæðaeftirlit

Til að uppfylla GOST 9941 staðalinn verða rörin að gangast undir eftirfarandi próf:
Efnasamsetning greining: Nánar tiltekið hlutföll kolefnis (C) og títan (Ti).
Millikorna tæringarpróf (IGC): Venjulega framkvæmt í samræmi við GOST 6032 staðalinn; þetta er mikilvægur gæðavísir.
Tog- og hörkupróf: Til að tryggja togstyrk og lengingu uppfylli kröfurnar.
Fletningar- og blossunarprófanir: Til að meta sveigjanleika rörsins og áreiðanleika soðnu svæða (þar sem við á).
Ó-eyðandi prófun: 100% úthljóðsprófun (UT) eða hringstraumsprófun (ET).

 

Umbúðir

Plastlokar: Plasthettur (venjulega bláar, rauðar eða gular) eru settar á báða enda hvers stálrörs.
Stálband: Há-stálbönd eru notuð til að binda saman, með að minnsta kosti 3–5 bindipunktum á hvern búnt. Hlífðarefni-eins og pappa, nælonpúðar eða gúmmíræmur-eru sett á milli ólanna og röranna til að koma í veg fyrir að böndin skemmi yfirborð pípunnar.
Umbúðir úr tréhylki (mælt með): Fyrir 08X18H10T rör með þunna veggi (WT < 2 mm) eða miklar -kröfur um nákvæmni, eru venjulega notaðar trékassar með fumigated tré (samræmast IPPC stöðlum) eða stál-grind. Þetta er besta aðferðin til að koma í veg fyrir aflögun vegna mulningar eða brots.
Ofinn pokapökkun: Fyrir staðlaðar upplýsingar er hægt að pakka öllu pípunni inn í þykknar, tvöfaldar-laga ofnar poka (með innri vatnsheldri filmu og ytra slitþolnu lagi).