12X18H9T tape, sheet, round, wire

Purpose — welded equipment, blades, seals and other parts of power engineering, pipes, furnace parts fittings, heat exchangers, muffles, the details of exhaust systems, sheet and grooved parts; machines and vessels operating at temperatures from -196 to 600 °C under pressure and in the presence of corrosive environments up to 350 °C. corrosion resistant Steel, heat-resistant, austenitic.

Delivery form austenitic stainless steel 12KH18N9T:

• stainless steel 12X18H9T
• stainless steel wire 12X18H9T
• tape stainless steel 12X18H9T
• range of stainless steel 12X18H9T
• sheet stainless steel 12X18H9T

Substitute — steel 10KH14G14N4T, 12H17G9AN4, 12X18H10T.

Delivery type — bars, including shapes: GOST 5949−75, GOST 2590−88, GOST 2591−88, GOST 2879−88. Rod calibrated GOST 7417−75, GOST 8559−75, GOST 8560−78. Brushed silver rod GOST 5949−75, GOST 14955−77, GOST 18907−73. A thick sheet of GOST 7350−77. Strip GOST 4405−75, GOST 103−76. Wire GOST 18143−72. Forgings and forged billets GOST 1133−71, GOST 25054−81.

Chemical composition, % (GOST 5632−72)

With	Si	Mn	Cr	Ni	Ti	S	P	Cu
No more						No more
0,12	0,8	2,0	17,0−19,0	8,0−9,5	5 *S-0,8	0,020	0,035	0,30

Technological properties

Forging temperature, °C: beginning of 1200, the end 850. Cross-section up to 350 mm cooled in air.

Weldability — welded without restriction. Welding methods: SMAW electrodes CL-11, CT-15 (providing corrosion resistance), DH-26 (used as heat-resistant no requirements ICC), ESW. Recommended subsequent heat treatment.

Machinability — K_{v TV. SPL} = 0.85 and K_{v b. St} = 0.35 in the quenched state in HB 169 and σ_in = 610 MPa.

Heat resistance

Environment	Temperature, °C	Depth, mm/year	Group resistance or score
Superheated steam	600	0,0018	2
The air	650	0,0022	2
The air	750	0,013	4

Corrosion resistance

A kind of corrosion	Environment	t ,°C	Duration, h	Points of resistance
Common	Water containing 5 mg/kg Cl-, 0,3−6,0 mg/kg O2	350	1000	1
	Sea water	20	3000	1
Point	Sea water	-	13000	3
Stress corrosion cracking	Water containing 200mg/kg Cl-, 0,3−6,0 mg/kg O2	350	Destruction by 500−700 hours	Tension above the yield limit
	42%MgCl2	154	The destruction of 2−5 hours	above the yield limit
Intergranular	Steel is not inclined to the ICC when tested according to GOST 6032−89 methods AM and AMU, after quenching and tempering at 650 °C for 1H.

Mechanical properties

Gets	Delivery condition	Cross-section, mm	σ0.2 MPa	σin MPa	δ5,%	ψ,%
			not less than
GOST 5949−75	Rod. Quenching with 1020−1100 °C in air, oil or water	60	196	540	40	55
GOST 18907−73	Polished rod treated to a given strength Rod full hard	1−30 To 5	_ -	540−880 935	20 —	_ -
GOST 7350−77	The sheet hot rolled and cold rolled; quenched from 1030−1080 °C in water or air	SV. 4	216	530	38	_
GOST 25054−81	Forging. Quenched from 1050−1100 °C in water or air	Up to 1000	216	510	35	40
GOST 18143−72	Wire: heat-treated nagarebana	1−6 —	— -	540−880 1080	20 —	— -

Mechanical properties when tested for long-term strength

tCOI°C	The creep strength, MPa	The rate of creep, %/h	tCOI°C	The long-term strength, MPa	τ, h
600	74−78	1/100000	550	186−235	10000
			600	132−167
			550	137−196	100000
			600	98−127