A358 TP321 Grade 1 Stainless Steel Electric Fusion Welded Pipe

GNEE is a leading supplier, distributor, and manufacturer of ASTM A358 Grade 321 EFW (Electric Fusion Welded) pipes. We provide ASME SA358 TP 321 stainless steel EFW pipes suitable for industrial applications such as aircraft exhaust manifolds, furnace components, and heat exchangers.

 

For high-temperature and corrosive applications, ASTM A358 TP321 Grade 1 EFW pipes are an excellent choice due to their titanium stabilizer, which prevents intergranular corrosion. If you prioritize a more cost-effective option and do not require full radiographic inspection, ASTM A358 Grade 3 (single-weld) or Grade 5 (spot radiography) pipes may be more suitable. These grades are also produced with filler metal but have less stringent inspection requirements.

 

We can provide ASTM A358 Grade 321 welded pipes with customized dimensions and specifications based on customer requirements, in accordance with ASTM, ASME, and other equivalent standards.Email: info@gneestainless.com

 

ASTM A358 Stainless Steel 321 EFW Pipe Specification

Specification	ASTM A358 / ASME SA358
Specification	A / SA358 CLASS 1, A / SA358 CLASS 2, A / SA358 CLASS 3, A / SA358 CLASS 4, A / SA358 CLASS 5
Grades	304, 304L, 304H, 309S, 310S, 316, 316L, 316H, 317L, 321, 321H, 347, 347H, 904L ETC.
Type	EFW, ELECTRIC FUSION WELDED
Outer Diameter Size	Electric Fusion Welded / ERW- 8" NB To 110" NB (Nominal Bore Size)
Wall Thickness	Schedule 10 To Schedule 160 (3 mm to 100 mm Thickness)
Length	01 Meter to 12.5 Meters, Single Random Length, Double Random Length And Customize Size.
Ends	Plain Ends / Beveled Ends
Delivery Conditions	As Rolled, Formed, Stress Relieved, Annealed, Hardened, Tempered

If you want to know more details and prices of the products, please contact us in time!Email: info@gneestainless.com

 

Chemical Composition of SS321/321H/347

Grade		C	Mn	Si	P	S	Cr	Mo	Ni	N	Other
321	min. max	- 0.08	2.00	0.75	0.045	0.030	17.0 19.0	-	9.0 12.0	0.10	Ti=5(C+N) 0.70
321H	min. max	0.04 0.10	2.00	0.75	0.045	0.030	17.0 19.0	-	9.0 12.0	-	Ti=4(C+N) 0.70
347	min. max	0.08	2.00	0.75	0.045	0.030	17.0 19.0	-	9.0 13.0	-	Nb=10(C+N) 1.0

 

Mechanical properties

Grade	Tensile Strength (MPa) min	Yield Strength 0.2% Proof (MPa) min	Elongation (% in 50mm) min	Hardness
				Rockwell B (HR B) max	Brinell (HB) max
321	515	205	40	95	217
321H	515	205	40	95	217
347	515	205	40	92	201
321H also has a requirement for a grain size of ASTM No 7 or coarser.

 

Physical properties

Grade	Density (kg/m3)	Elastic Modulus (GPa)	Mean Coefficient of Thermal Expansion (m/m/0C)			Thermal Conductivity (W/m.K)		Specific Heat 0-1000C (J/kg.K)	Electrical Resistivity (n.m)
			0-1000C	0-3150C	0-5380C	at 1000C	at 5000C
321	8027	193	16.6	17.2	18.6	16.1	22.2	500	720

 

Grade specifications for SS321/321H/347

Grade	UNS No	Old British		Euronorm		Swedish SS	Japanese JIS
		BS	En	No	Name
321	S32100	321S31	58B, 58C	1.4541	X6CrNiTi18-10	2337	SUS 321
321H	S32109	321S51	-	1.4878	X10CrNiTi18-10	-	SUS 321H

 

ASTM A358 Grade 321 EFW Pipe Quality Control
ASTM A358 Grade 321 EFW arge-diameter stainless steel pipes are produced under strict quality control procedures. Each pipe undergoes dimensional inspection, surface defect detection, PMI (Positive Material Identification), ultrasonic or eddy current testing, and hydrostatic pressure testing to ensure compliance with ASTM A358 standards. Only pipes that meet international quality standards are securely packaged for shipping, ensuring stable performance, corrosion resistance, and long service life. 

 

All ASTM A358 Grade 321 EFW round pipes are securely packaged in moisture-proof wooden crates or pallets to ensure safe transportation and maintain product quality.