ASTM A213/312/249/269/GOST 9940seamless Stainless Steel Pipe and Tube

• Customization: Available
• Type: Stainless Steel Pipes
• Standard: ASTM
• Model NO.: ASTM A213/312/249/269/GOST 9940 PIPE
• Certification: ISO, AISI, ASTM, GB, EN, DIN
• Shape: Round
• Technique: Cold Rolled
• Surface Treatment: Pickling and Annealing
• Transport Package: Plywood Case, Knitting Strips
• Specification: OD: 1/2"--40", WT: 10S--XXS
• Origin: China
• HS Code: 7304419000
• Production Capacity: 15000tons/Year

Product Description

Chemical Composition

Grade	C	Mn	Si	P	S	Cr	Mo
321	≤0.08	≤2.0	≤0.75	≤0.045	≤0.03	17.0-19.0	-
321H	0.04-1.0	≤2.0	≤0.75	≤0.08	≤0.03	17.0-19.0	-

Mechanical Properties

Grade	Tensile Strength ksi(MPa)	Yield Strength ksi(MPa)	Elongation (% in 50mm)	Hardness
				Rockwell	Brinell (HB)
321	≥75(515)	≥30(205)	≥35	≤90HRB	≤192HBW
321H	≥75(515)	≥30(205)	≥35	≤90HRB	≤192HBW

Grade Specification Comparison

Grade	UNS No	EN		Gb	JIS
		No	Name
321	S32100	1.4541	X6CrNiTi18-10	0Cr18Ni11Ti	SUS 321
321H	S32109	1.4878	X10CrNiTi18-10	1Cr18Ni9Ti	SUS 321H

Heat Resistance

Good oxidation resistance in intermittent service to 900°C and in continuous service to 925°C. These grades perform well in the 425-900°C range, and particularly where subsequent aqueous corrosive conditions are present. 321H has higher hot strength, and is particularly suitable for high temperature structural applications.

Applications

 

• Typical applications include:
• Aircraft exhaust manifolds
• Expansion joints
• Bellows
• Furnace parts
• Heating element tubing
• Heat Exchangers
• Woven or welded screens for high temperature mineral processing
• Spiral Welded tube for burner pipes and flues

 

Material Summary

Grade 321 is the grade of choice for applications in the temperature range of up to about 900°C, combining high strength, resistance to scaling and phase stability with resistance to subsequent aqueous corrosion.

Grade 321H is a modification of 321 with a higher carbon content, to provide improved high temperature strength.

Like other austenitic grades, 321 have excellent forming and welding characteristics, are readily brake or roll formed and have outstanding welding characteristics. Post-weld annealing is not required. They also have excellent toughness, even down to cryogenic temperatures. Grade 321 does not polish well, so is not recommended for decorative applications.

Grade 304L is more readily available in most product forms, and so is generally used in preference to 321 if the requirement is simply for resistance to intergranular corrosion after welding. However 304L has lower hot strength than 321 and so is not the best choice if the requirement is resistance to an operating environment over about 500°C.

Are you a factory or a trading company?

We are a company with two mill and one warehouse,produce Stainless Steel/(Super)Duplex Steel/ Nickel Alloy seamless tube&pipes.
But we also can provide welded stainless steel pipes and pipe fittings, coils, sheets, bar, plates etc. if you need. Because we know this market well

Do you have any certificate?

We have approvals of ISO9001:2015,ISO14001:2015,ISO45001:2018, BV Ocean& Offshore Ship Classification Societies, GOST, TUV, PED AD2000 etc.
And will get ABS/NORSOK/DNV/CU-TR(EAC) soon.

What is your delivery time?

It mainly depends on your demanded volume and material grade. The time of delivery is usually around0.5- 1 month(1*40HT as usual).
We can send it out in 5 days if it has stock.

What is your payment terms?

Our usual payment term is 30% deposit and the rest against B/L. L/C is also acceptable. And the shipping terms are EXW,FOB, CFR,CIF.Whichever you like.

How can you guarantee the quality of my goods?

All material are 100% PMI tested and measured before shipping. We also accept third part inspection andEN10204.3.1B Mill test certificate for all materials.

How do you make our business long-term and good relationship?

1.We keep good quality and competitive price to ensure our customers benefit.
2. We respect every customer and we sincerely do business with them, sustain our service level before and after every deal.