TP430 SS Automotive Stainless Steel Tubing ASTM A268 For Boiler / Heat Exchanger

Type 430 stainless is one of the most widely used of non hardenable ferritic stainless steels, with nominal 16% chromium it combines good corrosion resistance and heat and oxidation resistance up to 816℃ with good mechanical properties.

Applications

home electrical appliances

cutlery

household

indoor decoration

oil refinery equipment

TP409 is a typical martensitic chromium-alloy steel grade. It does not have the nickel content and owns the following characteristic:
 

Typical applications for 430 grade include:

• Linings for dish washers
• Refrigerator cabinet panels
• Automotive trim
• Lashing Wire
• Element Supports
• Stove trim rings
• Fasteners
• Chimney Liners

Heat Treatment

• Solution Annealing – Heat to 815-845°C, hold for ½ hour per 25mm of thickness, slow furnace cool to 600°C and then quickly air cool. Slow cooling from 540-400°C will cause embrittlement.
• Sub-Critical anneal – Heat to 760-815°C and then air cool or water quench.
• This grade is not hardenable by thermal treatment.

Welding

• Pre-heat at 150-200°C if welding is necessary.
• Embrittlement in the weld metal and heat affected zone can be relieved by a post-weld anneal at 790-815°C
• Grain refinement will not occur.

Machining

• Easier to machine than the standard austenitic grades such as 304.
• Still a tendency for galling and pick-up on the cutting tool.
• Bars that have been lightly drawn are easier to machine than those in the annealed condition.
• Grade 430F, the free machining version of 430, is very much easier to machine.

Fabrication

• Lower work hardening rate makes bending and forming somewhat easier than for grade 304
• Lower ductility restricts very severe operations.
• Severe bends should be made with the bend axis at right angles to the rolling direction.
• Severe cold heading of 430 wire is possible.

Item Code:	TP409
Tube OD.:	1/4'' - 2''
Wall:	0.028'' - 0.120''
Length:	20FT
Material:	405
Standard:	ASTM A268 ASME SA268
Finish:	Annealed & Pickled.
Type:	Seamless Cold Drawn
Certification:	ISO9001:2015
Mill Test Certificate:	EN10204 3.1
Packing:	Sleeved, Wooden Boxed

5% Test Solution at 120°F (49°C)		Corrosion Rate in Mils per Year and Millimeters per Year (mm/a)
		Alloy 409	Alloy 410S	Alloy 420	Alloy 425 Mod	Alloy 440A	Alloy 430
Acetic Acid		0.88 (0.022)	0.079 (0.002)	1.11 (0.028)	4.79 (0.122)	2.31 (0.0586)	0.025 (0.0006)
Phosphoric Acid		0.59 (0.002)	0.062 (0.002)	0.068 (0.002)	0.593 (0.015)	0.350 (0.009)	0.029 (0.001)