What is U Bend Ferritic Steel Tube ASTM A268 TP405?

Ferritic Steel TP 405 is a low carbon, 12% chrome steel, not subject to appreciable hardening through air cooling from high temperatures. This tendency retards the formation of hardening cracks caused by welding. Practically the same corrosion and oxidation resistance as TP410. Can be machined, drawn, spun and formed without difficulty. Used for applications where hardening upon cooling from high temperatures must be avoided. Has excellent long-time stability up to 1200°F.

U Bend Ferritic Steel Tube ASTM A268 TP405 Chemical composition  mass in %

Material grade	Norm	C	Si	Mn	P	S	Cr	Ni	Mo	Ti	others
		max.	max.	max.	max.	max.
1.4002	EN 10297-2	0,080	1,00	1,00	0,040	0,030	12,00 - 14,00				Al 0,1 – 0,3
TP405	ASME SA / ASTM A 268	0,080	1,00	1,00	0,040	0,030	11,50 - 14,50	0,50			Al 0,1 – 0,3

U Bend Ferritic Steel Tube ASTM A268 TP405 Mechanical properties and heat treatment

Material grade	Norm	Rp 0,2 MPa	Rp 1,0 MPa	Rm MPa	A	Hardness	Heat treatment
		min.	min.	min. max.	min.%	HRB max.
1.4002	EN 10297-2	210	220	400	10		annealed
TP405	ASME SA 268/ ASTM A268	205		415	20	95	annealed

Rp 0,2 = Rotation Rp 1,0 = Yield Strength Rm = Tensile Strength A = Elongation

U Bend Ferritic Steel Tube ASTM A268 TP405 Tolerances

OD - Tube	OD	WT	special WT	ID
ab Ø4,55 mm	±0,050 mm	±0,150 mm	±0,100 mm	X
ab Ø9,53 mm	±0,050 mm	±0,100 mm	±0,080 mm	±0,050 mm
ab Ø30,00 mm	±0,100 mm	±0,150 mm		±0,050 mm

U-Bend Tube are widely used in Heat Exchanger Systems. Heat-Exchanger Equipment on the basis of Seamless Ferritic  U-Tubes and Welded Ferritic  U bend Tube is essential in strategically important and critical felds---Nuclear And Petrochemical Machine Building.

ASTM A268 ASME SA268 S40500 405 Ferritic Steel 1.4002 is a 12% chromium steel, designed to be used in the as welded condition.  Unlike other grades in the 12% chromium category, 405 is not susceptible to extensive hardening through air cooling from high temperature. Commonly used for annealing boxes, steam nozzles, quenching racks, partitions and other fabrications that cannot be annealed after welded.

U Bend Ferritic Steel Tube ASTM A268 TP405 is soft and ductile, TP405 can be easily machined using most standard practices. Experienced machinists comment that 405 machines similarly to 4130 alloy steel. 405 can be easily spun, drawn and formed using common forming procedures.

U Bend Ferritic Steel Tube ASTM A268 TP405 can be welded using shielded fusion and resistance techniques. Oxyacetylene welding is not recommended. Use 405 Cb electrodes that contain columbium rather than aluminum to control hardening. Post weld annealing will maximize ductility. Soak at 1500-1600 F(817-871 C) and then quickly increase to 1900-2050 F(1038-1121 C). Do not remain at this temperature as the result will be excessive grain growth. Do not work below 1500 F(816C). After forging, air cool and anneal.

U Bend Ferritic Steel Tube ASTM A268 TP405 AISI Type 405 1.4002 Stainles Steel has marginal Ferritic  steel corrosion resistance. It is used primarily as a structural material. It is serviceable in continuous service up to 1300 F and in intermittent exposures up to 1500 F. It does not harden appreciably when air cooled from high temperature where some austenite may exist.

U Bend Ferritic Steel Tube ASTM A268 TP405 is a 12% chromium steel designed to be used in the as-welded condition. Unlike other 12% chromium steels, it is not subject to a great deal of hardening through air cooling form high temperatures.

405 Ferritic  Steel Specification:

ASTM A240 Standard Specification for Chromium and Chromium-Nickel Ferritic  Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications

ASTM A268 Standard Specification for Seamless and Welded Ferritic and Martensitic Ferritic  Steel Tubing for General Service

EN 10088-2 Ferritic  steels – Part 2: Technical delivery conditions for sheet/plate and strip of corrosion resisting steels for general purposes

JIS G3463 Ferritic  Steel for Boiler and Heat Exchanger Tubes

  U Bend Ferritic Steel Tube ASTM A268 TP405