Type 347

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SPECIFICATION DATA SHEET: 347 Stainless Steel

BAR	TUBE	PIPE
PSQ SHAFT	WELDING ROD	CASTINGS
FORGINGS	PLATE	FLANGES
TG&P SHAFTS	SHEET	FITTINGS

Stainless Steel 347

Specifications

The following specifications cover Stainless Steel 347

AISI 347
AMS 5512
AMS 5556
AMS 5558 (Round Tube- Welded)
AMS 5571 (Round Tube- Seamless)
AMS 5575 (Round Tube- Welded)
AMS 5646
AMS 5654
AMS 5674
ASTM A167
ASTM A182 (Forging - Open Die)
ASTM A193 (347, B8CA)
ASTM A194 (347, B8CA) (Nuts)
ASTM A213
ASTM A240
ASTM A249
ASTM A269
ASTM A271 (Round Tube- Seamless)
ASTM A276
ASTM A312
ASTM A314
ASTM A320 (347, B8CA)
ASTM A336 (Forging - Open Die)
ASTM A358 (Pipe- Welded)
ASTM A376 (Pipe- Seamless)
ASTM A403
ASTM A409 (Pipe- Welded)
ASTM A430
ASTM A473 (Forging - Open Die)
ASTM A479
ASTM A511
ASTM A554
ASTM A580
ASTM A632
ASTM A774
ASTM A778 (Round Tube- Welded)
ASTM A813 (Pipe- Welded)
ASTM A814 (Pipe- Welded)
DIN 1.4550
MIL A-23196
MIL S-23195
MIL S-23196
MIL T-6737 (Round Tube- Welded)
QQ S763
QQ S766
UNS S34700

Related Metals:

8R40 (tm)
Project 70 347 (tm)

Chemistry Data :

Carbon	0.08 max
Chromium	17 - 19
Iron	Balance
Manganese	2 max
Nickel	9 - 13
Niobium	Min:5 x C
Phosphorus	0.045 max
Silicon	1 max
Sulphur	0.03 max

Principal Design Features Similar to 321 stainless, 347 uses columbium as a stabilizing element to maximize its principal feature: resistance to intergranular corrosion. It can be used in applications requiring repeated heating in the range of 800 and 1650 F (427-899 C).

Applications High temperature gaskets and expansion joints, rocket engine parts, aircraft collector rings and exhaust manifolds and chemical production equipment.

Machinability Slightly tougher than 304 stainless, this material will produce the same tough stringy chips. The use of slow speeds and constant positive feeds will minimize this alloy's tendency to work harden.

Welding 347 may be welded by all commonly used fusion and resistance methods. Oxyacetylene welding is not recommended. When necessary, use AWS E/ER347 filler metal.

Hot Working Working temperatures of 2100-2250 F (1149-1232 C) are recommended for forging, upsetting and other hot work processes. Do not work this alloy at temperatures below 1700 F ( 927 C). Material must be water quenched or fully annealed after working to reattain maximum corrosion resistance.

Cold Working Although this material requires higher initial forces than 304 stainless, it is quite tough and ductile and can be readily stamped, blanked, spun and drawn.

Annealing 1850-2000 F (1010-1093 C), water quench. This procedure will result in maximum ductility. For maximum corrosion resistance, see the note on stabilizing anneal under corrosion.

Hardening This alloy does not harden by heat treating. Elevated properties may only be obtained through cold reduction.

Physical Data :

Density (lb / cu. in.) 0.29

Specific Gravity 8.03

Specific Heat (Btu/lb/Deg F - [32-212 Deg F]) 0.12

Electrical Resistivity (microhm-cm (at 68 Deg F)) 438

Melting Point (Deg F) 2600

Modulus of Elasticity Tension 28

Mechanical Data :

There is no Mechnical data available for this grade