Stainless 347 Product Guide

Applications | Specifications | Mechanical and Chemical Data | Tolerances

Overview

The biggest advantage of 347 stainless steel is that it maintains its strength and corrosion resistance even over the course of repeated heating and cooling. 347 is an austenitic stainless and also can operate at high temperatures without losing strength. Typically used in aircraft exhaust, boiler casings, heaters, furnace heating elements, welding equipment.

Common Trade Names

UNS S34700, AISI 347, Alloy 347, Type 347, austenitic stainless steel

Other Resources

Safety Data Sheet | Weight Calculator | Mill Test Reports

Products

Purchase Hex Bar 347 | Round Bar 347 | Sheet/Plate 347

Applications

Aircraft Engines/Exhaust
Boiler Casings
Thermal Equipment
Heaters
Furnace Heating Elements
Welding Equipment

Stainless 347 Specifications

ASTM	AMS	ASME
A193	5512	SA-269
A269	5646	SA-276
A276	5646


Physical Properties 347
Density	0.289 lb/in3
Ultimate Tensile Strength	92.8 ksi
Yield Tensile Strength	38.9 ksi
Shear Modulus	11,200 ksi
Shear Strength	64.5 ksi
Fatigue Strength	36 ksi
Hardness Rockwell \| Brinell	B85 \| 167
Elongation at Break Percentage	45%
Reduction of Area	50%
Modulus of Elasticity	28,300 ksi
Poisson's Ratio	0.27
Machinability Percentage	36%
Melting Point	2,550-2,600 °F
Specific Heat	1.1 x 10^-1 BTU/lb-°F
Thermal Conductivity	113 BTU-in/hr-ft^2-°F
Electrical Conductivity	2.4% IACS

Chemistry Information
Element	Percentage
Mn	2 max
C	0.08 max
P	0.045 max
S	0.03 max
Si	0.75 max
Cr	17 - 19
Ni	9 - 13
Nb + Ta	1 max

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