Stainless Steel Grade 347: forms, specifications and uses
Stainless Steel Grade 347 (UNS S34700) is a stabilized austenitic stainless steel that is very similar to grade/alloy 304 with the inclusion of columbium and tantalum.
Titanium Industries offers Stainless Steel Grade 347 Round Bar and Stainless Steel Grade 347 Hex Bar from its locations.
Stainless Steel Grade 347 is supplied to specifications including AMS 5646, AMS-QQ-S-763, ASTM A276, ASTM A320 and ASTM A484.
Typical uses of Stainless Steel Grade 347 include jet and rocket engines, high temp expansion joints, exhaust manifolds, chemical production equipment, aircraft collector rings and valves.
For Stainless Steel Grade 347, request a quote online or contact your nearest Titanium Industries location. Alloy data on this page is for reference only, not for design.
Weight Calculator
Stainless Steel Grade 347 | UNS# S34700 is a stabilized austenitic stainless steel that is very similar to grade/alloy 304 with the inclusion of columbium and tantalum. To avoid chromium carbide precipitation, columbium is used to stabilize. Because of these attributes, type 347 is typically used for exhaust stacks in airplanes, jet engine parts, various expansion joints, fasteners, tubing, metal hosing, and similar applications. Grade 347 is also an ideal material for high temperature service due to its good mechanical properties and excellent resistance to intergranular corrosion when exposed to temperatures in the chromium carbide precipitation range of 800° to 1500°F.
Stainless Steel Grade 347 Specifications:
Stainless Steel Type 347 product forms offered at all Titanium Industries' locations:
- Stainless Steel Grade 347 Round Bar
- Stainless Steel Grade 347 Hex Bar
Stainless Steel Grade 347 Applications:
- Jet and Rocket Engines
- High Temp Expansion Joints
- Exhaust Manifolds
- Chemical Production Equipment
- Aircraft Collector Rings
- Valves
DISCLAIMER: Alloy data sheets are for reference only, not for design purposes.
| Chemical Composition | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Fe 68.0% | Cr 17.0% | Mn <=2.0% | C 0.080% | Si <=1.0% | |||||
| Ni 11.0% | S <=0.030% | Nb+Ta 0.80% | P <=0.045% | ||||||
| PHYSICAL PROPERTIES | ||||||
|---|---|---|---|---|---|---|
| Density | Electrical conductivity (% IACS) | Thermal conductivity (BTU-in/hr-ft²-°F) | Specific heat capacity | Thermal expansion (1/°F) | Melting Point (°F) | |
| 0.289 | 2.36 | 113 | 0.12 | 0.00000961 | 2600 | |
| Mechanical Properties | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Property | Minimum | Maximum | |||||||
| Yield Strength Range (Rp0.2 Offset) (ksi) | 30 | 65.3 | |||||||
| Tensile Strength Range (Rm) (ksi) | 75 | 100 | |||||||
| Elongation (AL=5 x Ø) | 40.0% | 45.0% | |||||||
| Brinell Hardness (H) | 187 | 230 | |||||||
| Modulus of Elasticity (ksi) (E): 28300 | |||||||||
| Machineability General Index: 36% | |||||||||
Stainless Steel Grade 347: questions and answers
What is Stainless Steel Grade 347?
What is Stainless Steel Grade 347?
Stainless Steel Grade 347 (UNS S34700) is a stabilized austenitic stainless steel that is very similar to grade/alloy 304 with the inclusion of columbium and tantalum.
Which Stainless Steel Grade 347 product forms does Titanium Industries stock?
Which Stainless Steel Grade 347 product forms does Titanium Industries stock?
Stainless Steel Grade 347 Round Bar and Stainless Steel Grade 347 Hex Bar.
Which specifications does Stainless Steel Grade 347 meet?
Which specifications does Stainless Steel Grade 347 meet?
AMS 5646, AMS-QQ-S-763, ASTM A276, ASTM A320 and ASTM A484.
What is Stainless Steel Grade 347 used for?
What is Stainless Steel Grade 347 used for?
Jet and rocket engines, high temp expansion joints, exhaust manifolds, chemical production equipment, aircraft collector rings and valves.