Overview
Alloy 347H (UNS S3409) stainless steel is the higher carbon (0.04 – 0.10) version of the alloy. It was developed for enhanced creep resistance and for higher strength at temperatures above 1000°F (537°C). In most instances, the carbon content of the plate enables dual certification.
SUS 347H Tubes is the higher carbon composition form of Alloy 347 and demonstrates improved high temperature and creep properties. This premium quality of AISI 347H Pipes is always recognized for their quite a lot of features such as reliable and durable finish, powerful construction, non-corrosive, and quite easy to install. Alloy 321H Pipes is also advantageous for high temperature service because of its good mechanical properties. Working temperatures of 2100 – 2250 Degree F (1149 – 1232 Degree C) is recommended in Type 347H Pipes for forging, upsetting and other hot working processes.
Specification
ASTM A213/A213M-21a Standard Specification for Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater, and Heat-Exchanger Tubes.
Specifications | ASTM A213 / ASME SA213 |
Dimensions | ASTM, ASME and API |
Range | 1/2"OD - 12"OD |
Outside Diameter | 3.00 mm - 219.10 mm, 6.35 mm O.D to 114.3 mm O.D |
Length | Single Random, Double Random & Required Length |
Thickness | 0.40 mm - 12.70 mm, 0.8 mm to12.7 mm |
Schedule | SCH20, SCH30, SCH40, STD, SCH80, XS, SCH60, SCH120, SCH140, SCH160, XXS |
Type | Seamless |
Form | Round Tube, Square Tube, Rectangular Tube |
End | Plain End, Beveled End, Treaded |
Equivalent Grades for Stainless Steel TP 347H Seamless Tubes:
STANDARD | WERKSTOFF NR. | UNS | JIS | GOST | EN |
SS 347H | 1.4961 | S34709 | SUS 347H | - | X6CrNiNb18-12 |
Chemical Composition
Grade | C | Mn | Si | P | S | Cr | Cb | Ni | Fe |
SS 347H | 0.04 – 0.10 | 2.0 max | 1.0 max | 0.045 max | 0.030 max | 17.00 - 19.00 | 8xC – 1.10 | 9.0 -13.0 | 63.72 min |
Mechanical Properties
Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
8.0 g/cm3 | 1454 °C (2650 °F) | Psi – 75000 , MPa – 515 | Psi – 30000 , MPa – 205 | 35 % |
SS 347H Tube ASTM A213 Tolerances
Specification | Allowable Outside Diameter Variation in mm | Allowable Wall Thickness Variation | Exact Length Tolerance in mm | Testing | ||||
Nominal Diameter | Over | Under | %Over | %Under | Over | Under | ||
ASTM-A213 TP347H | Under 25.4 | .1016 | .1016 | +20 | -0 | 3.175 | 0 | Flattening Test |
25.4-38.1 incl | .1524 | .1524 | +22 | -0 | 3.175 | 0 | Tension Test | |
38.1-50.8 excl | .2032 | .2032 | +22 | -0 | 3.176 | 0 | Flare Test | |
50.8-63.5 excl | .254 | .254 | +2 | -0 | 4.46 | 0 | Hardness Test | |
63.5-76.2 excl | .347H8 | .347H8 | +22 | -0 | 4.76 | 0 | 100% Hydrostatic test | |
76.2-101.6 incl | .381 | .381 | +22 | -0 | 4.76 | 0 | Refer to ASTM A-450 | |
Applications
1. Aerospace.
2. Laboratory benches & equipment.
3. Coastal architectural panelling, railings & trim.
4. Boat fittings.
5. Chemical Processing.
6. Heat Exchangers.
7. Woven or welded screens for mining, quarrying & water filtration.
8. Threaded fasteners.
9. Springs.
