Skytech Rolling is a known manufacturer, distributor and trader of SS 347 / 347H Square Bars, which is stabilized against chromium carbide formation by the addition of titanium. SS 347 Square Bars has good oxidation resistance, on par with most other austenitic stainless steels. These Stainless Steel 347H Square Bars has excellent resistance to inter-granular corrosion after exposure to temperatures in the chromium carbide precipitation range of 800 Degree F – 1500 Degree F. SS 347 Square Bars is a columbium (niobium)/tantalum stabilized austenitic chromium-nickel stainless steel which was developed to provide an 18-8 type alloy with improved inter-granular-corrosion resistance. Since these elements in SS 347H Square Bars have a stronger affinity for carbon than chromium, columbium-tantalum carbides precipitate within the grains instead of forming at the grain boundaries.
Alloy 347 Square Bars is stabilized by the additions of chromium and tantalum and offers higher creep and stress rupture properties than Alloy 304 Square Bars and Alloy 304L Square Bars which may also be used for exposures where sensitization and inter-granular corrosion are of concern. Slightly tougher than SS 304 Bars, these Alloy 347H Square Bars will produce the same tough stringy chips. 347 Stainless SS Square Bars is often used for High temperature gaskets, Expansion joints, Rocket engine parts, Aircraft collector rings, and more. The columbium serves to produce a stabilized type of 347H Stainless SS Square Bars which is immune to chromium carbide precipitation.
Dimensions : ASTM, ASME
Standard : ASTM / ASME SA A582, A276, A564, ASTM A484, 484M
Surface : hrap, hot rolled pickled or sand blasting finished, cold drawn, polished, hairline
Size : Tolerance: H8, H9, H10, H11, H12, H13K9, K10, K11, K12
STANDARD | WERKSTOFF NR. | UNS |
SS 347 | 1.4961 | S34700 |
SS 347H | 1.4550 | S34709 |
Element | C | Cr | Mn | Ni | P | S | Si |
SS 347 | 0.08 max. | 17.0 – 19.0 | 2.00 max. | 9.0-13.0 | 0.045 max. | 0.03 max. | 0.75 max. |
SS 347H | 0.04 – 0.10 | 17.0 – 19.0 | 2.00 max. | 9.0-12.0 | 0.045 max. | 0.03 max. | 0.75 max. |
Element | Density | Melting Range,℃ | Tensile Strength | Yield Strength | Elongation | Hardness (Brinell) |
SS 347/347H | 7.96 | 1450 ℃ | 515 | 205 | 40 | 201 |
SQUARES | ||
---|---|---|
Size(mm) | WT PER FEET IN KGS | WT PER MTR IN KGS |
16 | 0.62 | 2.05 |
18 | 0.79 | 2.59 |
20 | 0.76 | 2.49 |
22 | 1.18 | 3.87 |
25 | 1.52 | 5.00 |
28 | 1.91 | 6.27 |
30 | 2.19 | 7.20 |
32 | 2.50 | 8.19 |
36 | 3.16 | 10.37 |
38 | 3.52 | 11.55 |
40 | 3.90 | 12.80 |
45 | 4.94 | 16.20 |
50 | 6.10 | 20.00 |
56 | 7.65 | 25.08 |
60 | - | - |
65 | - | - |
70 | - | - |
75 | - | - |
80 | - | - |
90 | - | - |
100 | - | - |
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