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BAHUBALI METALS INDIA is one of the prominent exporter of ASTM A312 Stainless Steel 309H (UNS S30909) Seamless & Welded Pipes & Tubes. Stainless Steel 309 is an austentic steel involving high nickel and chromium content. These components empower this high steel combination evaluation to be used in sulfur containing climates. The high steel combination is produced to be utilized as a part of high temperature erosion resistance and oxidation under non cyclic conditions. It can like wise be used in somewhat nitriding, warm, oxidizing and solidifying cyclic applications.

Stainless Steel 309S is a low carbon rendition of SS 309. It is used for quietness of creation. Stainless Steel 309H is a high carbon rendition of 309, which is created for improved downer resistance.


Grade 309H C Mn Si P S Cr Mo Ni N
min. 0.04 - - - - 22.0 - 12.0 58.1
max. 0.10 2.0 0.75 0.045 0.030 24.0 - 15.0 66.0
Grade Tensile Strength (MPa) min Yield Strength 0.2% Proof (MPa) min Elongation (% in 50mm) min Hardness
Rockwell B (HR B) max Brinell (HB) max
309H 580 230 35 90 198
309H also has a requirement for a grain size of ASTM No 7 or coarser.
Density (kg/m3) Elastic Modulus (GPa) Mean Coefficient of Thermal Expansion (m/m/0C) Thermal Conductivity (W/m.K) Specific Heat 0-1000C (J/kg.K) Electrical Resistivity (n.m)
0-1000C 0-3150C 0-5380C at 1000C at 5000C
7.73 220 11.5 17.8 18.4 16.2 21.5 450 570
Grade UNS No Old British Euronorm Swedish SS Japanese JIS
BS En No Name
309H S30900/S30908 SA240 - 1.4343A - - -
These comparisons are approximate only. The list is intended as a comparison of functionally similar materials not as a schedule of contractual equivalents. If exact equivalents are needed original specifications must be consulted.


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