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astm a178 tubing is carbon steel and carbon manganese erw tubing used in boilers, boiler flues, super heaters. astm a178 is available in a178 grade a (low carbon steel), a178 grade c (medium carbon steel), and a178 grade d (carbon manganese steel).
specifications : astm a178 / asme sa178
welded boiler tube size: 12.7mm to 127mm
wall thickness : 1.5mm to 6.0mm
type: welded, erw
end connections : plain end, beveled end, threaded
length : single random, double random & required length, custom size – 12m lengths
astm a178 chemical composition | |||||
grade | carbon | manganese | phosphorus | sulfur | silicon |
astm a178 gr a | 0.06% - 0.18% | 0.27% - 0.63% | 0.035% max | 0.035% max | - |
astm a178 gr c | 0.35% max | 0.80% max | 0.035% max | 0.035% max | - |
astm a178 gr d | 0.27% max | 1.00% - 1.50% | 0.30% max | 0.015% max | 0.10% min |
mechanical properties of asme sa 178 welded boiler tubing
grade | p # | tensile strength | yield | max hardness |
astm a178 gr a / sa178a | p 1 | ksi: 47 mpa: 325 | ksi: 26 mpa: 180 | 77 hrb (rockwell b) |
astm a178 gr c / sa178c | p 1 | ksi: 60 mpa: 415 | ksi: 37 mpa: 255 | 79 hrb (rockwell b) |
astm a178 gr d / sa178d | p 1 | ksi: 70 mpa: 485 | ksi: 40 mpa: 275 | 77 hrb (rockwell b) |
astm | uns no. | korea/japanes | german | british | |||||||
ks/jis symbol | ks/jis | re | din type | din | no. | re | b.s | b.s grade | |||
a 178 c-steel electric-resistance welded boiler tubes | |||||||||||
grade a | k01200 | stbh 340 / stb 35 | d3563 / g3461 | st 37.8 | 17177 | 1.0315 | (7) | 3059 | erw 320 | ||
grade c | k03503 | shbh 410 / stb 42 | d3563 / g3461 | st 42.8 |
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