Weldable Cast Carbon Steel

Aditya Technocast Pvt Ltd produce castings of carbon steel of three grade named WCA, WCB and WCC, composition and strength requirements of which is mentioned in Table 1.

WCB (UNS Code J03002) is covered by ASTM A216 standard, which specification covers carbon steel castings for valves, fittings, flanges and other pressure-containing parts for high temperature service and the quality required for assembly with other castings or wrought steel parts by fusion welding. These grades are all “cast” grades meaning they are made through “casting” which is a manufacturing process where a liquid material is poured into a mold and allowed to harden. 

The basic meaning of its grade is: W represents welding, C represents casting, A, B, and C represent the strength grades of carbon cast steel, where A is lower strength and B is Medium intensity, C for higher intensity.

WCA: Weldable Cast A grade carbon steel

WCB : Weldable Cast B grade carbon steel

WCC : Weldable Cast C grade carbon steel

Table 1: Chemical and Strength Requirements

As per ASTM A216/ A 216M standard, the carbon steel called as WCA, WCB & WCC grade if it shall conform to the requirements as to chemical composition prescribed in Table 1

Carbon Steel Grade WCA WCB WCC
UNS Designation S30400 S30403 S30409
ElementSymbol Min (%)Max (%) Min (%)Max (%) Min (%)Max (%)
CarbonC00.2500.3000.25
ManganeseMn00.7001.001.20
SiliconSi00.6000.6000.60
SulfurS00.04500.04500.045
PhosphorusP00.04000.04000.040
ChromiumCr00.5000.5000.50
NickelNi00.5000.5000.50
MolybdenumMo00.2000.2000.20
Tensile Strength (MPa) 415585 485655 485655
Yield Strength (MPa) (min) 205 250 275
Elongation (%) (min) 24 22 22
Reduction Area (%) (min) 35 35 35