MATERIALS FERRITIC STEELS CHEMICAL REQUIREMENTS (%) MECHANICAL PROPERTIES Carbon Manganese Phos- phorous Sulphur Silicon Nickel Chromium Molyb- denum Tensile Strength N/mm2 Yield Strength N/mm2 Elongation 2” (50mm) Reduction of Area CAST CARBON STEEL ASTM A216, Grade WCB ­­­ Min - - - - - - - - 485 205 22% 35% Max 0.35 1.00 0.040 0.045 0.60 - - - 655 - - - FORGED CARBON STEEL ASTM A105 Min - 0.60 - - - - - - 485 250 22% 30% Max 0.35 1.05 0.040 0.05 0.35 - - - - - - - CAST CARBON STEEL FOR LOW TEMPERATURES ASTM A352, Grade LCB* Min - - - - - - - - 450 240 24% 35% Max 0.30 1.00 0.040 0.045 0.60 - - - 620 - - - CAST CARBON MOLY STEEL FOR LOW TEMPERATURES ASTM A352, Grade LC1* Min - 0.50 - - - - - 0.45 450 240 24% 35% Max 0.25 0.80 0.040 0.045 0.60 - - 0.65 620 - - - CAST 2-1/2% NICKEL STEEL FOR LOW TEMPERATURES ASTM A352, Grade LC2* Min - 0.50 - - - 2.0 - - 485 275 24% 35% Max 0.25 0.80 0.040 0.045 0.60 3.0 - - 655 - - - CAST 3-1/2% NICKEL STEEL FOR LOW TEMPERATURES ASTM A352, Grade LC3* Min - 0.50 - - - 3.0 - - 485 275 24% 35% Max 0.15 0.80 0.040 0.045 0.60 4.0 - - 655 - - - CAST CARBON MOLY STEEL ASTM A217, Grade WCI Min - - - - - - - 0.45 450 240 24% 35% Max 0.25 0.80 0.040 0.045 0.60 - - 0.65 620 - - - CAST 1-1/4% CR - 1/2% MO ALLOY STEEL ASTM A217, Grade WC6 Min - 0.50 - - - - 1.0 0.45 485 275 20% 35% Max 0.20 0.80 0.040 0.045 0.60 - 1.50 0.65 655 - - - CAST 2-1/4% CR - 1% MO ALLOY STEEL ASTM A217, Grade WC9 Min - 0.40 - - - - 2.0 0.9 485 275 20% 35% Max 0.18 0.70 0.040 0.045 0.60 - 2.75 1.20 655 - - - CAST 1 - 6% CR ALLOY STEEL ASTM A217, Grade C5 Min - 0.40 - - - - 4.0 0.45 620 415 18% 35% Max 0.20 0.70 0.040 0.045 0.75 - 6.50 0.65 795 - - - CAST 9% CR - 1% MO ALLOY STEEL ASTM A217, Grade C12 M in - 0.35 - - - - 8.0 0.9 620 415 18% 35% M ax 0.20 0.65 0.040 0.045 1.00 - 10.00 1.20 795 - - - CAST 12 - 14% CR ALLOY STEEL ASTM A217, Grade CA15 Min - - - - - - 11.5 - 620 450 18% 30% M ax 0.15 1.00 0.040 0.030 1.50 1.0 14.0 0.50 795 - - - FORGED/ROLLED 12 - 14% CR ALLOY STEEL ASTM A182, Grade F6a Min - - - - - - 11.5 - 760 585 15% 35% Max 0.15 1.00 0.040 0.030 1.00 0.50 13.5 - - - - - *Usual minimum service temperature : LCB at -46°C (-50°F), LCI at -60°C (-75°F), LC2 at -75°C (100°F), LC3 at -100°C (-150°F) AUSTENTIC STEELS CHEMICAL REQUIREMENTS (%) MECHANICAL PROPERTIES Carbon Manganese Phos- phorous Sulphur Silicon Nickel Chromium Molyb- denum Tensile Strength N/mm2 Yield Strength N/mm2 Elongation 2” (50mm) Reduction of Area CAST STAINLESS STEEL WITH MOLYBDENUM (LOW CARBON) ASTM A351, Grade CF3M Min - - - - - 9.0 17.0 2.0 485 205 30% - Max 0.03 1.50 0.040 0.040 1.50 13.0 21.0 3.0 - - - - CAST STAINLESS STEEL WITH MOLYBDENUM ASTM A351, Grade CF8M Min - - - - - 9.0 18.0 2.0 485 205 30% - Max 0.08 1.50 0.040 0.040 1.50 12.0 21.0 3.0 - - - - CAST STAINLESS STEEL WITH COLUMBIUM (NIOBIUM) ASTM A351, Grade CF8C Min - - - - - 9.0 18.0 - 485 205 30% - Max 0.08 1.50 0.040 0.040 2.00 12.0 21.0 0.50 - - - - ASTM A351-CF8C shall have a columbium content of not less than 8 times the carbon content but not over 1.00% PART NUMBER SYSTEM PAGE 4 *For API600 weights see page 41, 42. For Buttweld dimensions and weights see overview brochure. For RTJ dimensions see overview brochure. For 16” to 30” see overview brochure. STEAMCO - Cast Steel Steam Valves 6 PHYSICAL & CHEMICAL PROPERTIES PHYSICAL & CHEMICAL PROPERTIES