Forged Valve Body

AISI 4130 Forged Bodies for wellhead equipments

Material Type: Low alloy steel AISI 4130
RAW MATERIAL: Forging, bar stock on mechanical tubing
Service: Ydrogen sulfide (H2S)
MATERIAL PROPERTY DESIGNATION: 75K

ALLOWABLE MELTING PRACTCE:
Material produced to this specification shall be made to fine grain practice using one opf the following melting practice:
- Basic oxygen process (BOP).
- Electric furnace with vacuum degassing of vacuum processing.
- Electric furnace with argon stirred degassing.
- Electric furnace followed by Argon Oxygen Decarburization (AOD).
- Electric furnace followed by either electro slag remelting (ESR) OR VACUUM ARC REMELTING (VAR).
- Vacuum induction melting.
- Electric furnace or induction melting following by a ladle refining process.

HOT WORKING PRACTICES:
Ali wrought materials shall be of pressure vessel quality and shall be formed using a hot working practice which produces a wrought structure. For material produced as a forging, the minimum acceptable total hot work ratio, relative to ingot size, shall be 3: 1.

Mechanical properties requirements:
- Tensile strength, Min. 95, 000 PSI
- Yield strength, Min. 75, 000 PSI
- Elongation in 2", min. 18%
- Reduction in Area, min. 35%
- Surface Hardness 197-235 HB.

COMPOSITION	C	Mn	P	S	Si	Cr	Mo	Ni	V
LIMITS	0.27-0.35	0.4-0.8	0.025-max	0.025-max	0.15-0.45	0.8-1.3	0.15-0.35	0.5- max	0.3 max