Piping Material Grade Specifications & Metallurgy
Comprehensive technical data sheets detailing chemical composition, PREN ratings, Qatar environmental performance, and welding guidelines.
Stainless Steel 304 (UNS S30400)
Stainless Steel 304 is the most widely utilized austenitic stainless steel globally, composed of approximately 18% chromium and 8% nickel. It offers g...
View Full Metallurgy Guide →Stainless Steel 304L (UNS S30403)
SS 304L is the low-carbon modification of SS 304 with carbon restricted to maximum 0.030%. This low carbon content prevents the precipitation of chrom...
View Full Metallurgy Guide →Stainless Steel 316 (UNS S31600)
Stainless Steel 316 is the benchmark corrosion-resistant alloy across Qatar’s coastal and process industries. The addition of 2.0% to 3.0% molybdenum ...
View Full Metallurgy Guide →Stainless Steel 316L (UNS S31603)
SS 316L combines the chloride pitting resistance of molybdenum with a low carbon maximum (0.030%) to eliminate carbide precipitation during welding. I...
View Full Metallurgy Guide →Stainless Steel 321 (UNS S32100)
SS 321 is an austenitic chromium-nickel steel stabilized with titanium (minimum 5x carbon content). Titanium has a stronger chemical affinity for carb...
View Full Metallurgy Guide →Stainless Steel 347 (UNS S34700)
SS 347 is stabilized by additions of niobium (columbium) and tantalum. Niobium forms stable niobium carbides, preventing chromium depletion in severe ...
View Full Metallurgy Guide →Stainless Steel 904L (UNS N08904)
SS 904L is a high-alloy super-austenitic stainless steel engineered with 25% nickel, 4.5% molybdenum, and 1.5% copper. The copper addition imparts uni...
View Full Metallurgy Guide →Duplex 2205 (UNS S31803 / S32205)
Duplex 2205 features a balanced 50/50 dual-phase microstructure of austenite and ferrite. It provides roughly twice the mechanical yield strength of s...
View Full Metallurgy Guide →Super Duplex 2507 (UNS S32750)
Super Duplex 2507 is an ultra-high performance alloy engineered for exceptionally aggressive chloride and acidic environments. With a Pitting Resistan...
View Full Metallurgy Guide →ASTM A106 Grade B / C
ASTM A106 Grade B is the standard seamless carbon steel pipe specification for high-temperature and high-pressure service in petroleum refineries, gas...
View Full Metallurgy Guide →ASTM A53 Grade B
ASTM A53 Grade B covers seamless (Type S), electric resistance welded (Type E), and furnace butt-welded (Type F) black and hot-dipped galvanized carbo...
View Full Metallurgy Guide →API 5L Line Pipe (Gr. B through X70)
API 5L governs line pipe for the transportation of gas, water, and oil in the petroleum and natural gas industries. Qatar Piping supplies API 5L Grade...
View Full Metallurgy Guide →ASTM A312 Stainless Steel Pipe
ASTM A312 is the definitive standard specification for seamless, straight-seam welded, and heavily cold worked austenitic stainless steel pipe intende...
View Full Metallurgy Guide →ASTM A790 Duplex & Super Duplex Pipe
ASTM A790 covers seamless and straight-seam welded ferritic/austenitic duplex and super duplex stainless steel pipe intended for general corrosive ser...
View Full Metallurgy Guide →ASTM A333 Grade 6 (LTCS)
Standard carbon steels undergo ductile-to-brittle transition at cold temperatures. ASTM A333 Grade 6 is specifically killed and heat-treated (normaliz...
View Full Metallurgy Guide →ASTM A335 Chrome-Moly Alloy Pipe (P11, P22, P91)
ASTM A335 covers seamless ferritic alloy steel pipe intended for high-temperature service in power generation steam lines, refinery hydroprocessing un...
View Full Metallurgy Guide →Request an Industrial Piping Quotation or BOQ Review
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