Knowledge base · Corrosion & Grade Selection
Corrosion Resistance and Grade Selection
Which alloy survives your environment. Guides organised by the failure mode — chloride pitting, sulphide stress cracking, oxidation, carburisation — instead of by alloy name.
8 guides in this topic
API 6A Wellhead Alloys: 718, 625 and 925API 6A wellhead alloys: how PSL level, temperature class and sour service decide between Inconel 718, 625 and Incoloy 925.Published 2026-09-30
Alloys for Wet FGD Scrubbers and AbsorbersWet FGD scrubber alloy selection: which alloy for absorber walls, spray headers and dampers at chloride levels from 20,000 to 80,000 ppm.Published 2026-10-08
Which Alloy for a High-Temperature Furnace? 600 °C to 1250 °CFurnace alloy selection by service temperature and atmosphere — oxidation, carburisation and sulphidation — with the grades that actually hold up at 600, 800, 1000 and 1200 °C.Published 2026-09-17
Nickel Alloys for LNG and Cryogenic ServiceLNG and cryogenic alloy selection at -196 C: 9% Ni steel, 304L, Invar 36, Inconel 625 and 825, with impact testing and pipe standards.Published 2026-10-12
Which Alloys Comply with NACE MR0175 for Sour Service?NACE MR0175 / ISO 15156 sour service alloy selection — what counts as sour, which nickel alloys are pre-qualified, and the hardness limits that still apply.Published 2026-09-17
Alloys for Polysilicon and Semiconductor PlantsPolysilicon and semiconductor plant alloy selection: reduction furnace bells, CVD liners and ultra-high-purity gas and water lines.Published 2026-10-08
Which Alloy Resists Seawater Best? 316L to TitaniumSeawater corrosion alloy selection ranked by pitting resistance equivalent number and critical pitting temperature — from 316L through duplex, super duplex, 6Mo and titanium.Published 2026-09-17
Urea Plant Alloys: 316L Mod, 25-22-2 and DuplexUrea plant alloy selection: how carbamate corrosion decides between 316L Mod, 25-22-2 and duplex stainless for reactors and strippers.Published 2026-10-08
Related reading
- Super Duplex 2507 vs 316L: When Stainless Steel Isn't Enough for Seawater
- Stainless Steel 309S vs 310S: High-Temperature Austenitic Showdown
- Stainless Steel 904L vs 316L: High-Alloy Austenitic for Aggressive Corrosion
- Duplex 2205 vs Stainless Steel 304: Which Corrosion-Resistant Alloy Fits Your Project?
- Hastelloy B-2 vs C-276: Pure Hydrochloric Acid Specialist vs Universal Corrosion Champion
- Hastelloy C-2000 vs C-276: Next-Generation vs Classic Corrosion Alloy
- Hastelloy C-22 vs C-276: Which Corrosion Alloy Wins in Aggressive Media?
- Incoloy 800 vs 825: High-Temperature Workhorse vs Corrosion Specialist
- Incoloy 800 vs Incoloy 800HT: High-Temperature Alloy Evolution
- Inconel 600 vs Stainless Steel 304: When Corrosion Requirements Outgrow Stainless
Grades covered here
Inconel 601UNS N06601 · data sheet
Inconel 625UNS N06625 · data sheet
Inconel 718UNS N07718 · data sheet
Hastelloy C-276UNS N10276 · data sheet
Incoloy 825UNS N08825 · data sheet
Other topics
Product Forms & Specifications17 guidesEvery grade listed here ships with an EN 10204 3.1 certificate, and representative third-party test reports can be downloaded before you order.
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