Grade Comparisons
Side by side
Grades that look identical on the yard floor can differ by several points of iron, molybdenum or niobium. Each comparison shows what separates two grades and what to check on XRF.
Comparisons
Commonly Confused Grades
Open a comparison for composition side by side, where each grade is used and the reading that settles it.
Inconel 625 vs Inconel 718
Inconel 625 is a solid-solution nickel-chromium-molybdenum alloy (about 9% Mo, under 5% Fe) chosen for corrosion resistance.
Read comparisonInconel 600 vs Inconel 625
Inconel 600 is a plain nickel-chromium-iron alloy with about 15.5% chromium and 8% iron.
Read comparisonHastelloy C-22 vs Hastelloy C-276
Hastelloy C-22 has more chromium (about 22%) and less molybdenum (13%) than C-276 (15.5% Cr, 16% Mo), which makes it better in oxidising conditions.
Read comparisonMonel 400 vs Monel K-500
Monel K-500 is Monel 400 with about 2.7% aluminium and 0.6% titanium added, so it can be age-hardened to much higher strength.
Read comparisonDuplex 2205 vs Super Duplex 2507
Super duplex 2507 carries more chromium (25% against 22.5%), molybdenum (4% against 3.1%), nickel (7% against 5.5%) and nitrogen than duplex 2205, giving a PREN above 40 against about 35.
Read comparisonInconel vs Hastelloy
Inconel alloys are mostly nickel-chromium, built for oxidation resistance and strength at temperature.
Read comparisonInconel vs Incoloy
Inconel alloys are nickel-base, typically 50–76% nickel.
Read comparisonTitanium vs Nickel Alloy
Titanium is a light metal (about 4.5 g/cm³) with a hexagonal crystal structure.
Read comparisonInconel 625 vs Hastelloy C-276
Inconel 625 carries about 21.5% chromium, 9% molybdenum and 3.6% niobium.
Read comparisonInconel 600 vs Inconel 601
Inconel 600 is about 15.5% chromium and 8% iron.
Read comparisonInconel 600 vs Inconel 690
Inconel 690 has about 29% chromium against about 15.5% in Inconel 600.
Read comparisonIncoloy 825 vs Inconel 625
Incoloy 825 is an iron-nickel-chromium alloy with about 42% nickel, 30% iron, 3% molybdenum and 2% copper.
Read comparisonHastelloy X vs Haynes 230
Hastelloy X has about 22% chromium, 18.5% iron and 9% molybdenum.
Read comparisonHastelloy B-2 vs C-276
Hastelloy B-2 is nickel with about 28% molybdenum and almost no chromium.
Read comparisonSuper Duplex 2507 vs S32760
Both are super duplex stainless steels with about 25% chromium and 7% nickel.
Read comparisonTitanium Grade 2 vs Grade 5
Titanium Grade 2 is commercially pure titanium.
Read comparisonNimonic 75 vs Nimonic 80a
Both are nickel with about 20% chromium.
Read comparisonInconel 718 vs Inconel 706
Inconel 718 has about 18.5% iron, 19% chromium, 5% niobium and 3% molybdenum.
Read comparisonIncoloy 825 vs Incoloy 925
Incoloy 925 is the age-hardenable version of 825.
Read comparisonTitanium Grade 2 vs Grade 7
Titanium Grade 7 is Grade 2 with about 0.15% palladium added for resistance to reducing acids.
Read comparisonInteractive
Compare Any Two Grades
Pick two grades to see their nominal composition side by side and the elements that separate them.
Also available as a standalone alloy comparison tool.
Questions
FAQ
Why compare nickel alloy grades?
Because grades that look identical can differ by several points of iron, molybdenum, niobium or chromium, which changes both their value and their melting route.
Can XRF tell these grades apart?
In most pairs, yes. Each comparison lists the XRF-visible elements that separate the two grades, and flags where light elements need OES or a lab.
Not Sure Which Grade You Have?
Send us photographs, markings or readings and we’ll review your enquiry.