Technical Articles
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AISI 8740 (UNS G87400 / 1.6546 / 40NiCrMo2-2) — AMS 6322 / AMS 6325 Alloy Steel
AISI 8740 is a nickel-chromium-molybdenum alloy steel reaching 930-1080 MPa after quench and temper. Chemical composition, heat …
4340 VAR (UNS G43400) — AMS 6414 / AMS 6454 / AMS 6484 High Strength Steel
4340 VAR (UNS G43400) is a vacuum arc remelted, ultra high strength low alloy steel reaching up …
Tungsten (Wolfram, W) — ASTM B760 / ASTM B777 Refractory Metal
Tungsten (Wolfram, W) is the refractory metal with the highest melting point at 3422 °C and a …
EN AW-7075 (3.4365 / AlZn5.5MgCu) — AMS 4078 / AMS 4124 Aluminium Alloy
EN AW-7075 (3.4365 / AlZn5.5MgCu / AA7075) is an aerospace grade 7xxx series aluminium alloy reaching 510-580 …
EN AW-6060 (3.3206 / AlMgSi0.5) — Aluminium Alloy for Extrusion Profiles
EN AW-6060 (3.3206 / AlMgSi0.5 / AA6060) is a medium strength, heat treatable 6xxx series aluminium alloy …
EN AW-2017A (3.1325 / AlCu4MgSi) — AMS 4110 / AMS 4118 Aluminium Alloy
EN AW-2017A (3.1325 / AlCu4MgSi / AA2017A) is a copper-based, age hardenable 2xxx series aluminium alloy. Chemical …
Ti Grade 5 / Ti-6Al-4V (3.7164 / UNS R56400) — AMS 4911 / AMS 4928 Titanium
Ti Grade 5 (Ti-6Al-4V / 3.7164 / UNS R56400) is the most widely used (alpha+beta) titanium alloy, …
Ti Grade 2 (3.7035 / UNS R50400) — AMS 4902 / AMS 4941 / AMS 4942 / AMS 4951 Titanium
Ti Grade 2 (3.7035 / UNS R50400) is commercially pure titanium combining corrosion resistance, biocompatibility and good …
Nitronic 50 (1.3964 / UNS S20910 / XM-19) — AMS 5764 Stainless Steel
Nitronic 50 (1.3964 / UNS S20910 / XM-19) is a nitrogen-strengthened austenitic stainless steel with roughly twice …
Nimonic 80A (UNS N07080) — ASTM B637 Nickel Super Alloy
Nimonic 80A (UNS N07080 / BS HR1) is an age hardenable nickel-chromium super alloy strengthened by gamma …
Custom 455 (UNS S45500) — AMS 5617 / AMS 5860 Stainless Steel
Custom 455 (UNS S45500) is an age hardenable martensitic stainless steel reaching over 1300 MPa tensile strength …
Waspaloy (2.4654 / UNS N07001) — AMS 5544 / AMS 5706 Nickel Super Alloy
Waspaloy (2.4654 / UNS N07001) is an age hardenable nickel-cobalt-chromium super alloy with creep strength between 700-870 …
Monel K-500 (2.4375 / UNS N05500) — AMS 4676 Nickel-Copper Alloy
Monel K-500 (2.4375 / UNS N05500) is an age hardened nickel-copper alloy with roughly twice the strength …
Monel 400 (2.4360 / UNS N04400) — AMS 4544 / AMS 4675 Nickel-Copper Alloy
Monel 400 (2.4360 / UNS N04400 / ASTM B127) is a nickel-copper alloy with excellent resistance to …
Kovar (1.3981 / UNS K94610) — ASTM F15 Controlled Expansion Alloy
Kovar (1.3981 / UNS K94610 / ASTM F15) is a nickel-iron-cobalt alloy whose thermal expansion matches borosilicate …
Inconel X-750 (2.4669 / UNS N07750) — AMS 5667 / ASTM B637 Nickel Alloy
X-750 (2.4669 / UNS N07750) is an age hardened nickel-chromium super alloy strengthened by gamma prime precipitation …
Hastelloy X (2.4665 / UNS N06002) — AMS 5536 / AMS 5754 Nickel Alloy
Hastelloy X (2.4665 / UNS N06002) is a nickel-chromium-iron-molybdenum super alloy with oxidation resistance and creep strength …
Hastelloy C276 (2.4819 / UNS N10276) — ASTM B574 / ASTM B575 Nickel Alloy
Hastelloy C276 (2.4819 / UNS N10276) is a nickel-molybdenum-chromium super alloy resistant to wet chlorine, hypochlorite, acids …
Hastelloy C22 (2.4602 / UNS N06022) — ASTM B574 / ASTM B575 Nickel Alloy
Hastelloy C22 (2.4602 / UNS N06022) is a nickel-chromium-molybdenum-tungsten super alloy resistant to both oxidising and reducing …
Incoloy 800H (1.4876 / 1.4958 / UNS N08810) — AMS 5766 / AMS 5871 Nickel Alloy
Incoloy 800H (1.4876 / 1.4958 / UNS N08810) is a nickel-iron-chromium super alloy with creep and oxidation …
Inconel 718 (2.4668 / UNS N07718) — AMS 5596 / AMS 5663 Nickel Alloy
Inconel 718 (2.4668 / UNS N07718) is an age hardened nickel super alloy with roughly 1240 MPa …
Inconel 625 (2.4856 / UNS N06625) — AMS 5599 / AMS 5666 / AMS 5837 Nickel Alloy
Inconel 625 (2.4856 / UNS N06625) is a solid solution strengthened nickel-chromium-molybdenum-niobium alloy with outstanding corrosion resistance …
Inconel 601 (2.4851 / UNS N06601) — AMS 5715 / AMS 5870 Nickel Alloy
Inconel 601 (2.4851 / UNS N06601) is an aluminium-bearing nickel-chromium super alloy with oxidation resistance up to …
Inconel 600 (2.4816 / UNS N06600) — AMS 5540 / AMS 5665 Nickel Alloy
Inconel 600 (2.4816 / UNS N06600) is a nickel-chromium super alloy resistant to oxidation, carburisation and chloride …
Nickel 200 / 201 (2.4066 / 2.4068) — AMS 5553 Pure Nickel Alloys
Nickel 200 and Nickel 201 (UNS N02200 / N02201) are commercially pure nickel alloys with a minimum …
AISI F255 (1.4507 / UNS S32550 / Ferralium 255) — Super Duplex Stainless Steel
AISI F255 (1.4507 / UNS S32550 / Ferralium 255) is a copper-alloyed super duplex stainless steel with …
AISI F55 (1.4501 / UNS S32760 / Zeron 100) — Super Duplex Stainless Steel
AISI F55 (1.4501 / UNS S32760 / Zeron 100) is a super duplex stainless steel with a …
AISI F53 (1.4410 / UNS S32750) — Super Duplex Stainless Steel
AISI F53 (1.4410 / UNS S32750) is a super duplex stainless steel with a 50% ferrite – …
AISI 440C (1.4125 / UNS S44004) — AMS 5618 / AMS 5630 / AMS 5880 Stainless Steel
AISI 440C (1.4125 / X105CrMo17) is a high carbon martensitic stainless steel that can be hardened to …
AISI 431 (1.4057 / UNS S43100) — AMS 5628 Stainless Steel
AISI 431 (1.4057 / X17CrNi16-2) is a nickel-alloyed, high strength martensitic stainless steel. Chemical composition, quenching and …
AISI 420 (1.4021 / UNS S42000) — AMS 5506 / AMS 5620 / AMS 5621 Stainless Steel
AISI 420 (1.4021 / X20Cr13) is a high carbon martensitic stainless steel hardenable by heat treatment up …
AISI 321 (1.4541 / UNS S32100) — AMS 5510 / AMS 5645 Stainless Steel
AISI 321 (1.4541 / UNS S32100) is a titanium-stabilised austenitic stainless steel that resists carbide precipitation at …
17-7 PH (1.4568 / UNS S17700) — AMS 5528 / AMS 5529 / AMS 5644 Stainless Steel
17-7 PH (1.4568 / UNS S17700) is a precipitation hardening stainless steel that combines a high elastic …
17-4 PH (1.4542 / AISI 630) — AMS 5604 / AMS 5622 / AMS 5643 Stainless Steel
17-4 PH precipitation hardening martensitic stainless steel: composition, ageing grades, mechanical properties, ASTM and AMS standards, and …
15-5 PH (1.4545 / UNS S15500) — AMS 5622 / AMS 5643 / AMS 5659 Stainless Steel
15-5 PH precipitation hardening martensitic stainless steel: composition, ageing grades, mechanical properties, ASTM and AMS standards, and …
13-8 PH (1.4534 / UNS S13800) — AMS 5629 / AMS 5864 Stainless Steel
13-8 PH precipitation hardening martensitic stainless steel: composition, heat treatment, mechanical properties, AMS and ASTM standards, and …
Maraging 300 (1.6358) — AMS 6514 / AMS 6521 Ultra High Strength Steel
Maraging 300 ultra-high-strength steel: chemical composition, heat treatment, mechanical properties, AMS and ASTM standards, and aerospace and …
Maraging 350 — AMS 6515 Ultra High Strength Steel
Maraging 350 ultra-high-strength steel: chemical composition, heat treatment, mechanical properties, AMS standards, and aerospace and defence applications …
AISI 904L (1.4539 / UNS N08904) — Super Austenitic Stainless Steel
AISI 904L super austenitic stainless steel: chemical composition, mechanical properties, ASTM and AMS standards, and chemical, marine …
Incoloy A-286 (1.4980 / UNS S66286) — AMS 5525 / AMS 5726 Superalloy
Incoloy A-286 iron–nickel–chromium superalloy: chemical composition, mechanical properties, heat treatment, AMS and ASTM standards, and aerospace and …
AISI 410 (1.4006) — AMS 5504 / AMS 5591 / AMS 5613 Martensitic Stainless Steel
AISI 410 martensitic stainless steel: chemical composition, mechanical properties, heat treatment, AMS standards, advantages and disadvantages …
Invar 36 (Alloy 36 / 1.3912) — ASTM F1684 Low Expansion Alloy
Invar 36 (FeNi36 / Alloy 36) low thermal expansion alloy: composition, mechanical properties, AMS and ASTM standards, …
Haynes 25 (L-605) — AMS 5537 / AMS 5759 Cobalt Superalloy
Haynes 25 (Alloy L-605) cobalt-based superalloy: composition, mechanical properties, AMS and ASTM standards, and aerospace, energy and …
AerMet 100 — AMS 6532 / AMS 6478 High Strength Steel
AerMet 100 ultra-high-strength steel: chemical composition, heat treatment, mechanical values, AMS and ASTM standards, and aerospace and …
Comparisons
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63 comparisons
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What Is the Difference Between Inconel 601 and Inconel 600?
Inconel 600 is a corrosion alloy and Inconel 601 a heat-resisting one; chromium and aluminium make the …
What Is the Difference Between Custom 455 and 17-4PH?
The difference between these two precipitation-hardening stainless steels is chromium: Custom 455 gives up chromium for higher …
What Is the Difference Between AISI F55 and AISI F53?
These two super duplexes share a chromium-nickel band; F55 contains copper and tungsten, while F53 offers higher …
What Is the Difference Between AISI F255 and AISI F55?
The difference between these two super duplexes is copper and tungsten: F255 carries copper for acid service, …
What Is the Difference Between AISI 8740 and AISI 4340?
Two low-alloy quench-and-temper steels with the same carbon; 4340’s much higher nickel and chromium give it markedly …
What Is the Difference Between AISI 434 and AISI 430?
AISI 434 has the same chromium as 430; its difference is molybdenum, and that difference is decisive …
What Is the Difference Between AISI 431 and AISI 410?
With higher chromium and added nickel, AISI 431 is the most corrosion-resistant of the hardenable stainless steels; …
What Is the Difference Between AISI 430F and AISI 430?
AISI 430F is 430 with sulphur and molybdenum added: far easier to machine, but it cannot be …
What Is the Difference Between AISI 420B and AISI 420C?
420B and 420C are carbon steps within the same 13 % chromium martensitic family; 420C reaches higher …
What Is the Difference Between AISI 416 and AISI 410?
AISI 416 is the free-machining version of 410: the easiest stainless steel to machine, but behind 410 …
What Is the Difference Between AISI 415 and AISI 410?
AISI 415 is a low-carbon nickel-molybdenum martensitic: tougher, stronger and far more weldable than AISI 410 …
What Is the Difference Between AISI 405 and AISI 410?
AISI 405 contains aluminium and therefore cannot be hardened by quenching; AISI 410 hardens but requires post-weld …
What Is the Difference Between AISI 329 and AISI 318?
AISI 329 is a first-generation duplex and AISI 318 a modern nitrogen-alloyed one; the difference is molybdenum, …
What Is the Difference Between AISI 310 and AISI 314?
AISI 314 has the same chromium and nickel as 310S; its difference is silicon, and that difference …
What Is the Difference Between AISI 303 and AISI 304?
AISI 303 is AISI 304 with sulphur added: it machines far faster, but gives up weldability and …
What Is the Difference Between AISI 316L and Inconel 625?
Inconel 625 is nickel-based and delivers corrosion and temperature resistance far beyond that of 316L …
What Is the Difference Between AISI 316L and Ti Grade 2?
In chloride environments Ti Grade 2 is well ahead of 316L; 316L is economical and easy to …
What Is the Difference Between Ti Grade 5 and AISI 4340?
Ti Grade 5 is half the density and corrosion resistant; AISI 4340 is stronger and far more …
What Is the Difference Between Nitronic 50 and AISI 316L?
Nitronic 50 is an austenitic stainless strengthened with nitrogen and manganese; it gives more than twice the …
What Is the Difference Between 17-7PH and 17-4PH?
17-7PH is semi-austenitic and used for spring applications, 17-4PH martensitic and used for general high strength …
What Is the Difference Between Maraging 300 and Maraging 350?
With raised cobalt and titanium, Maraging 350 moves into a strength class above Maraging 300 …
What Is the Difference Between Haynes 25 (L-605) and Inconel 625?
Haynes 25 is cobalt based and works at higher temperature; Inconel 625 is nickel based with broader …
What Is the Difference Between Nimonic 80A and Waspaloy?
With its cobalt and molybdenum additions Waspaloy works at higher temperature and higher strength than Nimonic 80A …
What Is the Difference Between Incoloy A286 and Inconel 718?
A286 is iron based and more economical; Inconel 718 is nickel based and works at higher temperatures …
What Is the Difference Between Hastelloy X and Inconel 625?
Hastelloy X is optimised for oxidation and creep at high temperature, Inconel 625 for corrosion and strength …
What Is the Difference Between Incoloy 825 and Incoloy 925?
Incoloy 925 is an Incoloy 825 derivative made age-hardenable through aluminium and a higher titanium content …
What Is the Difference Between Incoloy 800H and Incoloy 825?
Incoloy 800H is designed for high-temperature strength, Incoloy 825 for acid corrosion resistance …
What Is the Difference Between Hastelloy B-3 and Hastelloy C-276?
Hastelloy B-3 contains no chromium and was developed for reducing acids; C-276 contains both chromium and molybdenum …
What Is the Difference Between Hastelloy C-22 and Hastelloy C-2000?
C-2000 was developed with a copper addition to resist both oxidising and reducing acids …
What Is the Difference Between EN AW 7075 and EN AW 6082?
EN AW 7075 is among the strongest aluminium grades but cannot be welded; 6082 is the weldable …
What Is the Difference Between EN AW 5083 and EN AW 5754?
EN AW 5083 is the marine standard with higher magnesium and manganese; 5754 is softer and easier …
What Is the Difference Between EN AW 7075 and EN AW 2017A?
EN AW 7075 is zinc-based and stronger; 2017A is copper-based and easier to machine …
What Is the Difference Between EN AW 6082 and EN AW 6060?
EN AW 6082 is used for structural strength, 6060 for thin profiles and surface quality …
What Is the Difference Between Ti Grade 4 and Ti Grade 5?
Ti Grade 4 is the strongest pure titanium grade; Grade 5 is alloyed and can be hardened …
What Is the Difference Between Ti Grade 1 and Ti Grade 2?
Ti Grade 1 is the softest pure titanium grade; Grade 2 is stronger thanks to its slightly …
What Is the Difference Between Ti Grade 5 and Ti Grade 5 ELI?
ELI is the Ti6Al4V version with reduced oxygen and iron limits; its toughness and cryogenic performance are …
What Is the Difference Between Ti Grade 2 and Ti Grade 5?
Ti Grade 2 is pure titanium; Grade 5 delivers three times the strength through aluminium and vanadium …
What Is the Difference Between Invar 36 and Kovar?
Invar 36 gives the lowest possible thermal expansion; Kovar is designed to match the expansion of borosilicate …
What Is the Difference Between Nickel 200 and Nickel 201?
The only difference between Nickel 200 and 201 is the carbon content; 201 was developed for service …
What Is the Difference Between Monel 400 and Monel K-500?
Monel K-500 is a Monel 400 derivative made age-hardenable by adding aluminium and titanium …
What Is the Difference Between Hastelloy C-276 and Hastelloy C-22?
C-276 is molybdenum-weighted and C-22 chromium-weighted; one excels in reducing, the other in oxidising environments …
What Is the Difference Between Inconel 718 and Inconel X-750?
Inconel X-750 hardens through a titanium-based gamma prime phase and is used for springs; 718 hardens with …
What Is the Difference Between Inconel 718 and Waspaloy?
Inconel 718 hardens with niobium, Waspaloy with titanium and aluminium; Waspaloy stays stable at higher temperatures …
What Is the Difference Between Inconel 625 and Inconel 718?
Inconel 625 hardens by solid solution, Inconel 718 by ageing; 718 delivers far higher strength …
What Is the Difference Between Inconel 600 and Inconel 625?
Inconel 600 is a nickel–chromium alloy, Inconel 625 one strengthened with molybdenum and niobium …
What Is the Difference Between Duplex AISI 318 and Super Duplex AISI F53?
Super duplex F53 contains more chromium, molybdenum and nitrogen than duplex 318; it was developed for seawater …
What Is the Difference Between AISI 316L and Duplex AISI 318?
Duplex AISI 318 is a mixture of austenite and ferrite phases; it gives more than twice the …
What Is the Difference Between AISI 430 and AISI 304?
AISI 430 is ferritic and magnetic, AISI 304 austenitic; the element that makes the difference is nickel …
What Is the Difference Between AISI 316L and AISI 904L?
904L contains far more nickel and molybdenum than 316L and was developed for sulphuric and phosphoric acid …
What Is the Difference Between 17-4PH and 13-8PH?
17-4PH hardens with copper, 13-8PH with aluminium; 13-8PH gives a cleaner structure and higher toughness …
What Is the Difference Between 17-4PH and 15-5PH?
15-5PH is the reduced-delta-ferrite version of 17-4PH; its transverse toughness is higher …
What Is the Difference Between AISI 420 and AISI 440C?
AISI 440C contains far more carbon than 420 and reaches 58–62 HRC; 420 stays tougher and is …
What Is the Difference Between AISI 410 and AISI 420?
The difference between AISI 410 and AISI 420 is the carbon content; 420 reaches higher hardness, 410 …
What Is the Difference Between AISI 321 and AISI 316Ti?
AISI 321 and AISI 316Ti are both titanium-stabilised; the difference between them is the molybdenum content …
What Is the Difference Between AISI 304 and AISI 304L?
The only difference between AISI 304 and 304L is the carbon content; 304L is preferred for welded …
What Is the Difference Between AISI 316 and AISI 316L?
The only difference between AISI 316 and 316L is the carbon content; in welded parts that difference …
What Is the Difference Between AISI 304 and AISI 316?
The key difference between AISI 304 and AISI 316 is molybdenum; in chloride-bearing environments that difference is …
What Is the Difference Between AISI 4140 and H11?
AISI 4140 is a quenched and tempered steel, H11 a 5% chromium hot work tool steel. The …
What Is the Difference Between Maraging 250 and Maraging 300?
The difference between Maraging 250 and Maraging 300 lies in cobalt and titanium; both are carbon-free, nickel-based …
What Is the Difference Between 300M and AerMet 100?
300M and AerMet 100 are in a similar strength class; the difference emerges in toughness and reduction …
What Is the Difference Between AISI 4340 and 300M?
300M is essentially an AISI 4340 derivative with raised silicon and vanadium. The strength difference and landing …
What Is the Difference Between AISI 8620 and AISI 9310?
The difference between AISI 8620 and AISI 9310 lies in the nickel content and in the core …
What Is the Difference Between AISI 4140 and AISI 4340?
The key difference between AISI 4140 and AISI 4340 is nickel. Chemical composition, mechanical values, AMS/UNS equivalents …











































































































