--- title: "Hydrogen resistant steels — 8 grades with composition" description: "Hydrogen resistant steels are steels designed to withstand hydrogen-related damage, including hydrogen embrittlement and hydrogen attack. 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Compare it to detect a real > content change; `generated` moves on every render and is not a change signal. ![Hydrogen resistant steels](/images/uploads/2adc9d95-4be3-4f20-b31e-e40239fb3692/hydrogen-resistant-steels-category-thick-wall-vessel-section-1920x1080.jpg) Category · 8 grades # Hydrogen resistant steels Hydrogen resistant steels are steels designed to withstand hydrogen-related damage, including hydrogen embrittlement and hydrogen attack. They are used for pressure vessels, piping and process equipment exposed to hydrogen-containing environments, where resistance to hydrogen ingress and loss of toughness is important. | Grade | Material no. | C | Si | P | S | Cr | Mn | |---|---|---|---|---|---|---|---| | [26CrMo7](/materials/din-en/26crmo7 "26CrMo7") | [1.7259](/materials/material-no/1.7259 "1.7259") | 0,22-0,30 | 0,15-0,35 | 0,035 | 0,035 | 1,50-1,80 | 0,50-0,70 | | [24CrMo10](/materials/din-en/24crmo10 "24CrMo10") | [1.7273](/materials/material-no/1.7273 "1.7273") | 0,20-0,28 | 0,15-0,35 | 0,035 | 0,035 | 2,30-2,60 | 0,50-0,80 | | [10CrMo11](/materials/din-en/10crmo11 "10CrMo11") | [1.7276](/materials/material-no/1.7276 "1.7276") | 0,08-0,12 | 0,15-0,35 | 0,035 | 0,035 | 2,70-3,00 | 0,30-0,50 | | [16CrMo9-3](/materials/din-en/16crmo9-3 "16CrMo9-3") | [1.7281](/materials/material-no/1.7281 "1.7281") | 0,12-0,20 | 0,15-0,35 | 0,035 | 0,035 | 2,00-2,50 | 0,30-0,50 | | [1.7362](/materials/material-no/1.7362 "1.7362") | [1.7362](/materials/material-no/1.7362 "1.7362") | 0,10-0,15 | ≤0,50 | 0,02 | 0,005 | 4,00-6,00 | 0,30-0,60 | | [X11CrMo9-1](/materials/din-en/x11crmo9-1 "X11CrMo9-1") | [1.7386](/materials/material-no/1.7386 "1.7386") | 0,08-0,15 | 0,25-1,00 | 0,025 | 0,02 | 8,00-10,0 | 0,30-0,60 | | [17CrMoV10](/materials/din-en/17crmov10 "17CrMoV10") | [1.7766](/materials/material-no/1.7766 "1.7766") | 0,15-0,20 | 0,15-0,35 | 0,035 | 0,035 | 2,70-3,00 | 0,30-0,50 | | [20CrMoV13-5-5](/materials/din-en/20crmov13-5-5 "20CrMoV13-5-5") | [1.7779](/materials/material-no/1.7779 "1.7779") | 0,17-0,23 | 0,15-0,35 | 0,025 | 0,02 | 3,00-3,30 | 0,30-0,50 | ## Standards covering this category 14 - [**DIN / EN***8 grades*](/materials/din-en "DIN / EN — 8 grades in this category") - [**ČSN***5 grades*](/materials/csn "ČSN — 5 grades in this category") - [**UNS***2 grades*](/materials/uns "UNS — 2 grades in this category") - [**AISI / SAE***2 grades*](/materials/aisi-sae "AISI / SAE — 2 grades in this category") - [**ASTM***2 grades*](/materials/astm "ASTM — 2 grades in this category") - [**JIS***2 grades*](/materials/jis "JIS — 2 grades in this category") - [**GOST***2 grades*](/materials/gost "GOST — 2 grades in this category") - [**BS***1 grade*](/materials/bs "BS — 1 grade in this category") - [**AFNOR***1 grade*](/materials/afnor "AFNOR — 1 grade in this category") - [**GB***1 grade*](/materials/gb "GB — 1 grade in this category") - [**UNI***1 grade*](/materials/uni "UNI — 1 grade in this category") - [**PN***1 grade*](/materials/pn "PN — 1 grade in this category") - [**MSZ***1 grade*](/materials/msz "MSZ — 1 grade in this category") - [**STAS***1 grade*](/materials/stas "STAS — 1 grade in this category") ## Property ranges 17 | Property | Unit | Min | Max | Grades | |---|---|---|---|---| | ReH | N/mm² | 300 | 320 | 1 | | Rm | N/mm² | 390 | 690 | 1 | | Re | N/mm² | 215 | 235 | 1 | | A5 | % | 18 | 22 | 1 | | Z | % | 50 | 50 | 1 | | KCU | kJ/m² | 1180 | 1180 | 1 | | HB | — | 170 | 337 | 1 | | rho | g/cm³ | 7.58 | 7.85 | 8 | | E | GPa | 102 | 211 | 1 | | alpha | 10^-6/K | 11.3 | 12.5 | 1 | | lambda | W/(m·K) | 33 | 37 | 1 | | cp | J/(kg·K) | 483 | 483 | 1 | | rho\_el | nΩ·m | 430 | 430 | 1 | | Ac1 | °C | 815 | 815 | 1 | | Ac3 | °C | 848 | 848 | 1 | | Ar3 | °C | 775 | 775 | 1 | | Ar1 | °C | 718 | 718 | 1 | Derived from 8 grades in this category with a recorded value. ## Composition range 12 | Property | Unit | Min | Max | Grades | |---|---|---|---|---| | C | % | 0.08 | 0.3 | 8 | | N | % | 0.012 | 0.012 | 1 | | Al | % | 0.04 | 0.04 | 2 | | Si | % | 0.15 | 1 | 8 | | P | % | 0.02 | 0.035 | 8 | | S | % | 0.005 | 0.035 | 8 | | V | % | 0.1 | 0.55 | 2 | | Cr | % | 1.5 | 10 | 8 | | Mn | % | 0.3 | 0.8 | 8 | | Ni | % | 0.3 | 0.8 | 3 | | Cu | % | 0.3 | 0.3 | 3 | | Mo | % | 0.2 | 1.1 | 8 | Derived from 8 grades in this category with a recorded value. ## Heat treatment 2 | Operation | Min Temperature (°C) | Max Temperature (°C) | Grades | |---|---|---|---| | quenching | 1150 | 1180 | 1 | | ageing | 485 | 570 | 1 | ## Related guides 1 - [**Steel Weldability and Hydrogen Cracking Prevention**](/wiki/reading-a-datasheet/steel-weldability-and-hydrogen-cracking-prevention "Steel Weldability and Hydrogen Cracking Prevention")