--- title: "Low-temperature structural steels — 55 grades — Page 2" description: "Low-temperature structural steels are structural steels designed to retain toughness and reliable load-bearing performance in cold service. 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Compare it to detect a real > content change; `generated` moves on every render and is not a change signal. ![Low-temperature structural steels](/images/uploads/6de5ad71-2924-4cf0-bc4a-7e1d3b90cb59/low-temperature-structural-steels-category-frosted-plate-1920x1080.jpg) Category · 55 grades # Low-temperature structural steels Low-temperature structural steels are structural steels designed to retain toughness and reliable load-bearing performance in cold service. Their resistance to brittle fracture at low temperatures makes them suitable for structures, pressure-containing equipment and other components exposed to severe cold. | Grade | Material no. | C | Si | P | S | Mn | Mo | |---|---|---|---|---|---|---|---| | [13MnNi6-3](/materials/din-en/13mnni6-3 "13MnNi6-3") | [1.6217](/materials/material-no/1.6217 "1.6217") | ≤0,16 | ≤0,50 | 0,025 | 0,015 | 0,85-1,70 | — | | [15NiMn6](/materials/din-en/15nimn6 "15NiMn6") | [1.6228](/materials/material-no/1.6228 "1.6228") | ≤0,18 | ≤0,35 | 0,025 | 0,015 | 0,80-1,50 | — | | [X7NiMo6](/materials/din-en/x7nimo6 "X7NiMo6") | [1.6349](/materials/material-no/1.6349 "1.6349") | ≤0,10 | ≤0,35 | 0,025 | 0,02 | 0,60-1,40 | 0,20-0,35 | | [30CrMo4](/materials/din-en/30crmo4 "30CrMo4") | [1.7216](/materials/material-no/1.7216 "1.7216") | 0,27-0,34 | ≤0,35 | 0,035 | 0,035 | 0,35-0,60 | 0,15-0,30 | | [26CrMo4-2](/materials/din-en/26crmo4-2 "26CrMo4-2") | [1.7219](/materials/material-no/1.7219 "1.7219") | 0,22-0,29 | ≤0,35 | 0,03 | 0,025 | 0,50-0,80 | 0,15-0,30 | [Previous](/categories/low-temperature-structural-steels "Previous") Page 2 of 2 ## Standards covering this category 17 - [**JIS***27 grades*](/materials/jis "JIS — 27 grades in this category") - [**DIN / EN***26 grades*](/materials/din-en "DIN / EN — 26 grades in this category") - [**KS***17 grades*](/materials/ks "KS — 17 grades in this category") - [**UNS***16 grades*](/materials/uns "UNS — 16 grades in this category") - [**AISI / SAE***10 grades*](/materials/aisi-sae "AISI / SAE — 10 grades in this category") - [**AFNOR***10 grades*](/materials/afnor "AFNOR — 10 grades in this category") - [**UNE***6 grades*](/materials/une "UNE — 6 grades in this category") - [**BS***5 grades*](/materials/bs "BS — 5 grades in this category") - [**ASTM***4 grades*](/materials/astm "ASTM — 4 grades in this category") - [**GB***3 grades*](/materials/gb "GB — 3 grades in this category") - [**UNI***3 grades*](/materials/uni "UNI — 3 grades in this category") - [**ČSN***3 grades*](/materials/csn "ČSN — 3 grades in this category") - [**ISO***2 grades*](/materials/iso "ISO — 2 grades in this category") - [**GOST***2 grades*](/materials/gost "GOST — 2 grades in this category") - [**MSZ***2 grades*](/materials/msz "MSZ — 2 grades in this category") - [**SAE AMS***1 grade*](/materials/ams "SAE AMS — 1 grade in this category") - [**SRPS***1 grade*](/materials/srps "SRPS — 1 grade in this category") ## Property ranges 10 | Property | Unit | Min | Max | Grades | |---|---|---|---|---| | ReH | N/mm² | 265 | 750 | 8 | | Rm | N/mm² | 380 | 1800 | 39 | | A80 | % | 13 | 13 | 1 | | Re | N/mm² | 205 | 590 | 29 | | A | % | 10 | 35 | 34 | | Z | % | 30 | 38 | 3 | | HB | — | 179 | 223 | 2 | | HRB | — | 85 | 90 | 2 | | HV | — | 210 | 210 | 1 | | rho | g/cm³ | 7.85 | 7.85 | 26 | Derived from 39 grades in this category with a recorded value. ## Composition range 12 | Property | Unit | Min | Max | Grades | |---|---|---|---|---| | C | % | 0.06 | 0.78 | 55 | | Al | % | 0.02 | 0.3 | 3 | | Si | % | 0.1 | 0.6 | 55 | | P | % | 0.015 | 0.035 | 55 | | S | % | 0.005 | 0.035 | 55 | | V | % | 0.01 | 0.05 | 11 | | Cr | % | 0.15 | 1.2 | 8 | | Mn | % | 0.3 | 1.7 | 55 | | Ni | % | 0.3 | 10 | 37 | | Cu | % | 0.3 | 0.3 | 2 | | Nb | % | 0.05 | 0.05 | 2 | | Mo | % | 0.1 | 0.35 | 9 | Derived from 55 grades in this category with a recorded value. ## Related guides 2 - [**Steel Creep, Stress Rupture, and Long-Term High-Temperature Performance**](/wiki/reading-a-datasheet/steel-creep-stress-rupture-and-long-term-high-temperature-performance "Steel Creep, Stress Rupture, and Long-Term High-Temperature Performance") - [**Steel Thermal Expansion and Temperature-Dependent Properties**](/wiki/calculated-values/steel-thermal-expansion-and-temperature-dependent-properties "Steel Thermal Expansion and Temperature-Dependent Properties")