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![Unalloyed structural steels](/images/uploads/41c1ace7-f92a-486f-bf5b-dbee84fc846d/structural-steel-category-hot-rolled-plate-and-section-1920x1080.jpg)

Category · 452 grades

# Unalloyed structural steels

Unalloyed structural steels include all low-carbon steels in which the iron companions do not exceed specified minimum values. The yield strength, formability and weldability are the decisive factors for their use. They are soft, pliable, tough and stretchy, but cannot be hardened by heat treatment.

| Grade | Material no. | P | S | C | Mn | N | Si |
|---|---|---|---|---|---|---|---|
| [1.0038](/materials/material-no/1.0038 "1.0038") | [1.0038](/materials/material-no/1.0038 "1.0038") | 0,035 | 0,035 | ≤0,17 | ≤1,40 | 0,012 | — |
| [S235JRH](/materials/din-en/s235jrh "S235JRH") | [1.0039](/materials/material-no/1.0039 "1.0039") | 0,04 | 0,04 | ≤0,17 | ≤1,40 | 0,009 | — |
| [Ust 42-2](/materials/din-en/ust-42-2 "Ust 42-2") | [1.0040](/materials/material-no/1.0040 "1.0040") | 0,05 | 0,05 | ≤0,25 | 0,20-0,50 | 0,007 | Spuren/Traces |
| [RSt 42-2](/materials/din-en/rst42-2 "RSt 42-2") | [1.0042](/materials/material-no/1.0042 "1.0042") | 0,05 | 0,05 | ≤0,23 | 0,20-0,50 | 0,007 | 0,03-0,30 |
| [Gr.D](/materials/din-en/gr-d "Gr.D") | [1.0044](/materials/material-no/1.0044 "1.0044") | 0,035 | 0,035 | ≤0,21 | ≤1,50 | 0,012 | — |
| [S355JR](/materials/din-en/s355jr "S355JR") | [1.0045](/materials/material-no/1.0045 "1.0045") | 0,035 | 0,035 | ≤0,24 | ≤1,60 | 0,012 | ≤0,55 |
| [S320GP](/materials/din-en/s320gp "S320GP") | [1.0046](/materials/material-no/1.0046 "1.0046") | 0,045 | 0,045 | ≤0,24 | ≤1,60 | 0,009 | ≤0,55 |
| [E295](/materials/din-en/e295 "E295") | [1.0050](/materials/material-no/1.0050 "1.0050") | 0,045 | 0,045 | — | — | 0,009 | — |
| [E295](/materials/din-en/e295 "E295") | [1.0050](/materials/material-no/1.0050 "1.0050") | 0,045 | 0,045 | — | — | 0,012 | — |
| [St 50-1](/materials/din-en/st-50-1 "St 50-1") | [1.0052](/materials/material-no/1.0052 "1.0052") | 0,08 | 0,05 | ~0,25 | 0,20-0,50 | — | 0,03-0,30 |
| [Ust 34-1](/materials/din-en/ust-34-1 "Ust 34-1") | [1.0055](/materials/material-no/1.0055 "1.0055") | 0,08 | 0,05 | ≤0,17 | 0,20-0,50 | — | Spuren/Traces |
| [RSt 34-1](/materials/din-en/rst-34-1 "RSt 34-1") | [1.0057](/materials/material-no/1.0057 "1.0057") | 0,08 | 0,05 | ≤0,17 | 0,20-0,50 | — | 0,03-0,30 |
| [E335](/materials/din-en/e335 "E335") | [1.0060](/materials/material-no/1.0060 "1.0060") | 0,045 | 0,045 | — | — | 0,009 | — |
| [E335](/materials/din-en/e335 "E335") | [1.0060](/materials/material-no/1.0060 "1.0060") | 0,045 | 0,045 | — | — | 0,0012 | — |
| [St 60-1](/materials/din-en/st-60-1 "St 60-1") | [1.0062](/materials/material-no/1.0062 "1.0062") | 0,08 | 0,05 | ~0,35 | 0,30-0,50 | — | 0,03-0,30 |
| [Ust 37-1](/materials/din-en/ust-37-1 "Ust 37-1") | [1.0065](/materials/material-no/1.0065 "1.0065") | 0,07 | 0,05 | ≤0,20 | 0,20-0,50 | — | Spuren/Traces |
| [RSt 37-1](/materials/din-en/rst-37-1 "RSt 37-1") | [1.0067](/materials/material-no/1.0067 "1.0067") | 0,07 | 0,05 | ≤0,20 | 0,20-0,50 | — | 0,03-0,30 |
| [1.0070](/materials/material-no/1.0070 "1.0070") | [1.0070](/materials/material-no/1.0070 "1.0070") | 0,045 | 0,045 | — | — | 0,012 | — |
| [1.0070](/materials/material-no/1.0070 "1.0070") | [1.0070](/materials/material-no/1.0070 "1.0070") | 0,045 | 0,045 | — | — | 0,009 | — |
| [Ust 42-1](/materials/din-en/ust-42-1 "Ust 42-1") | [1.0075](/materials/material-no/1.0075 "1.0075") | 0,08 | 0,05 | ≤0,25 | 0,20-0,50 | 0,007 | Spuren/Traces |
| [RSt 42-1](/materials/din-en/rst-42-1 "RSt 42-1") | [1.0077](/materials/material-no/1.0077 "1.0077") | 0,08 | 0,05 | ≤0,25 | 0,20-0,50 | — | 0,03-0,30 |
| [S355GP](/materials/din-en/s355gp "S355GP") | [1.0083](/materials/material-no/1.0083 "1.0083") | 0,045 | 0,045 | ≤0,24 | ≤1,60 | 0,009 | ≤0,55 |
| [S235GT](/materials/din-en/s235gt "S235GT") | [1.0106](/materials/material-no/1.0106 "1.0106") | 0,04 | 0,045 | ≤0,20 | ≤1,40 | — | ≤0,05 |
| [P195TR1](/materials/din-en/p195tr1 "P195TR1") | [1.0107](/materials/material-no/1.0107 "1.0107") | 0,025 | 0,02 | ≤0,13 | ≤0,70 | — | ≤0,35 |
| [P195TR2](/materials/din-en/p195tr2 "P195TR2") | [1.0108](/materials/material-no/1.0108 "1.0108") | 0,025 | 0,02 | ≤0,13 | ≤0,70 | — | ≤0,35 |
| [RQSt 34-2](/materials/din-en/rqst-34-2 "RQSt 34-2") | [1.0109](/materials/material-no/1.0109 "1.0109") | — | — | — | — | — | — |
| [HI](/materials/din-en/hi "HI") | [1.0111](/materials/material-no/1.0111 "1.0111") | 0,025 | 0,015 | ≤0,16 | ≤0,30 | 0,009 | ≤0,25 |
| [P235S](/materials/din-en/p235s "P235S") | [1.0112](/materials/material-no/1.0112 "1.0112") | 0,025 | 0,025 | ≤0,16 | 0,40-1,20 | — | ≤0,35 |
| [KSt 37-2](/materials/din-en/kst-37-2 "KSt 37-2") | [1.0113](/materials/material-no/1.0113 "1.0113") | 0,05 | 0,05 | ≤0,17 | 0,20-0,50 | 0,009 | ≤0,30 |
| [A284D](/materials/din-en/a284d "A284D") | [1.0114](/materials/material-no/1.0114 "1.0114") | 0,03 | 0,03 | ≤0,17 | ≤1,40 | 0,012 | — |
| [S235J0C](/materials/din-en/s235j0c "S235J0C") | [1.0115](/materials/material-no/1.0115 "1.0115") | 0,04 | 0,04 | ≤0,17 | ≤1,40 | 0,009 | — |
| [S235J2G3](/materials/din-en/s235j2g3 "S235J2G3") | [1.0116](/materials/material-no/1.0116 "1.0116") | 0,035 | 0,035 | ≤0,17 | ≤1,40 | — | — |
| [S215G](/materials/din-en/s215g "S215G") | [1.0116G](/materials/material-no/1.0116g "1.0116G") | 0,03 | 0,025 | ≤0,18 | ≤1,50 | — | — |
| [Fe360D2](/materials/din-en/fe360d2 "Fe360D2") | [1.0117](/materials/material-no/1.0117 "1.0117") | 0,025 | 0,025 | ≤0,17 | ≤1,40 | — | — |
| [QSt 37-3](/materials/din-en/qst-37-3 "QSt 37-3") | [1.0118](/materials/material-no/1.0118 "1.0118") | 0,035 | 0,035 | ≤0,17 | ≤1,40 | — | — |
| [S235J2C](/materials/din-en/s235j2c "S235J2C") | [1.0119](/materials/material-no/1.0119 "1.0119") | 0,035 | 0,035 | ≤0,17 | ≤1,40 | 0,009 | — |
| [S235JRC](/materials/din-en/s235jrc "S235JRC") | [1.0120](/materials/material-no/1.0120 "1.0120") | 0,045 | 0,045 | ≤0,17 | ≤1,40 | 0,009 | — |
| [S235 JRC](/materials/din-en/s235jrc "S235 JRC") | [1.0121](/materials/material-no/1.0121 "1.0121") | 0,045 | 0,045 | ≤0,17 | ≤1,40 | 0,007 | — |
| [RQSt 37-2](/materials/din-en/rqst-37-2 "RQSt 37-2") | [1.0122](/materials/material-no/1.0122 "1.0122") | 0,035 | 0,035 | ≤0,17 | ≤1,40 | 0,012 | — |
| [QSt 37-3](/materials/din-en/qst-37-3 "QSt 37-3") | [1.0123](/materials/material-no/1.0123 "1.0123") | 0,04 | 0,04 | ≤0,17 | 0,20-0,50 | — | 0,03-0,30 |
| [UKSt 37-2](/materials/din-en/ukst-37-2 "UKSt 37-2") | [1.0124](/materials/material-no/1.0124 "1.0124") | 0,05 | 0,05 | ≤0,17 | 0,20-0,50 | 0,007 | Spuren/Traces |
| [RKSt 37-2](/materials/din-en/rkst-37-2 "RKSt 37-2") | [1.0125](/materials/material-no/1.0125 "1.0125") | 0,05 | 0,05 | ≤0,17 | 0,20-0,50 | 0,009 | 0,03-0,30 |
| [KSt 37-3](/materials/din-en/kst-37-3 "KSt 37-3") | [1.0127](/materials/material-no/1.0127 "1.0127") | 0,04 | 0,04 | ≤0,17 | 0,20-0,50 | — | 0,03-0,30 |
| [QSt 44-2](/materials/din-en/qst-44-2 "QSt 44-2") | [1.0128](/materials/material-no/1.0128 "1.0128") | 0,045 | 0,045 | ≤0,21 | ≤1,50 | 0,009 | — |
| [ZSt 44-2](/materials/din-en/zst-44-2 "ZSt 44-2") | [1.0129](/materials/material-no/1.0129 "1.0129") | 0,05 | 0,05 | ≤0,21 | — | 0,009 | — |
| [P265S](/materials/din-en/p265s "P265S") | [1.0130](/materials/material-no/1.0130 "1.0130") | 0,025 | 0,025 | ≤0,20 | 0,50-1,50 | — | ≤0,40 |
| [QSt 44-3](/materials/din-en/qst-44-3 "QSt 44-3") | [1.0133](/materials/material-no/1.0133 "1.0133") | 0,05 | 0,05 | ≤0,21 | — | 0,009 | — |
| [PSt 44-3](/materials/din-en/pst-44-3 "PSt 44-3") | [1.0135](/materials/material-no/1.0135 "1.0135") | 0,04 | 0,04 | ≤0,20 | — | — | — |
| [St 42-3](/materials/din-en/st-42-3 "St 42-3") | [1.0136](/materials/material-no/1.0136 "1.0136") | 0,045 | 0,045 | ≤0,23 | 0,20-0,50 | 0,009 | 0,03-0,30 |
| [KSt 44-3](/materials/din-en/kst-44-3 "KSt 44-3") | [1.0137](/materials/material-no/1.0137 "1.0137") | 0,04 | 0,04 | ≤0,20 | — | — | — |

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## Standards covering this category

 32

- [**DIN / EN***314 grades*](/materials/din-en "DIN / EN — 314 grades in this category")
- [**JIS***147 grades*](/materials/jis "JIS — 147 grades in this category")
- [**KS***92 grades*](/materials/ks "KS — 92 grades in this category")
- [**BS***60 grades*](/materials/bs "BS — 60 grades in this category")
- [**ČSN***56 grades*](/materials/csn "ČSN — 56 grades in this category")
- [**AISI / SAE***53 grades*](/materials/aisi-sae "AISI / SAE — 53 grades in this category")
- [**AFNOR***52 grades*](/materials/afnor "AFNOR — 52 grades in this category")
- [**UNS***48 grades*](/materials/uns "UNS — 48 grades in this category")
- [**GOST***40 grades*](/materials/gost "GOST — 40 grades in this category")
- [**UNI***38 grades*](/materials/uni "UNI — 38 grades in this category")
- [**GB***36 grades*](/materials/gb "GB — 36 grades in this category")
- [**UNE***33 grades*](/materials/une "UNE — 33 grades in this category")
- [**PN***32 grades*](/materials/pn "PN — 32 grades in this category")
- [**SS***28 grades*](/materials/ss "SS — 28 grades in this category")
- [**ASTM***27 grades*](/materials/astm "ASTM — 27 grades in this category")
- [**STN***27 grades*](/materials/stn "STN — 27 grades in this category")
- [**ÖNORM***26 grades*](/materials/onorm "ÖNORM — 26 grades in this category")
- [**NBN***26 grades*](/materials/nbn "NBN — 26 grades in this category")
- [**MSZ***24 grades*](/materials/msz "MSZ — 24 grades in this category")
- [**ISO***23 grades*](/materials/iso "ISO — 23 grades in this category")
- [**BDS***18 grades*](/materials/bds "BDS — 18 grades in this category")
- [**STAS***17 grades*](/materials/stas "STAS — 17 grades in this category")
- [**SRPS***13 grades*](/materials/srps "SRPS — 13 grades in this category")
- [**SANS***10 grades*](/materials/sans "SANS — 10 grades in this category")
- [**SFS***10 grades*](/materials/sfs "SFS — 10 grades in this category")
- [**NP***7 grades*](/materials/np "NP — 7 grades in this category")
- [**ABNT NBR***7 grades*](/materials/abnt "ABNT NBR — 7 grades in this category")
- [**AS / NZS***7 grades*](/materials/as-nzs "AS / NZS — 7 grades in this category")
- [**NS***5 grades*](/materials/ns "NS — 5 grades in this category")
- [**SNV***4 grades*](/materials/snv "SNV — 4 grades in this category")
- [**CSA***3 grades*](/materials/csa "CSA — 3 grades in this category")
- [**HRN***2 grades*](/materials/hrn "HRN — 2 grades in this category")

## Property ranges

 21

| Property | Unit | Min | Max | Grades |
|---|---|---|---|---|
| ReH | N/mm² | 120 | 550 | 45 |
| Rm | N/mm² | 255 | 1050 | 182 |
| A80 | % | 4 | 32 | 17 |
| Re | N/mm² | 165 | 700 | 145 |
| A | % | 5 | 41 | 151 |
| A5 | % | 7 | 36 | 29 |
| Z | % | 18 | 68 | 23 |
| aK | J/cm² | 29 | 98 | 4 |
| KCU | kJ/m² | 240 | 780 | 6 |
| HB | — | 90 | 255 | 28 |
| HV | — | 100 | 105 | 3 |
| rho | g/cm³ | 7.582 | 7.871 | 319 |
| E | GPa | 141 | 213 | 7 |
| alpha | 10^-6/K | 11 | 15.6 | 6 |
| lambda | W/(m·K) | 27 | 76 | 6 |
| cp | J/(kg·K) | 466 | 875 | 6 |
| rho\_el | nΩ·m | 140 | 1135 | 5 |
| Ac1 | °C | 720 | 745 | 13 |
| Ac3 | °C | 770 | 880 | 13 |
| Ar3 | °C | 755 | 854 | 12 |
| Ar1 | °C | 677 | 700 | 13 |

Derived from 319 grades in this category with a recorded value.

## Composition range

 15

| Property | Unit | Min | Max | Grades |
|---|---|---|---|---|
| B | % | 0.0008 | 0.005 | 1 |
| C | % | 0.004 | 0.6 | 318 |
| N | % | 0.0012 | 0.1 | 85 |
| Al | % | 0.01 | 0.06 | 38 |
| Si | % | 0.03 | 4.5 | 217 |
| P | % | 0.01 | 0.12 | 336 |
| S | % | 0.015 | 0.08 | 336 |
| Ti | % | 0.03 | 0.3 | 26 |
| V | % | 0.02 | 0.2 | 11 |
| Cr | % | 0.12 | 0.5 | 18 |
| Mn | % | 0.03 | 1.9 | 283 |
| Ni | % | 0.12 | 0.3 | 17 |
| Cu | % | 0.03 | 0.55 | 42 |
| Nb | % | 0.01 | 0.08 | 12 |
| Mo | % | 0.05 | 0.35 | 14 |

Derived from 336 grades in this category with a recorded value.

## Heat treatment

 3

| Operation | Min Temperature (°C) | Max Temperature (°C) | Grades |
|---|---|---|---|
| normalizing | — | — | 4 |
| annealing | — | — | 3 |
| tempering | — | — | 1 |