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![High-strength steels](/images/uploads/fa2a9f08-f0e4-4bcd-b6ff-2699c8460f32/high-strength-steels-category-quenched-bar-ends-1920x1080.jpg)

Category · 128 grades

# High-strength steels

High-strength steels are steels designed to carry high loads while resisting deformation. They are used for load-bearing structures, vehicles and machinery where strength, durability and reduced material weight are important.

| Grade | Material no. | C | Si | P | S | Cr | Mn |
|---|---|---|---|---|---|---|---|
| [24MnCr5-5](/materials/din-en/24mncr5-5 "24MnCr5-5") | [1.8722](/materials/material-no/1.8722 "1.8722") | ≤0,22 | ≤0,80 | 0,025 | 0,012 | ≤1,30 | ≤1,50 |
| [L245](/materials/din-en/l245 "L245") | [1.8723](/materials/material-no/1.8723 "1.8723") | — | — | — | — | — | — |
| [L390](/materials/din-en/l390 "L390") | [1.8724](/materials/material-no/1.8724 "1.8724") | — | — | — | — | — | — |
| [L415](/materials/din-en/l415 "L415") | [1.8725](/materials/material-no/1.8725 "1.8725") | — | — | — | — | — | — |
| [L450](/materials/din-en/l450 "L450") | [1.8726](/materials/material-no/1.8726 "1.8726") | — | — | — | — | — | — |
| [L485](/materials/din-en/l485 "L485") | [1.8727](/materials/material-no/1.8727 "1.8727") | — | — | — | — | — | — |
| [L290](/materials/din-en/l290 "L290") | [1.8728](/materials/material-no/1.8728 "1.8728") | — | — | — | — | — | — |
| [L320](/materials/din-en/l320 "L320") | [1.8729](/materials/material-no/1.8729 "1.8729") | — | — | — | — | — | — |
| [L360](/materials/din-en/l360 "L360") | [1.8730](/materials/material-no/1.8730 "1.8730") | — | — | — | — | — | — |
| [25MnCr4-3](/materials/din-en/25mncr4-3 "25MnCr4-3") | [1.8731](/materials/material-no/1.8731 "1.8731") | ≤0,30 | ~0,70 | 0,025 | 0,025 | ~0,80 | ~1,00 |
| [26MnCr4-3](/materials/din-en/26mncr4-3 "26MnCr4-3") | [1.8732](/materials/material-no/1.8732 "1.8732") | ≤0,30 | ~0,70 | 0,025 | 0,025 | ~0,80 | ~1,00 |
| [27MnCr4-3](/materials/din-en/27mncr4-3 "27MnCr4-3") | [1.8733](/materials/material-no/1.8733 "1.8733") | ≤0,30 | ~0,70 | 0,025 | 0,025 | ~0,80 | ~1,00 |
| [28MnCr4-3](/materials/din-en/28mncr4-3 "28MnCr4-3") | [1.8734](/materials/material-no/1.8734 "1.8734") | ≤0,30 | ~0,70 | 0,025 | 0,025 | ~0,80 | ~1,00 |
| [40MnCrNiMo6-6-6](/materials/din-en/40mncrnimo6-6-6 "40MnCrNiMo6-6-6") | [1.8735](/materials/material-no/1.8735 "1.8735") | ≤0,40 | ≤0,80 | 0,025 | 0,01 | ≤1,50 | ≤1,50 |
| [L415N](/materials/din-en/l415n "L415N") | [1.8736](/materials/material-no/1.8736 "1.8736") | — | — | — | — | — | — |
| [L245Q](/materials/din-en/l245q "L245Q") | [1.8737](/materials/material-no/1.8737 "1.8737") | — | — | — | — | — | — |
| [L290Q](/materials/din-en/l290q "L290Q") | [1.8738](/materials/material-no/1.8738 "1.8738") | — | — | — | — | — | — |
| [L320Q](/materials/din-en/l320q "L320Q") | [1.8739](/materials/material-no/1.8739 "1.8739") | — | — | — | — | — | — |
| [L390Q](/materials/din-en/l390q "L390Q") | [1.8740](/materials/material-no/1.8740 "1.8740") | — | — | — | — | — | — |
| [L360Q](/materials/din-en/l360q "L360Q") | [1.8741](/materials/material-no/1.8741 "1.8741") | — | — | — | — | — | — |
| [L415Q](/materials/din-en/l415q "L415Q") | [1.8742](/materials/material-no/1.8742 "1.8742") | — | — | — | — | — | — |
| [L450Q](/materials/din-en/l450q "L450Q") | [1.8743](/materials/material-no/1.8743 "1.8743") | — | — | — | — | — | — |
| [L485Q](/materials/din-en/l485q "L485Q") | [1.8744](/materials/material-no/1.8744 "1.8744") | — | — | — | — | — | — |
| [L555Q](/materials/din-en/l555q "L555Q") | [1.8745](/materials/material-no/1.8745 "1.8745") | — | — | — | — | — | — |
| [L245M](/materials/din-en/l245m "L245M") | [1.8746](/materials/material-no/1.8746 "1.8746") | — | — | — | — | — | — |
| [L290M](/materials/din-en/l290m "L290M") | [1.8747](/materials/material-no/1.8747 "1.8747") | — | — | — | — | — | — |
| [L320M](/materials/din-en/l320m "L320M") | [1.8748](/materials/material-no/1.8748 "1.8748") | — | — | — | — | — | — |
| [L360M](/materials/din-en/l360m "L360M") | [1.8749](/materials/material-no/1.8749 "1.8749") | — | — | — | — | — | — |
| [S420NH](/materials/din-en/s420nh "S420NH") | [1.8750](/materials/material-no/1.8750 "1.8750") | ≤0,22 | ≤0,60 | 0,035 | 0,03 | ≤0,30 | 1,00-1,70 |
| [S420NLH](/materials/din-en/s420nlh "S420NLH") | [1.8751](/materials/material-no/1.8751 "1.8751") | ≤0,22 | ≤0,60 | 0,03 | 0,025 | ≤0,30 | 1,00-1,70 |
| [L415M](/materials/din-en/l415m "L415M") | [1.8752](/materials/material-no/1.8752 "1.8752") | — | — | — | — | — | — |
| [L625M](/materials/din-en/l625m "L625M") | [1.8753](/materials/material-no/1.8753 "1.8753") | — | — | — | — | — | — |
| [L450M](/materials/din-en/l450m "L450M") | [1.8754](/materials/material-no/1.8754 "1.8754") | — | — | — | — | — | — |
| [L830M](/materials/din-en/l830m "L830M") | [1.8755](/materials/material-no/1.8755 "1.8755") | — | — | — | — | — | — |
| [L485M](/materials/din-en/l485m "L485M") | [1.8756](/materials/material-no/1.8756 "1.8756") | — | — | — | — | — | — |
| [L360NS](/materials/din-en/l360ns "L360NS") | [1.8757](/materials/material-no/1.8757 "1.8757") | — | — | — | — | — | — |
| [L555M](/materials/din-en/l555m "L555M") | [1.8758](/materials/material-no/1.8758 "1.8758") | — | — | — | — | — | — |
| [L360QS](/materials/din-en/l360qs "L360QS") | [1.8759](/materials/material-no/1.8759 "1.8759") | — | — | — | — | — | — |
| [L390QS](/materials/din-en/l390qs "L390QS") | [1.8760](/materials/material-no/1.8760 "1.8760") | — | — | — | — | — | — |
| [L415QS](/materials/din-en/l415qs "L415QS") | [1.8761](/materials/material-no/1.8761 "1.8761") | — | — | — | — | — | — |
| [L450QS](/materials/din-en/l450qs "L450QS") | [1.8762](/materials/material-no/1.8762 "1.8762") | — | — | — | — | — | — |
| [L485QS](/materials/din-en/l485qs "L485QS") | [1.8763](/materials/material-no/1.8763 "1.8763") | — | — | — | — | — | — |
| [L415MS](/materials/din-en/l415ms "L415MS") | [1.8766](/materials/material-no/1.8766 "1.8766") | — | — | — | — | — | — |
| [L450MS](/materials/din-en/l450ms "L450MS") | [1.8767](/materials/material-no/1.8767 "1.8767") | — | — | — | — | — | — |
| [L485MS](/materials/din-en/l485ms "L485MS") | [1.8768](/materials/material-no/1.8768 "1.8768") | — | — | — | — | — | — |
| [S800QL](/materials/din-en/s800ql "S800QL") | [1.8770](/materials/material-no/1.8770 "1.8770") | ≤0,20 | ≤0,80 | 0,02 | 0,01 | ≤1,50 | ≤1,60 |
| [L360QO](/materials/din-en/l360qo "L360QO") | [1.8771](/materials/material-no/1.8771 "1.8771") | — | — | — | — | — | — |
| [L390QO](/materials/din-en/l390qo "L390QO") | [1.8772](/materials/material-no/1.8772 "1.8772") | — | — | — | — | — | — |
| [L415QO](/materials/din-en/l415qo "L415QO") | [1.8773](/materials/material-no/1.8773 "1.8773") | — | — | — | — | — | — |
| [L450QO](/materials/din-en/l450qo "L450QO") | [1.8774](/materials/material-no/1.8774 "1.8774") | — | — | — | — | — | — |

 [Previous](/categories/high-strength-steels "Previous") Page 2 of 3[Next](/categories/high-strength-steels/page/3 "Next")

## Standards covering this category

 12

- [**DIN / EN***102 grades*](/materials/din-en "DIN / EN — 102 grades in this category")
- [**JIS***27 grades*](/materials/jis "JIS — 27 grades in this category")
- [**AFNOR***4 grades*](/materials/afnor "AFNOR — 4 grades in this category")
- [**UNS***3 grades*](/materials/uns "UNS — 3 grades in this category")
- [**AISI / SAE***3 grades*](/materials/aisi-sae "AISI / SAE — 3 grades in this category")
- [**KS***3 grades*](/materials/ks "KS — 3 grades in this category")
- [**SS***2 grades*](/materials/ss "SS — 2 grades in this category")
- [**ČSN***2 grades*](/materials/csn "ČSN — 2 grades in this category")
- [**ISO***1 grade*](/materials/iso "ISO — 1 grade in this category")
- [**GB***1 grade*](/materials/gb "GB — 1 grade in this category")
- [**GOST***1 grade*](/materials/gost "GOST — 1 grade in this category")
- [**STN***1 grade*](/materials/stn "STN — 1 grade in this category")

## Property ranges

 5

| Property | Unit | Min | Max | Grades |
|---|---|---|---|---|
| ReH | N/mm² | 390 | 960 | 8 |
| Rm | N/mm² | 340 | 1150 | 34 |
| Re | N/mm² | 175 | 700 | 26 |
| A | % | 6 | 35 | 27 |
| rho | g/cm³ | 7.85 | 7.85 | 102 |

Derived from 102 grades in this category with a recorded value.

## Composition range

 17

| Property | Unit | Min | Max | Grades |
|---|---|---|---|---|
| B | % | 0.0002 | 0.005 | 27 |
| C | % | 0.09 | 0.55 | 62 |
| N | % | 0.006 | 0.025 | 17 |
| Al | % | 0.015 | 0.05 | 8 |
| Si | % | 0.15 | 0.8 | 59 |
| P | % | 0.015 | 0.08 | 62 |
| S | % | 0.005 | 0.035 | 62 |
| Ti | % | 0.01 | 0.05 | 14 |
| V | % | 0.03 | 0.2 | 30 |
| Cr | % | 0.3 | 1.6 | 50 |
| Mn | % | 0.6 | 2 | 62 |
| Ni | % | 0.05 | 2 | 36 |
| Cu | % | 0.15 | 1.5 | 29 |
| Zr | % | 0.15 | 0.15 | 6 |
| Nb | % | 0.03 | 0.06 | 18 |
| Mo | % | 0.1 | 1 | 48 |
| W | % | 0.1 | 1.5 | 3 |

Derived from 62 grades in this category with a recorded value.

## Related guides

 2

- [**High-Strength Low-Alloy Steels: Grades, Microalloying, Processing, and Properties**](/wiki/steel-families/high-strength-low-alloy-steels "High-Strength Low-Alloy Steels: Grades, Microalloying, Processing, and Properties")
- [**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")