420 S 37 En56C
420 S 37 En56C is a designation in BS for the material held under material number 1.4021, also listed as X20Cr13. It is a material in the category Stainless steels. We list 56 designations recorded for this grade, in the standards DIN / EN, UNS, AISI / SAE, ASTM, BS, AFNOR, UNE, SAE AMS, JIS, GB, GOST, UNI, SS, ČSN, STN, PN, ABNT NBR, SRPS and JUS.
- Material no. 1.4021
- Category Stainless steels · 468 grades
- Designations 56
If you came for one of these
The most-used names for this grade.About Stainless steels
Stainless steels are corrosion-resistant alloy steels whose chromium content promotes a protective passive surface film. They are used for equipment, structures and components exposed to moisture, chemicals or hygienic service, with different alloy compositions selected for corrosion resistance, strength, formability or weldability.
This describes the material class as a whole. Always confirm the individual grade against the standard before ordering.
Also known as
56 designations · 19 standards · nothing hidden- 420 S 37 En56CIndicative
- 420S29Indicative
- 420S37Indicative
- En56CIndicative
Every designation on file is listed — no truncation, no “+ n more”. Each one is itself a route that leads back here.
Chemical composition
6 elements on file · weight %What this alloy is
Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade.
| Element | % by weight |
|---|---|
0.16–0.25 | |
≤ 1 | |
≤ 1 | |
0.04 | |
0.015 | |
12–14 |
The scale is logarithmic, not the element’s raw share of the alloy — the only honest way to fit 0.01 % and 100 % in one picture, and it means every value here can be compared with every other.
| Element | As publishedsource text, verbatim | Min% by weight | Max% by weight | Bound |
|---|---|---|---|---|
| C | 0,16-0,25 | 0.160 | 0.250 | Range |
| Si | ≤1,00 | — | 1.000 | Max |
| P | 0,04 | 0.040 | 0.040 | Exact |
| S | 0,015 | 0.015 | 0.015 | Exact |
| Cr | 12,0-14,0 | 12.000 | 14.000 | Range |
| Mn | ≤1,00 | — | 1.000 | Max |
The published column is the source string byte-for-byte, decimal comma and all; Min and Max are the parsed bounds. Elements not listed have no value on file — they are omitted, never inferred.
Predicted transformation temperatures
Not enough recorded composition to predict a transformation temperature for this grade — missing: Ni, Mo.
Physical & mechanical properties
An absent property means we hold no value for it — it is left out rather than estimated, interpolated from a neighbouring grade, or filled from a handbook. It does not mean the property is undefined for the material.
Properties by condition
10 conditions · 88 valuessplav| Delivery state | RmN/mm² | A5% | HB |
|---|---|---|---|
| Bar, GOST 18907-73 | 510 – 780 | 14 | — |
| 20KH13 ( 20Х13 ) (annealing) , Bar GOST 5949-75 | — | — | 126 – 197 |
| 20KH13 ( 20Х13 ) (normalize, tempering) , Bar GOST 18968-73 | — | — | 207 – 241 |
| 20KH13 ( 20Х13 ) , Forging GOST 25054-81 | — | — | 197 – 248 |
steeljis| Delivery state | RmN/mm² | ReN/mm² | A% | Z% | aKJ/cm² | HB | HRB | HV |
|---|---|---|---|---|---|---|---|---|
| Plate/Sheet Hot-rolled | 520 | 225 | 18 | — | — | — | — | — |
| Bars/Rods | 640 | 440 | 20 | 50 | 78 | — | — | — |
| Hot-rolled | — | — | — | — | — | 223 | 97 | 234 |
steelnumber| Delivery state | HB | HV |
|---|---|---|
| Soft annealed | 230 | 190 – 240 |
steelnumber| Delivery state | HV |
|---|---|
| Quenched and tempered | 480 – 520 |
splav| Dimensionmm | RmN/mm² | A5% |
|---|---|---|
| 1 - 4 | 490 | 20 |
splav| Heat-treated condition | RmN/mm² | ReN/mm² | A5% | Z% | KCUkJ/m² |
|---|---|---|---|---|---|
| Bar, GOST 5949-75 | 650 – 830 | 440 – 635 | 10 – 16 | 50 – 55 | 590 – 780 |
splav| Heat-treated condition | RmN/mm² | ReN/mm² | A5% | Z% | KCUkJ/m² |
|---|---|---|---|---|---|
| Bar, GOST 18968-73 | 670 | 490 – 655 | 18 | 50 | 690 |
splav| Dimensionmm | RmN/mm² | ReN/mm² | A5% | Z% | KCUkJ/m² |
|---|---|---|---|---|---|
| to 600 | 647 | 441 | 14 – 16 | 40 – 50 | 390 – 640 |
splav| Heat-treated condition | RmN/mm² | ReN/mm² | A5% |
|---|---|---|---|
| Sheet trick, GOST 7350-77 | 510 | 375 | 20 |
splav| Temperature°C | Densityg/cm³ | Elastic modulusGPa | Thermal expansion coefficient10^-6/K | Thermal conductivityW/(m·K) | Specific heat capacityJ/(kg·K) | Electrical resistivitynΩ·m |
|---|---|---|---|---|---|---|
| 20 | 7.67 | 218 | — | 23 | — | 588 |
| 100 | 7.66 | 214 | 10.1 | 26 | 461 | 653 |
| 200 | 7.63 | 208 | 11.2 | 26 | 523 | 730 |
| 300 | 7.6 | 200 | 11.5 | 26 | 565 | 800 |
| 400 | 7.57 | 189 | 11.9 | 26 | 628 | 884 |
| 500 | 7.54 | 181 | 12.2 | 27 | 691 | 952 |
| 600 | 7.51 | 169 | 12.8 | 26 | 775 | 1022 |
| 700 | 7.48 | — | 12.8 | 26 | 963 | 1102 |
| 800 | 7.45 | — | 13 | 27 | — | — |
| 900 | — | — | — | 28 | — | — |
Every figure holds only for the condition on its own row. Values are never merged across conditions or across sources, never averaged, and never interpolated between two rows. An em dash means no value on file — never zero. Figures are converted to the unit in the column header; the source’s own wording is kept and shown where the two differ.
Heat treatment
GB /T 1299-2025
- Quenching1000–1050 °CCooling Oil
GJB 2294
- QuenchingTemperature not stated
- Solution annealing1000–1060 °CCooling Oil or Air
- TemperingTemperature not stated
- Ageing600–700 °CCooling Oil
The source lists these operations without stating an order or an alternation. They are shown unordered on purpose.
Supply condition
- AnnealingSteel bard≤75
- Annealing
- Quenching and TemperingTest specimend≤75
- QuenchingTest specimen
- Annealing or TemperingBar
- Quenching and Solution annealing and Tempering and Ageing
Conditions the standard permits on delivery. No temperature or medium is published for these, so no order and no alternation is implied.
Source: www.caishuku.com
Similar grades — and why
Selection rule, stated so you can disagree with it: same number class 1.4, a shared category, and a published range for Cr / Si that overlaps this grade’s. These are neighbours in composition space — they are not equivalents, and none is claimed to be interchangeable with this grade.
Cr 12,0-14,0 · Si ≤1,00
- ΔCr 0.00
- ΔSi 0.00
- 54 designations
Cr 12,0-14,0 · Si ≤1,00
- ΔCr 0.00
- ΔSi 0.00
- 28 designations
Cr 12,0-14,0 · Si ≤1,00
- ΔCr 0.00
- ΔSi 0.00
- 46 designations
Cr 12,0-14,0 · Si ≤1,00
- ΔCr 0.00
- ΔSi 0.00
- 64 designations
Cr 12,0-14,0 · Si ≤1,00
- ΔCr 0.00
- ΔSi 0.00
- 67 designations
Cr 12,0-14,0 · Si ≤1,00
- ΔCr 0.00
- ΔSi 0.00
- 4 designations
Looking for this grade under another name?
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