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श्रेणी · 156 ग्रेड

# कोल्ड-एक्सट्रूज़न इस्पात

कोल्ड-एक्सट्रूज़न इस्पात ऐसे इंजीनियरिंग पदार्थ होते हैं, जिन्हें कोल्ड फॉर्मिंग और एक्सट्रूज़न द्वारा अवयवों का आकार देने के लिए बनाया जाता है। इनमें पर्याप्त प्लास्टिक विरूपण के लिए आवश्यक डक्टिलिटी तथा कोल्ड-फॉर्म्ड फास्टनर, ऑटोमोटिव पुर्जों और अन्य प्रिसीजन अवयवों के लिए आवश्यक सामर्थ्य और टफनेस का संयोजन होता है।

| ग्रेड | सामग्री संख्या | C | P | S | Mn | Si | Cr |
|---|---|---|---|---|---|---|---|
| [SWRCH19A](/hi/सामग्री/jis/swrch19a "SWRCH19A") | — | 0.15 - 0.2 | max 0.03 | max 0.035 | 0.7 - 1 | max 0.1 | max 0.2 |
| [SCM425HRCH](/hi/सामग्री/jis/scm425hrch "SCM425HRCH") | — | 0.23 - 0.28 | max 0.03 | max 0.03 | 0.55 - 0.95 | 0.15 - 0.35 | 0.85 - 1.25 |
| [SWCHB323](/hi/सामग्री/jis/swchb323 "SWCHB323") | — | 0.2 - 0.26 | max 0.03 | max 0.03 | 0.7 - 1 | 0.1 - 0.35 | — |
| [SWCH25A](/hi/सामग्री/jis/swch25a "SWCH25A") | — | — | — | — | — | — | — |
| [SWRCH10K](/hi/सामग्री/jis/swrch10k "SWRCH10K") | — | 0.08 - 0.13 | max 0.03 | max 0.035 | 0.3 - 0.6 | 0.1 - 0.35 | max 0.2 |
| [SCM440RCH](/hi/सामग्री/jis/scm440rch "SCM440RCH") | — | 0.38 - 0.43 | max 0.03 | max 0.03 | 0.6 - 0.9 | 0.15 - 0.35 | 0.9 - 1.2 |
| [SWCHB526](/hi/सामग्री/jis/swchb526 "SWCHB526") | — | 0.23 - 0.29 | max 0.03 | max 0.03 | 0.9 - 1.2 | 0.1 - 0.35 | — |
| [SWCH16K](/hi/सामग्री/jis/swch16k "SWCH16K") | — | — | — | — | — | — | — |
| [SWRCH17K](/hi/सामग्री/jis/swrch17k "SWRCH17K") | — | 0.15 - 0.2 | max 0.03 | max 0.035 | 0.3 - 0.6 | 0.1 - 0.35 | max 0.2 |
| [SCM822RCH](/hi/सामग्री/jis/scm822rch "SCM822RCH") | — | 0.2 - 0.25 | max 0.03 | max 0.03 | 0.6 - 0.9 | 0.15 - 0.35 | 0.9 - 1.2 |
| [SWCHB734](/hi/सामग्री/jis/swchb734 "SWCHB734") | — | 0.31 - 0.37 | max 0.03 | max 0.03 | 1.2 - 1.5 | 0.1 - 0.35 | — |
| [SWCH22K](/hi/सामग्री/jis/swch22k "SWCH22K") | — | — | — | — | — | — | — |
| [SWRCH24K](/hi/सामग्री/jis/swrch24k "SWRCH24K") | — | 0.19 - 0.25 | max 0.03 | max 0.035 | 1.35 - 1.65 | 0.1 - 0.35 | max 0.2 |
| [SNC631RCH](/hi/सामग्री/jis/snc631rch "SNC631RCH") | — | 0.27 - 0.35 | max 0.03 | max 0.03 | 0.35 - 0.65 | 0.15 - 0.35 | 0.6 - 1 |
| [SMn433HRCH](/hi/सामग्री/jis/smn433hrch "SMn433HRCH") | — | 0.29 - 0.36 | max 0.03 | max 0.03 | 1.15 - 1.55 | 0.15 - 0.35 | max 0.35 |
| [SWCH30K](/hi/सामग्री/jis/swch30k "SWCH30K") | — | — | — | — | — | — | — |
| [SWRCH33K](/hi/सामग्री/jis/swrch33k "SWRCH33K") | — | 0.3 - 0.36 | max 0.03 | max 0.035 | 0.6 - 0.9 | 0.1 - 0.35 | max 0.2 |
| [SNCM220RCH](/hi/सामग्री/jis/sncm220rch "SNCM220RCH") | — | 0.17 - 0.23 | max 0.03 | max 0.03 | 0.6 - 0.9 | 0.15 - 0.35 | 0.4 - 0.6 |
| [SMn443HRCH](/hi/सामग्री/jis/smn443hrch "SMn443HRCH") | — | 0.29 - 0.36 | max 0.03 | max 0.03 | 1.15 - 1.55 | 0.15 - 0.35 | max 0.35 |
| [SWCH40K](/hi/सामग्री/jis/swch40k "SWCH40K") | — | — | — | — | — | — | — |
| [SWRCH41K](/hi/सामग्री/jis/swrch41k "SWRCH41K") | — | 0.36 - 0.44 | max 0.03 | max 0.035 | 1.35 - 1.65 | 0.1 - 0.35 | max 0.2 |
| [SNCM420HRCH](/hi/सामग्री/jis/sncm420hrch "SNCM420HRCH") | — | 0.17 - 0.23 | max 0.03 | max 0.03 | 0.4 - 0.7 | 0.15 - 0.35 | 0.35 - 0.65 |
| [SCr415HRCH](/hi/सामग्री/jis/scr415hrch "SCr415HRCH") | — | 0.12 - 0.18 | max 0.03 | max 0.03 | 0.55 - 0.95 | 0.15 - 0.35 | 0.85 - 1.25 |
| [SWCH48K](/hi/सामग्री/jis/swch48k "SWCH48K") | — | — | — | — | — | — | — |
| [SWRCH50K](/hi/सामग्री/jis/swrch50k "SWRCH50K") | — | 0.47 - 0.53 | max 0.03 | max 0.035 | 0.6 - 0.9 | 0.1 - 0.35 | max 0.2 |
| [SWCH6R](/hi/सामग्री/jis/swch6r "SWCH6R") | — | — | — | — | — | — | — |
| [SWRCHB320](/hi/सामग्री/jis/swrchb320 "SWRCHB320") | — | 0.17 - 0.23 | max 0.03 | max 0.03 | 0.7 - 1 | 0.1 - 0.35 | — |
| [SWCH12R](/hi/सामग्री/jis/swch12r "SWCH12R") | — | — | — | — | — | — | — |
| [SWRCH12R](/hi/सामग्री/jis/swrch12r "SWRCH12R") | — | 0.1 - 0.15 | max 0.04 | max 0.04 | 0.3 - 0.6 | — | max 0.2 |
| [SCr440RCH](/hi/सामग्री/jis/scr440rch "SCr440RCH") | — | 0.38 - 0.43 | max 0.03 | max 0.03 | 0.6 - 0.9 | 0.15 - 0.35 | 0.9 - 1.2 |
| [SWRCHB420](/hi/सामग्री/jis/swrchb420 "SWRCHB420") | — | 0.17 - 0.23 | max 0.03 | max 0.03 | 0.8 - 1.1 | 0.1 - 0.35 | — |
| [SWCH8A](/hi/सामग्री/jis/swch8a "SWCH8A") | — | — | — | — | — | — | — |
| [SWRCH8A](/hi/सामग्री/jis/swrch8a "SWRCH8A") | — | max 0.1 | max 0.03 | max 0.035 | max 0.6 | max 0.1 | max 0.2 |
| [SCM418RCH](/hi/सामग्री/jis/scm418rch "SCM418RCH") | — | 0.16 - 0.21 | max 0.03 | max 0.03 | 0.6 - 0.9 | 0.15 - 0.35 | 0.9 - 1.2 |
| [SWRCHB726](/hi/सामग्री/jis/swrchb726 "SWRCHB726") | — | 0.23 - 0.29 | max 0.03 | max 0.03 | 1.2 - 1.5 | 0.1 - 0.35 | — |
| [SWCH16A](/hi/सामग्री/jis/swch16a "SWCH16A") | — | — | — | — | — | — | — |
| [SWRCH18A](/hi/सामग्री/jis/swrch18a "SWRCH18A") | — | 0.15 - 0.2 | max 0.03 | max 0.035 | 0.6 - 0.9 | max 0.1 | max 0.2 |
| [SCM425RCH](/hi/सामग्री/jis/scm425rch "SCM425RCH") | — | 0.23 - 0.28 | max 0.03 | max 0.03 | 0.6 - 0.9 | 0.15 - 0.35 | 0.9 - 1.2 |
| [SWCHB320](/hi/सामग्री/jis/swchb320 "SWCHB320") | — | 0.17 - 0.23 | max 0.03 | max 0.03 | 0.7 - 1 | 0.1 - 0.35 | — |
| [SWCH22A](/hi/सामग्री/jis/swch22a "SWCH22A") | — | — | — | — | — | — | — |
| [SWRCH25A](/hi/सामग्री/jis/swrch25a "SWRCH25A") | — | 0.22 - 0.28 | max 0.03 | max 0.035 | 0.3 - 0.6 | max 0.1 | max 0.2 |
| [SCM435HRCH](/hi/सामग्री/jis/scm435hrch "SCM435HRCH") | — | 0.32 - 0.39 | max 0.03 | max 0.03 | 0.55 - 0.95 | 0.15 - 0.35 | 0.85 - 1.25 |
| [SWCHB420](/hi/सामग्री/jis/swchb420 "SWCHB420") | — | 0.17 - 0.23 | max 0.03 | max 0.03 | 0.8 - 1.1 | 0.1 - 0.35 | — |
| [SWCH15K](/hi/सामग्री/jis/swch15k "SWCH15K") | — | — | — | — | — | — | — |
| [SWRCH16K](/hi/सामग्री/jis/swrch16k "SWRCH16K") | — | 0.13 - 0.18 | max 0.03 | max 0.035 | 0.6 - 0.9 | 0.1 - 0.35 | max 0.2 |
| [SCM445HRCH](/hi/सामग्री/jis/scm445hrch "SCM445HRCH") | — | 0.42 - 0.49 | max 0.03 | max 0.03 | 0.55 - 0.95 | 0.15 - 0.35 | 0.85 - 1.25 |
| [SWCHB726](/hi/सामग्री/jis/swchb726 "SWCHB726") | — | 0.23 - 0.29 | max 0.03 | max 0.03 | 1.2 - 1.5 | 0.1 - 0.35 | — |
| [SWCH20K](/hi/सामग्री/jis/swch20k "SWCH20K") | — | — | — | — | — | — | — |
| [SWRCH22K](/hi/सामग्री/jis/swrch22k "SWRCH22K") | — | 0.18 - 0.23 | max 0.03 | max 0.035 | 0.7 - 1 | 0.1 - 0.35 | max 0.2 |
| [SNC415HRCH](/hi/सामग्री/jis/snc415hrch "SNC415HRCH") | — | 0.11 - 0.18 | max 0.03 | max 0.03 | 0.3 - 0.7 | 0.15 - 0.35 | 0.2 - 0.55 |

 [पिछला](/hi/%E0%A4%B6%E0%A5%8D%E0%A4%B0%E0%A5%87%E0%A4%A3%E0%A4%BF%E0%A4%AF%E0%A4%BE%E0%A4%81/%E0%A4%95%E0%A5%8B%E0%A4%B2%E0%A5%8D%E0%A4%A1-%E0%A4%8F%E0%A4%95%E0%A5%8D%E0%A4%B8%E0%A4%9F%E0%A5%8D%E0%A4%B0%E0%A5%82%E0%A4%9C%E0%A4%BC%E0%A4%A8-%E0%A4%87%E0%A4%B8%E0%A5%8D%E0%A4%AA%E0%A4%BE%E0%A4%A4 "पिछला") पृष्ठ 2 / 4[अगला](/hi/%E0%A4%B6%E0%A5%8D%E0%A4%B0%E0%A5%87%E0%A4%A3%E0%A4%BF%E0%A4%AF%E0%A4%BE%E0%A4%81/%E0%A4%95%E0%A5%8B%E0%A4%B2%E0%A5%8D%E0%A4%A1-%E0%A4%8F%E0%A4%95%E0%A5%8D%E0%A4%B8%E0%A4%9F%E0%A5%8D%E0%A4%B0%E0%A5%82%E0%A4%9C%E0%A4%BC%E0%A4%A8-%E0%A4%87%E0%A4%B8%E0%A5%8D%E0%A4%AA%E0%A4%BE%E0%A4%A4/पृष्ठ/3 "अगला")

## इस श्रेणी को कवर करने वाले मानक

 8

- [**JIS***152 ग्रेड*](/hi/सामग्री/jis "JIS — इस श्रेणी में 152 ग्रेड")
- [**KS***49 ग्रेड*](/hi/सामग्री/ks "KS — इस श्रेणी में 49 ग्रेड")
- [**DIN / EN***6 ग्रेड*](/hi/सामग्री/din-en "DIN / EN — इस श्रेणी में 6 ग्रेड")
- [**UNS***4 ग्रेड*](/hi/सामग्री/uns "UNS — इस श्रेणी में 4 ग्रेड")
- [**AISI / SAE***4 ग्रेड*](/hi/सामग्री/aisi-sae "AISI / SAE — इस श्रेणी में 4 ग्रेड")
- [**GOST***4 ग्रेड*](/hi/सामग्री/gost "GOST — इस श्रेणी में 4 ग्रेड")
- [**GB***3 ग्रेड*](/hi/सामग्री/gb "GB — इस श्रेणी में 3 ग्रेड")
- [**AS / NZS***1 ग्रेड*](/hi/सामग्री/as-nzs "AS / NZS — इस श्रेणी में 1 ग्रेड")

## गुणों की सीमाएँ

 18

| गुण | इकाई | न्यूनतम | अधिकतम | ग्रेड |
|---|---|---|---|---|
| Rm | N/mm² | 290 | 1076 | 48 |
| Re | N/mm² | 225 | 958 | 4 |
| A | % | 17 | 30 | 3 |
| A5 | % | 6 | 30 | 4 |
| Z | % | 30 | 55 | 48 |
| KCU | kJ/m² | 150 | 400 | 1 |
| HB | — | 121 | 255 | 3 |
| HRB | — | 80 | 97 | 37 |
| rho | g/cm³ | 7.549 | 7.9 | 6 |
| E | GPa | 152 | 217 | 4 |
| alpha | 10^-6/K | 11.9 | 15.3 | 3 |
| lambda | W/(m·K) | 26 | 56.1 | 4 |
| cp | J/(kg·K) | 465 | 720 | 3 |
| rho\_el | nΩ·m | 233 | 1156 | 2 |
| Ac1 | °C | 730 | 810 | 4 |
| Ac3 | °C | 755 | 950 | 4 |
| Ar3 | °C | 690 | 840 | 4 |
| Ar1 | °C | 680 | 780 | 4 |

इस श्रेणी में दर्ज मान वाले 48 ग्रेड से लिया गया।

## संघटन की सीमा

 11

| गुण | इकाई | न्यूनतम | अधिकतम | ग्रेड |
|---|---|---|---|---|
| B | % | 0.0008 | 0.0008 | 24 |
| C | % | 0.08 | 0.53 | 118 |
| Al | % | 0.02 | 0.02 | 10 |
| Si | % | 0.1 | 0.4 | 112 |
| P | % | 0.025 | 0.04 | 118 |
| S | % | 0.025 | 0.04 | 118 |
| Cr | % | 0.2 | 1.8 | 90 |
| Mn | % | 0.3 | 1.7 | 118 |
| Ni | % | 0.2 | 3.5 | 88 |
| Cu | % | 0.25 | 0.3 | 92 |
| Mo | % | 0.15 | 0.6 | 25 |

इस श्रेणी में दर्ज मान वाले 118 ग्रेड से लिया गया।