420 ( 420 )
| Darajasi: | 420 |
| Tasnifi: | Zanglamaydigan va issiqlikka chidamli po'latni payvandlash uchun qotishma. B turi (qotishma turiga ko'ra tasnifi) |
| Standart: | EN ISO 14343: 2009 Payvandlash materiallari. Zanglamaydigan va issiqlikka chidamli po'latlarni boshq payvandlash uchun simli elektrodlar, tarmoqli elektrodlar, simlar va novdalar. |
| Ekvivalent baholar: | Ma'lumot yo'q |
Kimyoviy tarkibi % 420 ( 420 ) sinf
| C | Si | Mn | Ni | P | S | Cr | Mo | Cu |
| 0.25 - 0.4 | maksimal 0.5 | maksimal 0.6 | maksimal 0.75 | maksimal 0.03 | maksimal 0.03 | 12 - 14 | maksimal 0.75 | maksimal 0.75 |
420-sinfning mexanik xususiyatlari (420)
| Rm- tortishish kuchi (MPa) | 450 |
| Rp0.20.2% isbot kuchi (MPa) | 250 |
| A- min. sinish cho'zilishi (%) | 15 |
Mexanik xususiyatlar
| ReH | Minimal rentabellik kuchi / Mindestwert der oberen Streckgrenze / Limite d elasticite minimale |
| Rm | Kuchlanish kuchi / Zugfestigkeit / Qarshilik a la tortishish |
| A | Minimal cho'zilish / Mindestwert der Bruchdehnung / Allongement minimal |
| J | Notch zarbasi testi / Kerbschlagbiegeversuch / Essai de fleksiyon par choc |
