30CrNiMo8/1.6580 Alloy Steel
EN 10083-3: 2006 Steels for quenching and tempering. Technical delivery conditions for alloy steels
EN 10269: 1999 Steels and nickel alloys for fasteners with specified elevated and/or low temperature properties
EN 10250-3:2000 Open steel die forgings for general engineering purposes Alloy special steels
Chemical Composition
| Standard | Grade | C | Si | Mn | P | S | Cr |
| EN10083 | 30CrNiMo8/1.6580 | 0.26-0.34 | ≤0.4 | 0.5-0.8 | ≤0.025 | ≤0.035 | 1.8-2.2 |
| EN10250 | 0.26-0.34 | ≤0.4 | 0.3-0.6 | ≤0.035 | ≤0.035 | 1.8-2.2 |
Equivalent Grades of Steel 30CrNiMo8(1.6580)
| EU | Germany | Japan | France | England | China | Russia | Inter |
| EN | DIN,WNr | JIS | AFNOR | BS | GB | GOST | ISO |
| 30CrNiMo8 | 30CrNiMo8 | SNCM431 | 30CND8 | 823M30 | 30Cr2Ni2Mo | 3KH3M3F | 31CrNiMo8 |
Description of Steel 30CrNiMo8(1.6580)
30CrNiMo8 is a heat treatable steel and usually supplied with quenched and tempered condition or Q & T condition and with a tensile strength of 1100 -1300 N/mm². 30CrNiMo8 steel is used for automotive and general components which requires high demands on strength and toughness and good hardenability.It is especially suitable for heavy duty parts in the aviation, automotive and military industries.
Size Tolerance
| Surface Finish | Size Tolerance | Length |
| Black For Forged condition | (0，+5 ~ +8mm) | Multiple Length/Fixed Length |
| Black For Rolled condition | (0，+1mm) | |
| Rough Turned | (0，+3mm) |
Mechanical properties of Steel 30CrNiMo8(1.6580)
| Property | 160mm < tR ≤ 330mm | 330mm < tR ≤ 660mm |
|---|---|---|
| Tensile Strength | min. 850 N/mm² | min. 800 N/mm² |
| Yield Strength | min. 630 N/mm² | min. 590 N/mm² |
| Elongation | min. 12% (l) | min. 12% (l) |
| Kv-Impact value | min. 45J (l) | min. 40J (l) |
Note: tR refers to the thickness range.
Heat Treatment Conditions
+A Soft annealed/Soft annealing
+N Normalized/Normalizing
+QT Quenched and Tempered
+U Untreated
+SR Stress Relieved
Normalizing:870℃-880℃,Cool in air
Soft Annealing:650℃-700℃,Cooling 10℃ per hour in furnace,max. 248 HB
Stress Relieving:50°C under the temperature of tempering
Hardening:830 – 860°C,oil or polymer,840-850°C,water
Tempering:540°C – 660°C, cool in still air
Drawn and hot-rolled bars, flat bars 30CrNiMo8, 1.6580
Forgings and forged bars in grade 30CrNiMo8, 1.6580
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