Model Number: hot rolled round bar -5 Key Specifications/Special Features: Hot rolled alloy steel AISI 8620Description:8620 is a low nickel-chromium-molybdenum medium hardenability, case hardening (carburizing) steel, generally supplied in the as rolled condition with a maximum brinell hardness of 280 (Rc30)Characterized by good core strength and toughness in small to medium sections with case hardness up to Rc62 when carburized, hardened and tempered8620 can also be used (uncarburised) as a high tensile steel, which when suitably hardened and tempered can be utilized for various applications requiring good tensile strength and reasonable toughnessPre hardened and tempered (uncarburized) 8620 can be further surface hardened by nitriding but will not respond satisfactorily to flame or induction hardening due to its low carbon content8620 (carburized) is used extensively by all industry sectors for light to medium stressed components and shafts requiring high surface wear resistance with reasonable core strength and impact properties

Applications:

1. AISI 8620 is a common, carburizing alloy steel used for a variety of medium-strength applications including gears, camshafts, fasteners, and chains/chain pins
2. Flexibility in hardening treatments allow optimization of case/core properties
3. Typical uses are: arbors, bearings, bushings, cam shafts, differential pinions, guide pins, king pins, pistons pins, splined shafts, ratchets and sleeves

Related specifications:

1. Australia AS 1444-1996-8620/8620H
2. Germany W.Nr 1.6523 DIN 21NiCrMo2
3. Great Britain BS970: PART 3: 1991 805 M20
4. BS970: 1955-EN 362
5. Japan JISG 4052 SNCM 220H
6. JIS SNCM 21, JIS SNCM 21 H
7. USA SAE 8620 AISI 8620
8. ASTM A29/A29M 1991 8620
9. UNS G86200
10. AMS 6274, AMS 6274G, AMS 6276, AMS 6276C, AMS 6277, AMS 6277A
11. ASTM A322, ASTM A331, ASTM A505, ASTM A513
12. MIL SPEC MIL-S-16974
13. SAE J404, SAE J770
14. UNS G86200
15. France: AFNOR 20 NCD 2, AFNOR 22 NCD 2
16. Italy: UNI 20 NiCrMo 2

Chemical composition(%):

1. Carbon 0.17-0.23
2. Silicon 0.10-0.40
3. Manganese 0.60-0.95
4. Nickel 0.35-0.75
5. Chromium 0.35-0.75
6. Molybdenum 0.15-0.25
7. Phosphorous 0.04 maximum
8. Sulphur 0.04 maximum
9. Process:EAF+LF+VOD+rolled+heat treatment(optional)

Size range:

1. Diameter: 10-320mm
2. Length: as your requests

Surface finishes: black, peeled (K12), cold drawn, turned and polished (H10, H11), precision ground (H9 and H8)

Test:ultrasonic test according