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SUP9 SUP9A SUP10 Hot rolled spring sterel round bar
1.Main grade:SUP9 SUP9A SUP10 SUP11 SAE5160 38Si7 55Cr3 50CrV4 50CrVA 60CrMn 60Si2Mn
2.Chemical composition:
Grade | C | Si | Mn | Cr | P | S | Cr |
SUP9 | 0.52-0.60 | 0.15-0.35 | 0.65-0.95 | 0.65-0.95 | Max 0.030 | Max0.030 | -- |
SUP9A | 0.56-0.64 | 0.15-0.30 | 0.70-1.00 | 0.70-1.00 | Max 0.030 | Max0.030 | -- |
SUP10 | 0.47-0.55 | 0.15-0.35 | 0.65-0.95 | 0.70-1.00 | Max 0.030 | Max0.030 | -- |
SAE5160 | 0.56-0.64 | 0.15-0.35 | 0.75-1.00 | 0.70-0.90 | Max 0.030 | Max0.030 | -- |
38Si7 | 0.35-0.42 | 1.50-1.80 | 0.50-0.80 | -- | Max 0.030 | Max0.030 | -- |
55Cr3 | 0.52-0.59 | 0.25-0.50 | 0.70-1.00 | 0.70-1.00 | Max 0.030 | Max0.030 | -- |
50CrV4 | 0.47-0.55 | Max 0.40 | 0.70-1.10 | 0.90-1.20 | Max 0.030 | Max0.030 | 0.10-0.25 |
3.Main standard
DIN17221,DIN EN10132-4, ASTM A322,JIS G4801
4.Quality Control Process
1)Production Line
Blast Furnace Melton Iron → EAF(EBT/BOV) → LF → VD → Molten Steel → Continuous Casting → Hot Rolling(KOCKS) → Further Processing
(Cold Drawn/Peeling/Turning) (as customer’s option)
2)Gas Contents:
Oxygen | Nitrogen | Hydrogen |
20ppm(max) | 90ppm(max) | 2ppm(max) |
3)Macrostructure
As per ASTM E 381 Plate,steel shae be better than C2,RTR2,S2
1)Microstructure
Microstructure of any sample from steel bars:shall be of uniform freeite and pearlite with good machinability.
Microstructure shall be of free from undesirable bandings of freote and pearlite.
Crain size of as per ASTM E112 shall be of 5~8.
5.Avaiable size
Hot rolled round bars | 16mm to 120mm |
Cold drawn bars | 14mm to 60mm |
6.Supply condition Surface Treatment: Polishing,Peeling, Turning, Grinding, Milling, Drilling, Boring
Heat Treatment: Normalizing, Annealing, Quenching+ Tempering
7.Straightness: 3mm/m(max)
8.Packaging:seaworthy packaging by wire rod,every bunled is about 3-5MT,or as customer’s request,each end of the bar has to be machine cut
9.our service
Contacts person:Ms.Sunny Sun
WECHAT:361325226
S-kype:sunny88962
WHATSAPP/CELL:86 13963407991
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