Standard:DIN2391,EN10305,JISG3445,ASTMA519,GB3639,16Mn,27SiMn,25Mn,SAE1026
Material:ST45，ST52，20 #，45#，CK45，16Mn,27SiMn,25Mn,SAE1026
Delivery condition:BKS
Outer diameter:50-300mm
Inner diameter:40-250mm
I.D. Tolerance:H8~H9
Length:3-9m
Straightness:1/1000
I.D. roughness:RAÂ 0.4micron(max)
Technology:Honed & SRB(SKIVED AND ROLLER BURNISHED )
Chemical Composition(%)
Steel Grade | C | Si | Mn | P(≦) | S(≦) | Cr(≦) |
ST45 | 0.17-0.24 | 0.17-0.37 | 0.35-0.65 | 0.035 | 0.035 | 0.250 |
ST52(E355) | ≦0.22 | ≦0.55 | ≦1.6 | 0.025 | 0.025 | 0.250 |
SAE1026 | 0.22-0.28 | 0.15-0.35 | 0.60-0.90 | 0.040 | 0.050 | / |
27SiMn | 0.24-0.32 | 1.10-1.40 | 1.10-1.40 | 0.035 | 0.035 | 0.300 |
20# | 0.17-0.24 | 0.17-0.37 | 0.35-0.65 | 0.035 | 0.035 | 0.250 |
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Mechanical Properties
Delivery condition:BKS Cold Drawn&Stress-Relieved
Steel Grade | Rm MPa(≥) | ReH MPa(≥) | Elongation A5(%)(≥) |
ST45 | 520 | 375 | 15 |
ST52(E355) | 600 | 520 | 14 |
SAE1026 | 600 | 510 | 15 |
16Mn | 600 | 520 | 14 |
20# | 520 | 375 | 15 |
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