S355J2G3 S355J2G4 channel steel
1. product description
The preheating temperature of S355J2G3 steel under different plate thicknesses and different ambient temperatures is shown in the table below.
| Thickness,mm | Preheating temperature at different temperatures |
| <16 | No preheating above -10℃, preheating 100～150℃ below -10℃ |
| 16-24 | No preheating above -5℃, preheating 100～150℃ below -5℃ |
| 25-40 | No preheating above 0℃, preheating 100～150℃ below 0℃ |
| >40 | Preheating 100～150℃ |
Due to the low carbon content of S355J2G3, it is difficult to obtain good hardness by direct quenching.However, good hardness can be obtained by case hardening methods such as carburizing and nitriding.
After carburizing and quenching, the hardness of S355J2G3 steel can usually reach above 40HRC.By nitriding, the surface hardness of S355J2G3 can reach 530-700HV3, Nitration hardness depth 0.2-0.8mm.
Chemical composition(mass fraction)(wt.%) of the S355J2G4
| C(％) | Si(％) | Mn(％) | P(％) | S(％) |
|---|---|---|---|---|
| 0.20 | 0.55 | 1.60 | 0.035 | 0.035 |
Mechanical properties of grade S355J2G4
| Yield Rp0.2 (MPa) |
Tensile Rm (MPa) |
Impact KV (J) |
Elongation A (%) |
Reduction in cross section on fracture Z (%) |
As-Heat-Treated Condition | HBW |
|---|---|---|---|---|---|---|
| 519 (≥) | 414 (≥) | 24 | 34 | 34 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 134 |
2. Products Details
| Product Name | S355J2G3 S355J2G4 channel steel |
| Length |
as your requested |
| Standards | JIS, ASTM, GB, EN,etc. |
| Packing | in bundle,packed with steel belts tightly |
| Surface | Painted;Galvanized;Weld |
| Origin | China |
| Price Term | FOB, CIF, EXW,DDP, etc. |
| Delivery Time | 3-30 days,according to your quantity |
3.Customer Visit:
4.About US：
Gnee Steel Co.,Ltd (GNEE) is the affiliated company for ANGANG GROUP who are one large state-owned iron and steel group located in Henan, China.
GNEE are specialized in manufacturing and supplying large quantities Seamless steel pipes and Shipping-building plates, We are provide high quality steel of Steels and Coils, plates, tool steels,steel pipes and other steel products with guaranteed Grade-A quality, excellent performance and competitive prices.
All of steel products from GNEE have been exported to overseas distributors, warehouses, and factories in USA, Mid-east, Europe, Bangladesh, Sri Lanka, Egypt, Saudi Arabia, and other countries and regions. Therefore, GNEE has got a great market share in the international market.
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