scm420h 20CrMo 18CrMo4 alloy steel round bar
1. Specification: SCM420H
2. Application: Automobile Components
3. Production Line: EAF(EBT) → LF → VD → Continuous Casting → Hot Rolled
4. Steel Grades in different standards:
| GB | JIS | DIN | ASTM/AISI/SAE |
| 20CrMoH | SCM420H | 18CrMo4H | 4120H |
5. Chemical composition:
| C | SI | MN | S | P | CR | MO |
| 0.17-0.23 | 0.17-0.37 | 0.55-0.90 | 0.03 (max) | 0.03 (max) | 0.85-1.25 | 0.15-0.35 |
6. Delivery condition and Dimensions:
| Hot Rolled | 16mm to 260mm |
| Cold Drawn | 8mm to 100mm |
| Peeled/Turned | 14mm to 120mm |
7. Dimension Tolerances:
| DIA | 7-20 | 20-30 | 30-50 | 50-80 | 80-110 | 110-150 | 150-190 | 190-250 |
| MM | +0.35
-0.35 | +0.40
-0.40 | +0.50
-0.50 | +0.70
-0.70 | +1.0
-1.0 | +1.3
-1.3 | +2.0
-2.0 | +2.5
-2.5 |
8. Gas Contents:
| Oxygen | Nitrogen | Hydrogen |
| 20ppm(max) | 90ppm(max) | 2ppm(max) |
9. Inclusion Rating:
| A | B | C | D |
| MAX | MAX | MAX | MAX |
| Thin | 2.0 | 2.0 | 2.0 | 2.0 |
| Thick | 1.0 | 1.0 | v | 1.0 |
10. Hardenability Test:
| J2.5 | J4.8 | J12.7 |
| 41/47HRC | 35/43HRC | 24/32HRC |
11. Hardness: 250HB
12. Grain Size: 5 to 8
13. Length: The ends will be saw cut, not flame or gas cut. The ends will be from burrs and slag lumps. Length can be customized according to customers' demands.
14. Straightness: 3mm/m(max)
15. Processing:
Surface Treatment: Peeling, Turning, Grinding, Milling, Drilling, Boring
Heat Treatment: Normalizing, Annealing, Quenching+ Tempering
16. Markings: Material, Dimension, Heat No.
17. Quality tests: Spectral Tested, Microstructure Tested, Macrostructure Test, Joming Hardness Test, Upsetting Test
18. Packing:
*Bars from different heats will not be mixed and dispatched.
*Bars will be bundles and securely metal strapped in 3 min places of the bar length and tagged properly.
*For further processing products such as cold drawn/peeled or heat treated goods, plastics bag wrapped or pallet loading is available according to customer's demands.
Qingdao Helio Steel Co., Ltd. Was established in March19, 2012. Our company's business staff members possess professional service capabilities of steel products, with more than a decade of experience on steel production, technology development, product sales and foreign trade. We comply the principle of friendly cooperation and mutual benefit, and persist in developing together with new and old customers.
Our company is located in Qingdao, a coastal city of Shandong Province, which is near Laiwu Steel Group. Only Laiwu City has steel production capacity of 20 million tons each year. Meanwhile, it is also the largest production base of powder metallurgy products in the whole country. Otherwise, there are more than ten well-known steel manufacturers within the province and the surrounding areas, so steel resources here is abundant and we can meet customers' various requirements.
Our company is mainly engaged in steel products for various specifications and materials, such as continuous casting billets, continuous casting tubes, hot-rolled bars, tubes, hot-rolled square steel, flat steel, H section steel, hot-rolled coils, cold-roll large-size panels, forging materials, and forgings.
We also run the import and export of steel products, based on the needs of customers at home and abroad to develop a variety of special steel products and timely delivery. I hope to sincerely cooperate with domestic and foreign customers, providing high-quality and low-priced products and professional services.
