1.7225 SAE4140 EN19 Ultra-high Strength Hot Rolled Alloy Steel Round Bar

• Type: Alloy Steel Bar
• Standard: AISI, ASTM, GB, JIS, DIN, BS
• Technique: Hot Rolled
• Application: Structural Steel Bar, Tool Steel Bar, Die Steel Bar
• Surface Treatment: Polished
• Alloy: Alloy
• Model NO.: 1.7225, SCM440, SAE4140, 42CrMo
• Special Use: Mold Steel
• Diameter: 14-450mm
• Length: 4000-6000mm
• Certificate: Mill certificate
• Test: 100% Ut passed
• Lead time: 7-15 days
• MOQ: 3MT
• Sample: Free
• Steel mill: Bao Steel
• Payment: 30% T/T deposit, balance by L/C at sight
• Heat treatment: Annealing, Q+T
• Hardness: 25-40HRC
• Ut standard: Sep 1921-84 class 3 C/C to D/D
• Production route: EF/EAF+LF+VD/ESR
• Shape: Plate, flat bar, round bar
• Characteristics: Ultra-high strength
• Transport Package: Standard or Customized
• Specification: dia14-450*4000-6000mm
• Trademark: CF Steel
• Origin: China
• HS Code: 7228309900
• Production Capacity: 1000mt/Month

Product Description

Ultra-high Strength Hot Rolled Special Alloy Tool Steel Bar 1.7225 SCM440 SAE4140

Perform Standard: GB/T 3077-1999

1. Chemical Composition (%)

C	Si	Mn	Cr	Mo	P	S	Ni
0.38~0.45	0.17~0.37	0.60~0.90	0.90~1.20	0.15-0.25	≤0.018	≤0.030	≤0.012

2. Mechanical Properties
Tensile strength:σb (MPa):≥1080(110) 
Yield strength:σs (MPa):≥930(95)
Elongation:δ5 (%):≥12
Section shrinkage:ψ (%):≥45
Impact work:Akv (J):≥63
Impact toughness value:αkv (J/cm²):≥78(8)

3. Ready Stock
Round Bar: diameter 14-460mm.
All the sizes as require can be customerized as fresh production with MOQ.

4. Delivery Condition
1) Hot rolled, Heat Treatment,black, hardness or tempered hardness:28-34 HRC.
2) Annealing:HBS<=235.

5. Application
It used for section large forgings, such as locomotive traction gears, with supercharger drive gear, the rear axle, the connecting rod and the spring load greatly clip, oil drill pipe joints and fishing tools, etc.

6. Feature
1) Weldability suffers with increasing chromium content;
2) High temperature strength and high pressure hydrogenation properties are promoted by chromium and molybdenum;
3) Molybdenum significantly reduces temper brittleness;
4) Chromium renders steel oil hardenable and increase hardenability;
5) Chromium molybdenum high tensile steel with yield strength of 550N/mm2;

7. Delivery Time
For abundant stock, 7-15 days.For customized products, 15-30 days.

8. Ultra-high Strength Hot Rolled Special Alloy Tool Steel Bar 1.7225 SCM440 SAE4140 
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9. About Us
Guangzhou ChangFeng Steel Co., Ltd. is a professional special steel company, which specialized in exporting mould steel products based in China.  With more than 20 years experience in special steel industry,  our main products are Plastic Mould Steel, Hot Work Mould Steel, Cold Work Mould Steel, Alloy Structural Steel, Tool Steel, Stainless Steel, Carbon Steel and Forged Block.




10. FAQ
Q: Are you a manufacturer or merely a trader?
A: We are trading company act as exporting Steel Products with our own factory,
we can manufacture the products as in cutomer's requirement,wholesale and retail all kinds of domestic mould steel,the price we offered is very competitive compared with other agents.

Q: How do you guarantee the quality of your product?
A: Firstly, we can provide the certificates from the third party, such as SGS, CE,ISO if you need. Secondly, we have a complete set of inspection system and every process is checked by QC. Quality is the lifeline of enterprise survival. Third,the products we export are mainly from ShaGang group, WenFeng group, XingCheng group, DongTe group,DaYe and so on, the quality are certained.
 
Q: Can we visit your company and factory?
A: Yes, warmly welcome! We can book the hotel for you before you come to China and arrange our driver to our airport to pick you up when you come.