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Round Spring Forged Steel Bar ASTM 6150 EN 51CrV4 1.8159 High Performance

China SHANGHAI UNITE STEEL certification
China SHANGHAI UNITE STEEL certification
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Round Spring Forged Steel Bar ASTM 6150 EN 51CrV4 1.8159 High Performance

Round Spring Forged Steel Bar ASTM 6150 EN 51CrV4 1.8159 High Performance
Round Spring Forged Steel Bar ASTM 6150 EN 51CrV4 1.8159 High Performance Round Spring Forged Steel Bar ASTM 6150 EN 51CrV4 1.8159 High Performance

Large Image :  Round Spring Forged Steel Bar ASTM 6150 EN 51CrV4 1.8159 High Performance

Product Details:
Place of Origin: MAINLAND CHINA
Brand Name: UST
Certification: ISO 9001:2008
Model Number: ASTM 6150
Payment & Shipping Terms:
Minimum Order Quantity: 3 Metric tons
Price: USD 800-2000 / Metric Ton
Packaging Details: In standard export packing and seaworthy material with rectangular shape bundle, covered with tarpaulin, in ontainers or in bulk, or upon request
Delivery Time: 15-35 days
Payment Terms: L/C, T/T, D/A, D/P
Supply Ability: 1000 Metric Tons per Month
Detailed Product Description
Matrial: Spring Steel Standard: GB, ASTM, DIN,JIS
Grade: 6150 / 51CrV4 1.8159 Diameter: 4-1600mm
Length: Below 16 Meters Shape: Round Bar
Techniques: Cold Drawn; Hot Rolled; Cold Rolled; Forged Surface: Black, Bright, Polished, Peeled, Or Upon Request
Ultrasonic Test: 100% UT Passed Processing: Annealed Or Quenched And Tempered Provided
End: Beveled, Plain End As Required Quality Inspection: SGS, BV Etc.
Service: Cutting Service And 3rd Party Inspection Is Provided
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Forged Round Bar


Forged Steel Bars


Forged Steel Round Bars

ASTM 6150 EN 51CrV4 1.8159 Spring Steel Bar /Rod Forged Dia 130-1600mm




AISI 6150 steel is chromium vanadium type spring steel. It’s a similar alloy steel to 5150 steel with small, but effective, vanadium addition, to import greater hardness. AISI steel 6150 has low distortion properties and is easily heat treated. The SAE 6150 steel grade is suitable for oil hardening and tempering.

ASTM 6150 steel is usually supplied in the as rolled condition. When used in the oil hardened and tempered condition SAE 6150 spring steel combines spring characteristics with excellent resistance to both abrasion and shock. Hardened 6150 steel offers excellent toughness and shock resistance which make it a suitable alloy spring steel for parts exposed to stress, vibration and shock.




It’s commonly used in heavily stressed machinery parts including shafts, gears, pinions and also in hand tool components. ASTM 6150 steel is also widely in the motor vehicle industry AISI 6150 is suitable for many general engineering applications that require high tensile strength and toughness.





- Dimension: Diameter 4-1600 mm, any length below 16 meters

- Delivery Conditions:

Cold drawn: 4-100 mm

Peeled: 30-160 mm

Grinded: 4- 600 mm

Turned: 130-1200 mm

Hot rolled: 12-320 mm

Hot forged: 130-1600 mm


- HOT rolled; Cold rolled; Forged; Cold Drawn

- Heat Treatment: Untreated, Annealing, N+T, Q+T

- Smelting: EAF+LF+VD (+ESR)

- Surface Finish: Black, Rough Machined, Peeled, Turned or upon request

- UT 100% passed

- Cutting service provided

- Third Party inspection is acceptable (SGS, BV etc.)


Round Spring Forged Steel Bar ASTM 6150 EN 51CrV4 1.8159 High Performance 0


AISI Steel 6150 Specification and Relevant Standards


Country USA BS Japan China
Standard ASTM A29 EN 10083 JIS G4801 GB/T 3077
Grades 6150 1.8159/51CrV4 SUP 10 50CrVA



ASTM 6150 Steels & Equivalents Chemical Composition


Standard Grade C Mn P S Si Cr V
ASTM A29 6150 0.48-0.53 0.70-0.90 0.035 0.040 0.15-0.35 0.80-1.10 0.15
EN 10083 1.8159
0.47-0.55 0.70-1.10 0.025 0.025 0.40 0.90-1.20 0.10-0.25
JIS G4801 SUP 10 0.47-0.55 0.65-0.95 0.030 0.030 0.15-0.35 0.80-1.10 0.15-0.25
GB/T 3077 50CrVA 0.47-0.54 0.50-0.80 0.030 0.030 0.17-0.37 0.80-1.10 0.10-0.20


AISI/SAE 6150 Steel Mechanical Properties


Properties Conditions
T (°C) Treatment
Density (×1000 kg/m3) 7.7-8.03 25  
Poisson’s Ratio 0.27-0.30 25  
Elastic Modulus (GPa) 190-210 25  
Tensile Strength (Mpa) 667.4 25 annealed at 815℃
Yield Strength (Mpa) 412.3
Elongation (%) 23.0
Reduction in Area (%) 48.4
Hardness (HB) 197 25 annealed at 815℃
Impact Strength (J) 27.4 25 annealed at 815℃




Forging of Material AISI 6150 Steel


AISI 6150 alloy steel could be forged between 2150 and 1600ºF (1175 and 870ºC.) The alloy should be slow cooled after forging or transferred to a furnace around the ‘finishing’ temperature. Do not forge below 840°C


ASTM 6150 Steel Heat Treatment

  • Preheat:

1200-1250F (650-675ºC), equalize.

  • Annealing:

1100-1300F (595-740ºC), hold 2 hours, air cool. As with 5150 alloy, the microstructure for this 6150 alloy steel to give optimum machinability is one of coarse lamellar pearlite to coarse spheroidite.

  • Normalizing:

A nominal normalizing temperature for the 6150 spring steel is 1650ºF (900ºC.) This treatment is followed by air cooling.

  • Straightening:

Best done warm 400-800F (205-425ºC).

  • High Heat:

1550-1650F (845-900ºC), soak 10 to 30 minutes. For vacuum hardening, use the high side of the high heat range and soak times.

  • Quenching:

Oil quench to hand warm, 150F (65ºC). Temper SAE 6150 steel immediately. Note vacuum furnaces must have oil quench capability.

  • Tempering:

Tempering at 400-1200 (205-650ºC) for 1 hour per inch (25mm) of thickness at temperature is recommended. (2 hours min.). Air cool to room temperature. Tempering of the AISI 6150 grade steel will be between 400-600°C for most applications.


Machinability of SAE 6150 Steel

The 6150 alloy steel is readily machined from a coarse pearlite to a coarse spheroidite microstructure. The machinability rating of 6150 alloy steel is 59.


Welding of 6150 Materials

AISI 6150 spring steel can be welded, however, preheating and post weld stress relieving have to be performed for welding this steel.

Welding of AISI 6150 alloy steel should be carried out in the annealed condition, not on hardened and tempered material.

Round Spring Forged Steel Bar ASTM 6150 EN 51CrV4 1.8159 High Performance 1


What we can offer?

-We offer a wide range of steel products in a wide variety of dimensions and executions, according to the common international specifications or customize.

-Machining and heat treatment are available.

-Also, we advise you in choosing the right materials.


Shape Available

  • Solid round bar
  • Flat bar
  • Square bar
  • Hexagon bar
  • Block
  • Plate
  • Sheet
  • Wire rod
  • Strip


Our Advantages

  • High mechanical property and quenching, enable the surface share equal hardness after deal with it
  • Good polishing and low roughness
  • Making the heat-treatment to harden condition before using it
  • Competitive price
  • Fast production lead-time
  • All the material are inspected with 3 times to meet the highly standards
  • Pure steel quality & stable quality to be guarantee



Round Spring Forged Steel Bar ASTM 6150 EN 51CrV4 1.8159 High Performance 2



Available Size:
-Round: Dia. 4-1600 mm
-Flat: T. 10-120 mm x W. 60-810 mm
-Block: T. 80-1200 mm x W. 100-1600 mm




1. Both T/T and L/C will be acceptable

2. Trade Terms: FOB, CIF, CFR

3. The delivery will be in 10-15 days if have stock; For customized items, the delivery will be negotiated by both parties

4. Shipping by sea freight from Shanghai Port (PRC) for Bulk orders, by airfreight or express for samples




Shanghai Unite Steel Trading Co., Ltd

We are committed to integrate engineering steel resources in china and serve the global engineering steel market. Our company has more than 15 years of experience in steel researching, production, managing and sales. And our team mostly are based on and worked in national famous steel enterprise.

In the aspect of resources and information, we have established cooperative and stronger relationship with nearly hundred enterprises, either state-owned or private owned in china.

What’s more, we have built long, deep and close business relationship with dozens of steel company, Sharing and holding equities with several steel enterprises. Because of the close cooperation with steel companies and our pioneering spirit, which can ensure us stay at the top competition, and ensure our customers get what they really want!




Q: Are you a manufacturer or merely a trader?
A: We are group of companies and owned manufacturer bases and trading company. We specialized in special steel which include alloy structural steel and carbon steel and stainless steel, etc. All material are with high quality and competitive price.

Q: How do you guarantee the quality of your product?
A: Firstly, we can provide the certificates from the third party, such as TUV, CE, 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.

Q: Delivery time?
A: We have ready stock for most of material grades in our warehouse. If the material doesn't have stock, the delivery lead time is about 5-30 days after receiving your prepayment or firm order.

Q: What is the payment term?
A: T/T or L/C.

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.



Contact Details

Contact Person: Anndy

Tel: +8615502127172

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