1.2311, 40crmnmo7 Plastic Mould Steel Flat Bar

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1.2311, 40crmnmo7 Plastic Mould Steel Flat Bar

Customization:	Available
Technique:	Hot Rolled
Standard:	AISI, JIS, ASTM, DIN, BS, GB

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Product Description

Basic Specifications

Model NO.

1.2311

Certification

ISO

Product Name

1.2311, 40crmnmo7 Plastic Mould Steel Flat Bar

GB Standard

40crmnmo7

Delivery Condition

Hot Rolled, Forged, EAF+LF+VD

Delivery Term

FOB, CIF, CFR, EXW

Shipping

By Sea, Air

Round Bar Size

Dia 12-1000mm

Length

2000-6000mm

DIN Standard

1.2311

Hardness

Max. 241HB (Annealed)

ASTM Standard

P20

Origin

China

Capacity

5000 Tons/Month

Product Description

DIN 1.2311 / 40CrMnMo7 Steel is a high-quality alloy tool steel usually supplied in Quenched & Tempered (QT) condition. Known for its excellent polished finish, it is a premier choice for machine-cut plastic moulds, offering superior wear resistance.

Chemical Composition (%)

C: 0.35-0.45 | Si: 0.20-0.40 | Mn: 1.30-1.60 | P: ≤0.030 | S: ≤0.030 | Cr: 1.80-2.10 | Mo: 0.15-0.25

Equivalent Grades: AISI/ASTM P20; GB 5CrMnMo

Available Forms: Round Bars, Square Bars, Flat Bars, Plates, Blocks.

Technical Specifications

Size Range:

Round Bar: Cold Drawn (1-16mm), Hot Rolled (10-50mm), Hot Forged (50-180mm), Free Forging (180-300mm)
Flat Bar: Thickness 1-300mm; Width up to 800mm
Surface Condition: Black, Peeled, Rough Machined, Ground

Heat Treatment (QT Process)

Heat to 820-850°C uniformly.
Quench in oil.
Withdraw and cool in air.
Temper at 300-400°C based on specific hardness requirements (2 hours per 25mm thickness).

Applications

Ideal for plastic mould production, including die holders, zinc die casting dies, backers, bolsters, and injection moulds. Also suitable for shafts, rails, and wear strips.

Quality Assurance

Comprehensive non-destructive testing (NDT) is performed during production:

RT - Ray Detection
UT - Ultrasonic Testing
MT - Magnetic Particle Testing
PT - Penetration Testing
ET - Eddy Current Flaw Detection

Product Range

Supply of various steel products including:

Steel Coils & Sheets
Steel Plates
Round/Flat/Square Bars

Welded & Seamless Pipes
Steel Beams & Channels
Flanges & Wires

Service Capabilities

We provide advanced processing services based on customer drawings:

Oxygen, Plasma, and Laser Cutting
Ultrasonic testing (EN10160, EN10164 Z15/Z25/Z35)
Weld bending and PWHT detection
Certifications: ISO9001:2000, TUV, LRS, GL, CE

Frequently Asked Questions

What are the primary benefits of 1.2311 steel?

1.2311 (P20) steel offers excellent polishability and high wear resistance, making it perfect for high-precision plastic injection moulds and die casting.

How do you ensure the quality of the steel?

We implement a strict quality control system including Ultrasonic Testing (UT), Magnetic Particle Testing (MT), and can provide third-party certifications such as TUV or CE upon request.

What is the typical delivery time for orders?

For items in stock, delivery is immediate. For custom production or non-stock materials, the lead time generally ranges from 5 to 30 days after order confirmation.

Can I request a sample before placing a bulk order?

Yes, we provide samples for quality approval. Free samples are available for standard sizes if the material is currently in stock.

What processing services do you offer?

We offer comprehensive processing including laser cutting, plasma cutting, oxygen cutting, and specialized surface treatments like grinding and peeling according to your technical drawings.

What are your standard payment terms?

Our standard payment terms are T/T (Telegraphic Transfer) or L/C (Letter of Credit) at sight.