Auto Parts Alloy Steel with 1.2379 Cold Working Tool Steel Plate Metal Sheet Pipe High Carbide

• Type: Sheet
• Standard: AISI, ASTM, DIN, JIS, GB, BS
• Composition: Check Detailed Description
• Technique: Forged
• Shape: Plate
• Surface Treatment: Black, Machined
• Model NO.: Cr12MoV
• Special Use: High-strength Steel Plate, Wear Resistant Steel, Silicon Steel, Cold Heading Steel, Free Cutting Steel, Mold Steel
• Application: Tool Steel Bar
• Transport Package: Nude Packing
• Specification: check detailed description
• Trademark: Ningbo Ningshing
• Origin: China

Product Description

Round Bar/ Block/ Flat Bar/ SKD11/ D2/ 1.2379/ Gbcr12MOV Cr12MOV/ Tool Steel

GBCr12MoV Tool Steel, Economic Grade of 1.2379, D2, SKD11

GBCr12MoV Tool Steel is widely used in China for making High-duty cutting tools (dies and punches), blanking and punching tools. It is the economic grade of Compared with 1.2379, D2 and SKD11, with the lower content of Mo and V.

We keep big stock of GBCr12MoV rounds and flats.

Dimensions
Round: dia.10-700 mm
Flat: 6-120 x 40-1000 mm
Block: 80-400 x 100-1000 mm

Delivery Condition
EAF+(ESR) or EAF+LF+VD+(ESR), Hot rolled or Forged, Annealed, Black surface or Machined surface, UT SEP1921 Class3 D/d

Equivalence

AISI / SAE	DIN / W.Nr	JIS	GB
D2	1.2379	SKD11	Cr12Mo1V1

Chemical Composition(%)

Steel Grade	C	Si	Mn	P	S	Cr	Mo	V
Cr12MoV	1.45-1.70	≤ 0.40	≤ 0.40	≤ 0.030	≤ 0.030	11.00-12.50	0.40-0.60	0.15-0.30
1.2379	1.45-1.60	0.10-0.60	0.20-0.60	≤ 0.030	≤ 0.030	11.00-13.00	0.70-1.00	0.70-1.00
D2	1.40-1.60	0.10-0.60	0.20-0.60	≤ 0.030	≤ 0.030	11.00-13.00	0.70-1.20	0.50-1.10
SKD11	1.40-1.60	≤ 0.40	≤ 0.60	≤ 0.030	≤ 0.030	11.00-13.00	0.80-1.20	0.20-0.50

Applications
High-duty cutting tools (dies and punches), blanking and punching tools, wood working tools, shear blades for cutting light-gauge material, thread rolling tools, tools for drawing, deep drawing and cold extrusion, pressing tools for the ceramics and pharmaceutical industries, cold rools (working rolls) for multiple-roll stands, measuring instruments and gauges, small moulds for the plastics industry where excellent wear resistance is required.

Forging Technique

Heat Temperature	Start Forging Temperature	Finish Forging Temperature	Cooling Method
1120 - 1140 °C	1080 - 1100 °C	880 - 920 °C	Slow Cooling

Heat Treatment

Annealing
800 to 850°C
Slow controlled cooling in furnace at a rate of 10 to 20°C/hr down to approx. 600°C, further cooling in air. Hardness after annealing: max. 250 HB.

Stress relieving
650 to 700°C
Slow cooling in furnace; intended to relieve stresses set up by extensive machining, or in complex shapes. After through heating, hold in neutral atmosphere for 1-2 hours.

Hardening
980 to 1010°C
Oil, salt bath (220 to 250°C or 500 to 550°C), air blast, still air. Tools of intricate shape or with sharp edges should preferably be hardened in air or salt bath. Holding time after temperature equalization: 15 to 30 minutes.
Obtainable hardness: 63 - 65 HRC

Tempering
Slow heating to tempering temperature immediately after hardening/time in furnace 1 hour for each 20 mm of workpiece thickness but at least 2 hours/cooling in air.
For certain cases we recommend to reduce tempering temperature and increase holding time

 

Q1: What is Ningbo Ningshing Precision Machinery Group Co., Ltd ?
A1: Ningbo Ningshing Precision Machinery Group Co., Ltd., formerly known as Ningbo Ningshing Special-Steel Group Co., Ltd., is the leading distributor of Special Steel, and also a professional mold base maker in China. Our business involves special steel trading, machining processing, mold base making, heat treatment, CNC machines manufacturing.


Q2: Are you a manufacturer or a trader? 
A2: For Special Steel, we are the one of the leading distributors and service center in China. 9 warehouses with over 50,000 tons of regular stock. Our workshop has various kinds of equipments for sawing, milling, grinding, drilling etc.
For mold base, we are a professional manufacturer, with 24 sets of CNC machines, 3 axis and 5 axis, CMM for inspection. We produce medium-large sized mold base for plastic injection mold and die casting die.


Q3: How do you control the quality of steels?
A3: Firstly, we have very close and deep relationship with Chinese Prime Mills, choose supplier carefully, and regard them as the long term business partner. Based on the long term cooperation, we concentrate on special steel business and expand the market step by step. Secondly, we have own technical center which is formed by the experienced engineers and technicians whom ever worked for prime mills. We control the quality in production process, in-out warehouse.


Q4:: Which kind of processing can you do?
A4: We do machining processing like cutting, milling, grinding, turning, peeling, drilling, CNC machining. Meanwhile, we do vacuum heat treatment for die and mold.