SKD11 Die Steel Sheet Plate with a High-Wear-Resistant

• Type: Steel Plate
• Standard: ASTM, AISI, GB, JIS, DIN, BS
• Certification: ISO
• Surface Treatment: Grinded, Peeled, Polished, Rough Turned
• Technique: Hot Rolled, Forged
• Application: Mold & Dies
• Model NO.: SKD11
• Special Use: Cutting Tools, Measuring Tools, High-strength Steel Plate
• Stock: Stock
• Size Range: Diameter: 20-480mm
• Delivery Condition: Annealed, Qunched and Tempered
• Shape: Round, Square, Flat
• MOQ: 1000kgs
• Sample: Provided
• Transport Package: in Seaworthy Packing
• Specification: 1.2379, AISI D2
• Trademark: Bozhong
• Origin: China
• Production Capacity: 5000tons/Month

Product Description

SKD11 Die Steel Sheet Plate with a high-wear-resistant and tough general-purpose cold-work die steel  

Description

1)SKD11 is a high-wear-resistant and tough general-purpose cold-work die steel, high-carbon high-chromium alloy tool steel and vacuum degassed refined steel. The steel is pure, with good hardenability and small hardening deformation. The steel is softened by spheroidizing annealing, and the workability is good. The carbide particles are fine and uniform. There is no need to worry about the special addition of quenching and cracking strengthening elements molybdenum and vanadium.

2)Features

SKD11 is produced by both Hitachi and Datong steel mills. The Hitachi-produced SKD11 trade name is SLD (the latest improved version is called SLD-MAGIC), and the Datong steel plant trade name is DC11. Both have plants in the mainland, the most well-known in the industry, and the highest prices. The steel is an air-cooled hardened cold-work die steel widely used in the world. Smelted by electric furnace and re-dissolved by electroslag, high purity, better toughness, uniform structure, good high temperature strength, toughness and high temperature fatigue resistance, can withstand sudden temperature changes

High hardness and high wear resistance eutectic carbide is uniform, good toughness, not easy to crack, hardness after quenching> 62HRC. The nitriding treatment time at 525 ºC is 20h / 30h / 60h, the depth of the ammoniated layer is 0.25mm / 0.30mm / 0.35mm, the surface hardness of the part is 1250HV; the nitriding treatment time at 570 ºC is 2h, and the depth of the nitride layer is 10 ~ 20μm, the surface hardness of parts is 950HV.


3)chemical composition
C carbon 1.4 ~ 1.6

Si silicon ≤0.40

Mn Manganese ≤0.60

P phosphorus≤0.030

S sulfur≤0.030

Cr Chrome 11.0-13.0

Mo molybdenum 0.80-1.20

Ni nickel≤0.50

V vanadium 0.20-0.50

Cu copper ≤0.25


4)characteristic
1. High temperature strength and toughness, better wear resistance, easy to cut;

2. SKD11 is a cold die steel with good strength, toughness and heat resistance balance. In recent years, with the development of isotropic products, it has increasingly developed into high toughness and other aspects. It is more stable, easy to process, and less deformed by heat treatment.

Folding product features
Vacuum degassing refining is performed, so the internal quality is extremely clean.

 Good machinability.

Good hardenability, can be hardened by air cooling, without worrying about quenching cracking.

 The heat treatment deformation is very small, the quenching deviation is very small, and it is most suitable for molds with precision requirements.

 Excellent abrasion resistance, it is most suitable for punching die of rust steel or high hardness material.

 Good toughness.

Folded cryogenic treatment
In order to obtain the highest hardness and dimensional stability, the mold is immediately cryogenically cooled from -70 degrees Celsius to -80 degrees Celsius for 3-4 hours after quenching, and then tempered. The hardness of the tool or mold after cryogenic treatment is higher than that of conventional heat treatment -3HRC. Cryogenic treatment of parts with complex shapes and large dimensional changes may cause cracking.

Folding nitriding
After nitriding the mold or workpiece, a hardened structure with high hardness and certain corrosion resistance is formed on the surface.

Nitriding treatment at 525 ºC

The surface hardness of the workpiece is about 1250HV, and the effect of nitriding time on the infiltration layer is shown in the following table. Nitriding time (hours) 20 30 60 Depth of nitrided layer mm 0.25 0.30 0.35

Soft nitriding treatment at 570 ºC

The surface hardness of the workpiece is about 950HV. Soft nitriding treatment usually takes 2 hours, and the depth of the hardened layer can reach 10-20um. Grinding the mold blank or working at a low temperature tempering state, grinding is prone to grinding cracking. In order to prevent the occurrence of cracks, a small amount of grinding feed should be used for multiple grindings, and at the same time, good water cooling conditions should be added.

Wire-cutting molds with complex shapes or large sizes usually encounter cracking when wire-cutting is used in the end.

In order to prevent cracking, it is recommended to use gas quenching and high temperature tempering treatment to reduce the heat treatment stress, or cavity pre-processing of the mold base.

Folding heat treatment
Quenching: first preheat 700 ~ 750 ºC, and then heat to 1000 ~ 1050 ºC to cool in still air, such as steel with a thickness of 6 inches or more, heat to 980 ~ 1030 ºC to harden in oil is better.

Tempering: heating to 150 ~ 200 ºC, staying at this temperature, and then cooling in still air.

Hardness: above HRC 61.

Annealing: Heat to 800 ~ 850 ºC, stay at this temperature for 1 ~ 3 hours, let it cool gradually in the furnace.

Forging: 1050 ~ 950 ºC.

Quenching and tempering specifications

Quenching temperature 1010 ° C, air cooling. Tempering temperature 200 ° C, hardness 58 ~ 60HRC.
Cold Work Tool Steel DIN 1.2379 / AISI D2

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
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

 
Dimension

Shape	Thick / Dia. (mm)	Width (mm)
Round	8-600	/
Flat	6-200	20-900
Block	150-500	200-1000

 
Delivery Condition
EAF+(ESR) or EAF+LF+VD+(ESR), Hot rolled or Forged, Annealed, Hardness≤255HB,
Unmachined or Machined surface (Peeled, Turned, Milled, Grinded), UT 100% Passed
 
Characteristics
1. With good hardenability and wear resistance.
2. With high oxidation resistance, good corrosion resistance after quenching and polishing, small deformation after heat treatment.
 
Applications
For making different kinds of cold work molds with high accuracy and long service life, cutting tools and measuring instruments, such as complex-shaped piercing dies, threading screw plates, cold extrusion dies, cold cutting scissors, precision measuring tools etc.
 
Forging Technique

Heat Temperature	Start Forging Temperature	Finish Forging Temperature	Cooling Method
1120-1160 °C	1050-1090 °C	≥850 °C	Thermal Annealing

 
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. 255 HB.
 

Stress relieving
650 to 700°C
Slow cooling in furnace; intended to relieve stresses set up by extensive machining, or incomplex shapes. After through heating, hold in neutral atmosphere for 1 to 2 hours.
 
Hardening
1020 to 1040°C
Complex shapes/air, simple shapes/air blast, oil, salt bath from (220 to 250°C or 500 to 550°C). 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 
1hour for each 20 mm of work piece thickness, but at least 2 hours/cooling in air.
For average hardness figures to be obtained, please refer to the tempering chart.
For certain cases we recommend to reduce tempering temperature and increase holding 
time. For certain applications requiring improved retention of hardness, a nitriding treatment is recommended.
 

What we can offer
What we can offer?
 
We offer a wide range of steel products in a wide variety of dimensions and executions, acc.to the common international specifications or customerized.
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

 

	AISI	DIN	JIS	Stock	Application
Hot Work Tool Steel	H11	1.2343	SKD6	√	Die Casting Dies,Extrusion Dies, Hammer Dies, Ram Dies, Forging Dies etc.
	H13	1.2344	SKD61	√
	H10	1.2365	SKD7
	--	1.2367	--
	L6	1.2714 / 1.2713	SKT4	√
	H12	1.2606	SKD62
	H21	1.2581	SKD5	√
Cold Work Tool Steel	D3	1.2080	SKD1	√	Cutting Tools, Punching Tools, Shear Bladers, Reamers, Thread Rolling Dies, Calipers, Sockets etc.
	--	1.2601	~SKD11	√
	D2	1.2379	~SKD11	√
	--	1.2379 MOD	DC53 (Daido)	√
	D6	1.2436	--
	O1	1.2510	SKS3	√
	O2	1.2842	--
	A2	1.2363	SKD12
	S1	1.2550	--
	S7	1.2357	--
	--	1.2767	SKT6
	L2	1.2210	--
Plastic Mould Steel	P20	1.2311	--	√	Mold Base,           Core & Cavity,         Bumper Mold             etc.
	P20+Ni	1.2738	--	√
	P20+S	1.2312	--	√
	--	1.2316	--
	420	1.2083	SUS420J2	√
	--	--	NAK80 (Daido)	√
Alloy Steel	4120	25CrMo4 / 1.7218	SCM420		Shafts, Gears, Drillers, Chains, Bolts, Nuts, Pins, Suds, Keys, Bites, Crankshafts, Connecting Rods, Came, Couplings  etc.
	4135	34CrMo4 / 1.7220	SCM435
	4130	34CrMo4 / 1.7220	SCM430	√
	4140	42CrMo4 /        42CrMoS4 /                1.7225	SCM440	√
	4142	41CrMo4 / 1.7223	SCM440
	4145H	--	--
	4330V	--	--
	4340	34CrNiMo6 / 1.6582	SNCM439
	5115	16MnCr5 / 16MnCrS5 / 1.7131
	5120	20MnCr5 / 20MnCrS5 / 1.7147	SMnC420H
	5140	41Cr4 / 41CrS4 / 1.7035	SCr440	√
	8620	21NiCrMo2 / 1.6523	SNCM220
	8640	40NiCrMo2-2 / 1.6546	SNCM240
	--	18CrNiMo7-6 / 17CrNiMo6 / 1.6587	--
	9840	36CrNiMo4 / 1.6511	--
	E71400	41CrAlMo7-10 / 1.8509	SACM1
	--	34CrAlNi7 / 1.8550	--
Bearing Steel	E52100	100Cr6 / 1.3505	SUJ2	√	Bearing, Shafts etc.
	--	100CrMn6 / 1.3520	--
	--	100CrMo7-3 / 1.3536	--
Spring Steel	5155	55Cr3 / 1.7176	SUP9		Springs
	6150	51CrV4 / 1.8159	SUP10
	9261	60CrSi7 / 1.7108	--
Carbon Steel	1010	CK10 / C10E / 1.1121	S10C		Shafts, Chains, Bolts, Nuts, Pins, Suds, Keys, Bites, Came, Couplings  etc.
	1020	C22 / 1.0402	S20C	√
	1040	CK40 / C40E / 1.1186	S40C	√
	1045	CK45 / C45E / 1.1191	S45C	√
	1050	CK50 / C50E / 1.1206	S50C	√
	1055	CK55 / C55E / 1.1203	S55C
	1064	CK60 / C60E / 1.1221	S58C
High Speed Tool Steel	M2	1.3343	SKH51	√	Reamer,       End-mill,          Hob, Cutter, Bite, Drill, Punch, Tap, Brooch etc.
	M7	1.3348	--
	M42	1.3247	SKH59	√
	M35	1.3243	SKH55	√
	T1	1.3355	SKH2
	T15	1.3202	--
	T42	1.3207	SKH57

Application
Used to make plastic molds, scissors, circular saw blades, metal stamping molds, forming rolls
Make cold or hot work trimming dies, roller edges, wire patterns, line dies, transformer core dies, cutting steel skin cutters, steel tube forming drums, special forming cylinders, nail head dies, etc.
High-efficiency blanking die, punching die and embossing die for thin steel plate with thickness ≤6mm
All kinds of scissors, inlaid parts, thread rolling dies.
Slider-resistant cold heading die, deep drawing forming die, cold extrusion die.
Thermosetting resin type touch, general plastic mold.
Note:
1). √ means we have stoc
2). Delivery Condition:
Smelting: EAF+LF+VD (+ESR)
Making: Hot rolled, Cold rolled, Forged, Cold Drawn
Heat Treatment: Untreated, Annealing, N+T, Q+T
Surface: Black, Peeled, Turned, Milled, Grinded, Polished
 
Packing & Shipping
Hot keywords:High quality tool steel, High quality 1.2379/D2 steel, Tool steel manufacturer, Special steel supplier