Steel Grade	C	Si	Mn	P	S	Cr
1.2080	1.90 2.20	0.10 0.60	0.20 0.60	≤ 0.030	≤ 0.030	11.00 13.00
D3	2.00 2.35	0.10 0.60	0.20 0.60	≤ 0.030	≤ 0.030	11.00 13.50
Cr12	2.00 2.30	≤ 0.40	≤ 0.40	≤ 0.030	≤ 0.030	11.50 13.00

Dimension

Shape	Thick / Dia. (mm)	Width (mm)
Round	8-500	/
Flat	6-200	20-900
Block	150-500	200-800

Delivery Condition

EAF+(ESR) or EAF+LF+VD+(ESR), Hot rolled or Forged, Annealed, Hardness≤250HB,

Unmachined or Machined surface (Peeled, Turned, Milled, Grinded), UT 100% Passed

Characteristics

1. A kind of cold work tool steel widely used, belonging to Ledeburitic steel with high carbon and high chromium.

2. Quite good hardenability and wearing resistance, and small distortion after quenching.

3. Not good impact toughness, be liable to fracture and form inhomogeneous eutectic carbides.

Applications

1. Common used for making cold work molds of excellent wearing resistance with light shock loads, such as punch heads, cold cutting scissors, drill bushes, gauges, wire drawing sheets, drawing dies, thread rolling dies etc.

2. Making cutting tools which is used for machining material of low hardness.

3. Used as plastic mold with good wearing resistance and long service life.

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

Approx. 650°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

940 to 970°C

Oil, salt bath (220 to 250°C or 500 to 550°C), compressed or still air if thickness does not exceed 25 mm and if hardening temperature is on the upper side of the range. 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 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.

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