Steel Grade	C	Si	Mn	P	S	Cr	W	V
1.2510	0.90 1.05	0.15 0.35	1.00 1.20	≤ 0.030	≤ 0.030	0.50 0.70	0.50 0.70	0.05 0.15
O1	0.85 1.00	0.10 0.50	1.00 1.40	≤ 0.030	≤ 0.030	0.40 0.70	0.40 0.60	≤ 0.30
SKS3	0.90 1.00	≤ 0.35	0.90 1.20	≤ 0.030	≤ 0.030	0.50 1.00	0.50 1.00	--

Dimension

Shape	Thick / Dia. (mm)	Width (mm)
Round	8-700	/
Flat	1.6-200	20-1000
Block	150-600	200-1500

Delivery Condition

EAF+(ESR) or EAF+LF+VD+(ESR), Hot rolled, Cold rolled or Forged, Spheroidizing Annealed, Hardness≤220HB, Unmachined or Machined surface (Peeled, Turned, Milled, Grinded), UT 100% Passed

Characteristics

1. A kind of low-alloy cold work tool steel

2. With certain hardenability and wear resistance, homogenous and small particle carbides.

Applications

Typical applications for DIN 1.2510 tool steel are blanking, forming, and trim dies, gages, slitting cutters, punches, bolster dies, knock-out pins, thread roll dies, bending dies, plastic mold dies, shims, cams, machine ways, stamps, machine parts, jigs, cutter templates, swaging dies, etc.

Forging Technique

Heat Temperature	Start Forging Temperature	Finish Forging Temperature	Cooling Method
1150 - 1200 °C	1100 - 1150 °C	≥920 °C	Slow cooling

Heat Treatment

Annealing

The recommended annealing practice is to use controlled-atmosphere furnaces. If these are not available, pack-anneal in an inert material. For a quick annealing cycle to develop fair machining properties, heat slowly to 1375 to 1425°F. and cool slowly in the furnace. To develop the lowest hardness and best spheroidization for optimum machinability, heat slowly to 1450°F. and furnace cool at 20 degrees per hour to 900°F. The piece may then be removed from the furnace and cooled in air. Hardness after this cycle will be Brinell 202 max.

Stress relieving

When desirable to relieve the strains of machining, heat slowly to 1050°-1250°F, allow to equalize, and then cool in still air (Strain Relieving).The recommended annealing practice is to use controlled-atmosphere furnaces. If these are not available, pack-anneal in an inert material. For a quick annealing cycle to develop fair machining properties, heat slowly to 1375 to 1425°F. and cool slowly in the furnace. To develop the lowest hardness and best spheroidization for optimum machinability, heat slowly to 1450°F. and furnace cool at 20 degrees per hour to 900°F. The piece may then be removed from the furnace and cooled in air. Hardness after this cycle will be Brinell 202 max.

Hardening

After thorough prhe hardening furnace, operating from 1450°-1500°F, depending on the size of the part.Warm slightly before charging into the preheat furnace, which should be operating at about 1100°-1200°F.

Tempering

O1 is generally tempered in the range of 300°-600°F. Tempering temperatures and resulting Rockwell C hardness, based on a 1 inch round samples oil quenched from 1475°F and tempered for 2 hours, are as follows:

Tempering Temperature °F	Rockwell °C
300	65
350	63
400	62.5
450	61
500	60
600	57

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