EN 10083 Standard Guide

Steels for quenching and tempering:

Part 1: General technical delivery conditions

Part 2: Technical delivery conditions for non alloy steels

Part 3: Technical delivery conditions for alloy steels

EN 10083 SCOPE

Product Forms	Semi-finished products, bars, rod, wide flats, hot-rolled strip/sheet/plate, forgings
Steel Types	Direct hardening steels for quenching & tempering, flame & induction hardening steels
Applications	Quenched and tempered, flame or induction hardened machine parts

NON-ALLOY STEELS – Chemical Composition (Cast Analysis)

QUALITY STEELS (5 grades)

Steel Name	Number	C min	C max	Si max	Mn min	Mn max	P max	S max/range	Cr max	Mo max	Ni max
C35	1.0501	0.32	0.39	0.40	0.50	0.80	0.045	max 0.045	0.40	0.10	0.40
C40	1.0511	0.37	0.44	0.40	0.50	0.80	0.045	max 0.045	0.40	0.10	0.40
C45	1.0503	0.42	0.50	0.40	0.50	0.80	0.045	max 0.045	0.40	0.10	0.40
C55	1.0535	0.52	0.60	0.40	0.60	0.90	0.045	max 0.045	0.40	0.10	0.40
C60	1.0601	0.57	0.65	0.40	0.60	0.90	0.045	max 0.045	0.40	0.10	0.40

SPECIAL STEELS (13 grades)

Steel Name	Number	C min	C max	Si max	Mn min	Mn max	P max	S max/range	Cr max	Mo max	Ni max
C22E	1.1151	0.17	0.24	0.40	0.40	0.70	0.030	max 0.035	0.40	0.10	0.40
C22R	1.1149	0.17	0.24	0.40	0.40	0.70	0.030	0.020-0.040	0.40	0.10	0.40
C35E	1.1181	0.32	0.39	0.40	0.50	0.80	0.030	max 0.035	0.40	0.10	0.40
C35R	1.1180	0.32	0.39	0.40	0.50	0.80	0.030	0.020-0.040	0.40	0.10	0.40
C40E	1.1186	0.37	0.44	0.40	0.50	0.80	0.030	max 0.035	0.40	0.10	0.40
C40R	1.1189	0.37	0.44	0.40	0.50	0.80	0.030	0.020-0.040	0.40	0.10	0.40
C45E	1.1191	0.42	0.50	0.40	0.50	0.80	0.030	max 0.035	0.40	0.10	0.40
C45R	1.1201	0.42	0.50	0.40	0.50	0.80	0.030	0.020-0.040	0.40	0.10	0.40
C50E	1.1206	0.47	0.55	0.40	0.60	0.90	0.030	max 0.035	0.40	0.10	0.40
C50R	1.1241	0.47	0.55	0.40	0.60	0.90	0.030	0.020-0.040	0.40	0.10	0.40
C55E	1.1203	0.52	0.60	0.40	0.60	0.90	0.030	max 0.035	0.40	0.10	0.40
C55R	1.1209	0.52	0.60	0.40	0.60	0.90	0.030	0.020-0.040	0.40	0.10	0.40
C60E	1.1221	0.57	0.65	0.40	0.60	0.90	0.030	max 0.035	0.40	0.10	0.40
C60R	1.1223	0.57	0.65	0.40	0.60	0.90	0.030	0.020-0.040	0.40	0.10	0.40
28Mn6	1.1170	0.25	0.32	0.40	1.30	1.65	0.030	max 0.035	0.40	0.10	0.40

ALLOY STEELS – Chemical Composition (Cast Analysis)

CHROMIUM STEELS (8 grades including S-variants)

Steel Name	Number	C min	C max	Si max	Mn min	Mn max	P max	S max/range	Cr min	Cr max	Mo min	Mo max	Ni min
38Cr2	1.7003	0.35	0.42	0.40	0.50	0.80	0.025	max 0.035	0.40	0.60	–	–	–
46Cr2	1.7006	0.42	0.50	0.40	0.50	0.80	0.025	max 0.035	0.40	0.60	–	–	–
34Cr4	1.7033	0.30	0.37	0.40	0.60	0.90	0.025	max 0.035	0.90	1.20	–	–	–
34CrS4	1.7037	0.30	0.37	0.40	0.60	0.90	0.025	0.020-0.040	0.90	1.20	–	–	–
37Cr4	1.7034	0.34	0.41	0.40	0.60	0.90	0.025	max 0.035	0.90	1.20	–	–	–
37CrS4	1.7038	0.34	0.41	0.40	0.60	0.90	0.025	0.020-0.040	0.90	1.20	–	–	–
41Cr4	1.7035	0.38	0.45	0.40	0.60	0.90	0.025	max 0.035	0.90	1.20	–	–	–
41CrS4	1.7039	0.38	0.45	0.40	0.60	0.90	0.025	0.020-0.040	0.90	1.20	–	–	–

CHROMIUM-MOLYBDENUM STEELS (10 grades including S-variants)

Steel Name	Number	C min	C max	Si max	Mn min	Mn max	P max	S max/range	Cr min	Cr max	Mo min	Mo max	Ni min
25CrMo4	1.7218	0.22	0.29	0.40	0.60	0.90	0.025	max 0.035	0.90	1.20	0.15	0.30	–
25CrMoS4	1.7213	0.22	0.29	0.40	0.60	0.90	0.025	0.020-0.040	0.90	1.20	0.15	0.30	–
34CrMo4	1.7220	0.30	0.37	0.40	0.60	0.90	0.025	max 0.035	0.90	1.20	0.15	0.30	–
34CrMoS4	1.7226	0.30	0.37	0.40	0.60	0.90	0.025	0.020-0.040	0.90	1.20	0.15	0.30	–
42CrMo4	1.7225	0.38	0.45	0.40	0.60	0.90	0.025	max 0.035	0.90	1.20	0.15	0.30	–
42CrMoS4	1.7227	0.38	0.45	0.40	0.60	0.90	0.025	0.020-0.040	0.90	1.20	0.15	0.30	–
50CrMo4	1.7228	0.46	0.54	0.40	0.50	0.80	0.025	max 0.035	0.90	1.20	0.15	0.30	–
34CrNiMo6	1.6582	0.30	0.38	0.40	0.50	0.80	0.025	max 0.035	1.30	1.70	0.15	0.30	1.30
30CrNiMo8	1.6580	0.26	0.34	0.40	0.50	0.80	0.025	max 0.035	1.80	2.20	0.30	0.50	1.80
39NiCrMo3	1.6510	0.35	0.43	0.40	0.50	0.80	0.025	max 0.035	0.60	1.00	0.15	0.25	0.70

NICKEL STEELS (6 grades)

Steel Name	Number	C min	C max	Si max	Mn min	Mn max	P max	S max/range	Cr min	Cr max	Mo min	Mo max	Ni min
35NiCr6	1.5815	0.30	0.37	0.40	0.60	0.90	0.025	max 0.025	0.80	1.10	–	–	1.20
36NiCrMo16	1.6773	0.32	0.39	0.40	0.50	0.80	0.025	max 0.025	1.60	2.00	0.25	0.45	3.60
30NiCrMo16-6	1.6747	0.26	0.33	0.40	0.50	0.80	0.025	max 0.025	1.20	1.50	0.30	0.60	3.30
51CrV4	1.8159	0.47	0.55	0.40	0.70	1.10	0.025	max 0.025	0.90	1.20	–	–	–

BORON STEELS (6 grades)

Steel Name	Number	C min	C max	Si max	Mn min	Mn max	P max	S max/range	Cr min	Cr max	Mo min	Mo max	Ni min
20MnB5	1.5530	0.17	0.23	0.40	1.10	1.40	0.025	max 0.035	–	–	–	–	–
30MnB5	1.5531	0.27	0.33	0.40	1.15	1.45	0.025	max 0.035	–	–	–	–	–
38MnB5	1.5532	0.36	0.42	0.40	1.15	1.45	0.025	max 0.035	–	–	–	–	–
27MnCrB5-2	1.7182	0.24	0.30	0.40	1.10	1.40	0.025	max 0.035	0.30	0.60	–	–	–
33MnCrB5-2	1.7185	0.30	0.36	0.40	1.20	1.50	0.025	max 0.035	0.30	0.60	–	–	–
39MnCrB6-2	1.7189	0.36	0.42	0.40	1.40	1.70	0.025	max 0.035	0.30	0.60	–	–	–

NON-ALLOY MECHANICAL PROPERTIES – Quenched & Tempered (+QT)

QUALITY STEELS

Steel Name	Number	d≤16mm   t≤8mm						16<d≤40mm    8<t≤20mm						40<d≤100mm   20<t≤60mm
		Re	Rm	A%	Z%	KV		Re	Rm	A%	Z%	KV		Re	Rm	A%	Z%	KV
C35	1.0501	430	630-780	17	40	–		380	600-750	19	45	–		320	550-700	20	50	–
C40	1.0511	460	650-800	16	35	–		400	630-780	18	40	–		350	600-750	19	45	–
C45	1.0503	490	700-850	14	35	–		430	650-800	16	40	–		370	630-780	17	45	–
C55	1.0535	550	800-950	12	30	–		490	750-900	14	35	–		420	700-850	15	40	–
C60	1.0601	580	850-1000	11	25	–		520	800-950	13	30	–		450	750-900	14	35	–

SPECIAL STEELS

Steel Name	Number	d≤16mm   t≤8mm						16<d≤40mm   8<t≤20mm						40<d≤100mm   20<t≤60mm
		Re	Rm	A%	Z%	KV		Re	Rm	A%	Z%	KV		Re	Rm	A%	Z%	KV
C22E	1.1151	340	500-650	20	50	–		290	470-620	22	50	50		–	–	–	–	–
C22R	1.1149	340	500-650	20	50	–		290	470-620	22	50	50		–	–	–	–	–
C35E	1.1181	430	630-780	17	40	–		380	600-750	19	45	35		320	550-700	20	50	35
C35R	1.1180	430	630-780	17	40	–		380	600-750	19	45	35		320	550-700	20	50	35
C40E	1.1186	460	650-800	16	35	–		400	630-780	18	40	30		350	600-750	19	45	30
C40R	1.1189	460	650-800	16	35	–		400	630-780	18	40	30		350	600-750	19	45	30
C45E	1.1191	490	700-850	14	35	–		430	650-800	16	40	25		370	630-780	17	45	25
C45R	1.1201	490	700-850	14	35	–		430	650-800	16	40	25		370	630-780	17	45	25
C50E	1.1206	520	750-900	13	30	–		460	700-850	15	35	–		400	650-800	16	40	–
C50R	1.1241	520	750-900	13	30	–		460	700-850	15	35	–		400	650-800	16	40	–
C55E	1.1203	550	800-950	12	30	–		490	750-900	14	35	–		420	700-850	15	40	–
C55R	1.1209	550	800-950	12	30	–		490	750-900	14	35	–		420	700-850	15	40	–
C60E	1.1221	580	850-1000	11	25	–		520	800-950	13	30	–		450	750-900	14	35	–
C60R	1.1223	580	850-1000	11	25	–		520	800-950	13	30	–		450	750-900	14	35	–
28Mn6	1.1170	590	800-950	13	40	–		490	700-850	15	45	40		440	650-800	16	50	40

NON-ALLOY MECHANICAL PROPERTIES – Normalized (+N)

QUALITY STEELS

Steel Name	Number	d≤16mm t≤16mm				16<d≤100mm 16<t≤100mm				100<d≤250mm 100<t≤250mm
		Re	Rm	A%		Re	Rm	A%		Re	Rm	A%
C35	1.0501	300	550	18		270	520	19		245	500	19
C40	1.0511	320	580	16		290	550	17		260	530	17
C45	1.0503	340	620	14		305	580	16		275	560	16
C55	1.0535	370	680	11		330	640	12		300	620	12
C60	1.0601	380	710	10		340	670	11		310	650	11

SPECIAL STEELS

Steel Name	Number	d≤16mm t≤16mm				16<d≤100mm 16<t≤100mm				100<d≤250mm 100<t≤250mm
		Re	Rm	A%		Re	Rm	A%		Re	Rm	A%
C22E	1.1151	240	430	24		210	410	25		–	–	–
C22R	1.1149	240	430	24		210	410	25		–	–	–
C35E	1.1181	300	550	18		270	520	19		245	500	19
C35R	1.1180	300	550	18		270	520	19		245	500	19
C40E	1.1186	320	580	16		290	550	17		260	530	17
C40R	1.1189	320	580	16		290	550	17		260	530	17
C45E	1.1191	340	620	14		305	580	16		275	560	16
C45R	1.1201	340	620	14		305	580	16		275	560	16
C50E	1.1206	355	650	13		320	610	14		290	590	14
C50R	1.1241	355	650	13		320	610	14		290	590	14
C55E	1.1203	370	680	11		330	640	12		300	620	12
C55R	1.1209	370	680	11		330	640	12		300	620	12
C60E	1.1221	380	710	10		340	670	11		310	650	11
C60R	1.1223	380	710	10		340	670	11		310	650	11
28Mn6	1.1170	345	630	17		310	600	18		290	590	18

ALLOY STEELS – COMPLETE MECHANICAL PROPERTIES (+QT)

CHROMIUM STEELS (8 grades including S-variants)

Name	Number	d≤16 t≤8						16<d≤40 8<t≤20						40<d≤100 20<t≤60
		Re	Rm	A	Z	KV		Re	Rm	A	Z	KV		Re	Rm	A	Z	KV
38Cr2	1.7003	550	800-950	14	35	–		450	700-850	15	40	35		350	600-750	17	45	35
46Cr2	1.7006	650	900-1100	12	35	–		550	800-950	14	40	35		400	650-800	15	45	35
34Cr4	1.7033	700	900-1100	12	35	–		590	800-950	14	40	40		460	700-850	15	45	40
34CrS4	1.7037	700	900-1100	12	35	–		590	800-950	14	40	40		460	700-850	15	45	40
37Cr4	1.7034	750	950-1150	11	35	–		630	850-1000	13	40	35		510	750-900	14	40	35
37CrS4	1.7038	750	950-1150	11	35	–		630	850-1000	13	40	35		510	750-900	14	40	35
41Cr4	1.7035	800	1000-1200	11	30	–		660	900-1100	12	35	35		560	800-950	14	40	35
41CrS4	1.7039	800	1000-1200	11	30	–		660	900-1100	12	35	35		560	800-950	14	40	35

CHROMIUM-MOLYBDENUM STEELS (10 grades including S-variants)

Name	Number	d≤16 t≤8						16<d≤40 8<t≤20						40<d≤100 20<t≤60						100<d≤160 60<t≤100						160<d≤250 100<t≤160
		Re	Rm	A	Z	KV		Re	Rm	A	Z	KV		Re	Rm	A	Z	KV		Re	Rm	A	Z	KV		Re	Rm	A	Z	KV
25CrMo4	1.7218	700	900-1100	12	50	–		600	800-950	14	55	50		450	700-850	15	60	50		400	650-800	16	60	45		–	–	–	–	–
25CrMoS4	1.7213	700	900-1100	12	50	–		600	800-950	14	55	50		450	700-850	15	60	50		400	650-800	16	60	45		–	–	–	–	–
34CrMo4	1.7220	800	1000-1200	11	45	–		650	900-1100	12	50	40		550	800-950	14	55	45		500	750-900	15	55	45		450	700-850	15	60	45
34CrMoS4	1.7226	800	1000-1200	11	45	–		650	900-1100	12	50	40		550	800-950	14	55	45		500	750-900	15	55	45		450	700-850	15	60	45
42CrMo4	1.7225	900	1100-1300	10	40	–		750	1000-1200	11	45	35		650	900-1100	12	50	35		550	800-950	13	50	35		500	750-900	14	55	35
42CrMoS4	1.7227	900	1100-1300	10	40	–		750	1000-1200	11	45	35		650	900-1100	12	50	35		550	800-950	13	50	35		500	750-900	14	55	35
50CrMo4	1.7228	900	1100-1300	9	40	–		780	1000-1200	10	45	30		700	900-1100	12	50	30		650	850-1000	13	50	30		550	800-950	13	50	30
34CrNiMo6	1.6582	1000	1200-1400	9	40	–		900	1100-1300	10	45	45		800	1000-1200	11	50	45		700	900-1100	12	55	45		600	800-950	13	55	45
30CrNiMo8	1.6580	1050	1250-1450	9	40	–		1050	1250-1450	9	40	30		900	1000-1300	10	45	35		800	1000-1200	11	50	45		700	900-1100	12	50	45
39NiCrMo3	1.6510	785	980-1180	11	40	–		735	930-1130	11	40	35		685	880-1080	12	45	40		635	830-980	12	50	40		540	740-880	13	50	40

NICKEL STEELS (6 grades)

Name	Number	d≤16 t≤8						16<d≤40 8<t≤20						40<d≤100 20<t≤60						100<d≤160 60<t≤100						160<d≤250 100<t≤160
		Re	Rm	A	Z	KV		Re	Rm	A	Z	KV		Re	Rm	A	Z	KV		Re	Rm	A	Z	KV		Re	Rm	A	Z	KV
35NiCr6	1.5815	740	880-1080	12	40	–		740	880-1080	14	40	35		640	780-980	15	40	35		–	–	–	–	–		–	–	–	–	–
36NiCrMo16	1.6773	1050	1250-1450	9	40	–		1050	1250-1450	9	40	30		900	1100-1300	10	45	35		800	1000-1200	11	50	45		800	1000-1200	11	50	45
30NiCrMo16-6	1.6747	880	1080-1230	10	45	–		880	1080-1230	10	45	35		880	1080-1230	10	45	35		790	900-1050	11	50	35		880	900-1050	11	50	35
51CrV4	1.8159	900	1100-1300	9	40	–		800	1000-1200	10	45	30		700	900-1100	12	50	30		650	850-1000	13	50	30		600	800-950	13	50	30

BORON STEELS (6 grades)

Name	Number	d≤16 t≤8						16<d≤40 8<t≤20						40<d≤100 20<t≤60
		Re	Rm	A	Z	KV		Re	Rm	A	Z	KV		Re	Rm	A	Z	KV
20MnB5	1.5530	700	900-1050	14	55	–		600	750-900	15	55	60		–	–	–	–	–
30MnB5	1.5531	800	950-1150	13	50	–		650	800-950	13	50	60		–	–	–	–	–
38MnB5	1.5532	900	1050-1250	12	50	–		700	850-1050	12	50	60		–	–	–	–	–
27MnCrB5-2	1.7182	800	1000-1250	14	55	–		750	900-1150	14	55	60		700	800-1000	15	55	65
33MnCrB5-2	1.7185	850	1050-1300	13	50	–		800	950-1200	13	50	50		750	900-1100	13	50	50
39MnCrB6-2	1.7189	900	1100-1350	12	50	–		850	1050-1250	12	50	40		800	1000-1200	12	50	40

MAXIMUM HARDNESS – Soft Annealed (+A) and Shearability (+S)

NON-ALLOY QUALITY STEELS
Steel Name	Number	Max HBW +S	Max HBW +A
C35	1.0501	Shearable untreated	–
C40	1.0511	Shearable untreated	–
C45	1.0503	255	207
C55	1.0535	255	229
C60	1.0601	255	241

NON-ALLOY SPECIAL STEELS
Steel Name	Number	Max HBW +S	Max HBW +A
C22E	1.1151	Shearable untreated	–
C22R	1.1149	Shearable untreated	–
C35E	1.1181	Shearable untreated	–
C35R	1.1180	Shearable untreated	–
C40E	1.1186	Shearable untreated	–
C40R	1.1189	Shearable untreated	–
C45E	1.1191	255	207
C45R	1.1201	255	207
C50E	1.1206	255	217
C50R	1.1241	255	217
C55E	1.1203	255	229
C55R	1.1209	255	229
C60E	1.1221	255	241
C60R	1.1223	255	241
28Mn6	1.1170	255	223

ALLOY STEELS
Steel Name	Number	Max HBW +S	Max HBW +A
38Cr2	1.7003	255	207
46Cr2	1.7006	255	223
34Cr4	1.7033	255	223
34CrS4	1.7037	255	223
37Cr4	1.7034	255	235
37CrS4	1.7038	255	235
41Cr4	1.7035	255	241
41CrS4	1.7039	255	241
25CrMo4	1.7218	255	212
25CrMoS4	1.7213	255	212
34CrMo4	1.7220	255	223
34CrMoS4	1.7226	255	223
42CrMo4	1.7225	255	241
42CrMoS4	1.7227	255	241
50CrMo4	1.7228	–	248
34CrNiMo6	1.6582	–	248
30CrNiMo8	1.6580	–	248
35NiCr6	1.5815	–	223
36NiCrMo16	1.6773	–	269
39NiCrMo3	1.6510	–	240
30NiCrMo16-6	1.6747	–	270
51CrV4	1.8159	–	248
20MnB5	1.5530	Shearable untreated	–
30MnB5	1.5531	Shearable untreated	–
38MnB5	1.5532	Shearable untreated	–
27MnCrB5-2	1.7182	Shearable untreated	–
33MnCrB5-2	1.7185	255	–
39MnCrB6-2	1.7189	255	–

SURFACE HARDNESS – After Flame or Induction Hardening

NON-ALLOY STEELS (Suitable for flame/induction)
Steel Name	Number	Min HRC Surface
C35E	1.1181	48
C35R	1.1180	48
C45E	1.1191	55
C45R	1.1201	55
C50E	1.1206	56
C50R	1.1241	56
C55E	1.1203	58
C55R	1.1209	58

ALLOY STEELS (Suitable for flame/induction)
Steel Name	Number	Min HRC Surface
46Cr2	1.7006	54
37Cr4	1.7034	51
37CrS4	1.7038	51
41Cr4	1.7035	53
41CrS4	1.7039	53
42CrMo4	1.7225	53
42CrMoS4	1.7227	53
50CrMo4	1.7228	58

SELECTION GUIDE – By Strength, Temperature, Application

BY STRENGTH LEVEL (Re MPa)
Low (200-400 MPa)	C22E/R, C35, C35E/R, C40, C40E/R
Medium (400-600 MPa)	C45, C45E/R, C50E/R, C55, C55E/R, 38Cr2, 46Cr2, 34Cr4/S, 37Cr4/S, 25CrMo4/S
High (600-800 MPa)	C60, C60E/R, 28Mn6, 41Cr4/S, 34CrMo4/S, 35NiCr6, 39NiCrMo3, 20MnB5, 30MnB5, 27MnCrB5-2
Very High (800-1000 MPa)	42CrMo4/S, 50CrMo4, 34CrNiMo6, 30CrNiMo8, 51CrV4, 38MnB5, 33MnCrB5-2, 39MnCrB6-2
Ultra High (>1000 MPa)	36NiCrMo16, 30NiCrMo16-6

BY TEMPERATURE SERVICE
Standard (ambient)	All carbon steels (C-series)
Elevated temperature	25CrMo4/S, 34CrMo4/S, 42CrMo4/S, 50CrMo4 (good high-temp strength)
Sub-zero to -40°C	All special steels with KV requirements (impact tested)

BY APPLICATION
General machinery	C35-C60 series, 34Cr4, 37Cr4, 41Cr4
Automotive components	C45E/R, 37Cr4, 42CrMo4, 30MnB5, 38MnB5, 27MnCrB5-2 (common for crankshafts, axles)
Heavy machinery	42CrMo4, 34CrNiMo6, 30CrNiMo8, 36NiCrMo16 (high strength, toughness)
Gears & shafts	25CrMo4, 34CrMo4, 42CrMo4, 34CrNiMo6, 30CrNiMo8
Springs	51CrV4 (V-alloyed for spring applications)
Flame/induction hardening	C35E-C55E, 37Cr4, 41Cr4, 42CrMo4, 50CrMo4, 46Cr2
Free-cutting (improved machinability)	All R-grades and S-grades (resulphurized)

HARDENABILITY OPTIONS
+H (normal)	Standard hardenability band
+HH (high)	Narrower band, higher guaranteed hardness
+HL (low)	Narrower band, lower hardness for reduced distortion

HEAT TREATMENT CONDITIONS
+U (untreated)	Hot-worked, as-rolled
+N (normalized)	Normalized (non-alloy steels)
+A (soft annealed)	For improved machinability
+S (shearability)	Treated for improved shearability
+QT (quenched & tempered)	Final heat-treated condition

HOW TO ORDER – Complete Ordering Instructions

MANDATORY INFORMATION
1. Quantity	Number of pieces to be delivered
2. Product Form	e.g. Round bars, flat bars, sheet/plate, rod, semi-finished products, forgings
3. Dimensional Standard	e.g. EN 10060 (round bars), EN 10058 (flat bars), EN 10029 (plate)
4. Dimensions	e.g. Diameter 20mm x Length 8000mm, or thickness x width x length
5. Standard Number	EN 10083-2 (for non-alloy) or EN 10083-3 (for alloy steels)
6. Steel Designation	Steel name (e.g. 25CrMo4) OR steel number (e.g. 1.7218)
7. Heat Treatment Symbol	+U (untreated), +N (normalized), +A (annealed), +S (shearability), +QT (Q&T)
8. Inspection Document	EN 10204: Type 2.1, 2.2, 3.1, or 3.2

OPTIONAL INFORMATION
Hardenability Requirements	+H (normal), +HH (high/narrow), +HL (low/narrow) – for special steels only
Surface Condition	+HW (hot-worked), +PI (pickled), +BC (blast cleaned), +RM (rough machined)
Product Analysis	Request verification of chemical composition if needed
Special Requirements	Non-metallic inclusions, grain size, ultrasonic testing, decarburization limits

ORDERING EXAMPLES

Example 1: Simple Order

20 round bars EN 10060 – 20×8000

EN 10083-3 – 25CrMo4+A

EN 10204 – 3.1

Example 2: With Hardenability

50 round bars EN 10060 – 30×6000

EN 10083-3 – 42CrMo4+H+QT

EN 10204 – 3.2

Example 3: Plate Order

10 plates EN 10029 – 25x1500x6000

EN 10083-2 – C45E+N

EN 10204 – 3.1

Surface class A, subclass 1 per EN 10163-2

Example 4: Using Steel Number

100 round bars EN 10060 – 40×12000

EN 10083-3 – 1.7220+A (This is 34CrMo4)

EN 10204 – 3.1

HEAT TREATMENT SYMBOLS EXPLAINED
+U or (none)	Untreated / hot-worked condition (default if not specified)
+N	Normalized – for non-alloy steels, improved toughness
+A	Soft annealed – for improved machinability
+S	Treated to improve shearability – specific hardness for cutting
+QT	Quenched and tempered – final heat-treated condition with guaranteed mechanical properties
+H	Normal hardenability requirements (Jominy test)
+HH	High/narrow hardenability band (more consistent hardness)
+HL	Low/narrow hardenability band (reduced distortion risk)

INSPECTION DOCUMENT TYPES (EN 10204)
Type 2.1	Test report – Declaration by manufacturer (no independent inspection)
Type 2.2	Test report – Declaration + test results by manufacturer
Type 3.1	Inspection certificate – Declaration + test results validated by manufacturer inspector
Type 3.2	Inspection certificate – Declaration + test results validated by independent inspector

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