EN 10088-2 Standard Guide

EN 10088-2 Standard Guide

Stainless steels – Part 2: Technical delivery conditions for sheet/plate and strip
of corrosion resistant steels for general purposes

ABBREVIATIONS & DESIGNATIONS

STD = Standard Grade – Good availability, shorter lead times

SP = Special Grade – Limited availability, may require 12-16 week lead times

MART = Martensitic – Heat treatable, magnetic, moderate corrosion resistance

PH = Precipitation Hardening – Age-hardenable, very high strength

PRODUCT FORMS

C = Cold rolled strip (typically ≤8mm thickness)

H = Hot rolled strip (typically ≤13.5mm thickness)

P = Hot rolled plate / quarto plates (typically ≤75mm thickness)

SURFACE FINISHES (Process Routes)

Most common hot rolled: 1D (pickled, descaled)

Most common cold rolled: 2B (pickled + skin passed, bright)

Work hardened: 2H (cold worked for higher strength)

Bright annealed: 2R (smooth, bright surface)

PRE = Pitting Resistance Equivalent

It’s a calculated index that predicts a stainless steel’s resistance to pitting corrosion in chloride-containing environments (seawater, chemical plants, etc.).

Formula:

PRE = Cr% + 3.3×Mo% + 16×N%

Where:

• Cr% = Chromium content
• Mo% = Molybdenum content
• N% = Nitrogen content

Why It Matters:

Higher PRE = Better pitting resistance

PRE Classification for Duplex:

• PRE ~25-26: Lean duplex (1.4362, 1.4062, 1.4162)
  • Good for mild chloride environments
• PRE ~30-35: Standard duplex (1.4462 “2205”)
  • Most common, excellent for seawater and chemical processing
• PRE ~40-42: Superduplex (1.4410 “2507”, 1.4507)
  • Severe chloride environments, offshore oil & gas
• PRE ~45+: Hyperduplex (1.4477)
  • Extreme conditions, deep seawater, highly acidic chloride solutions

IMPORTANT NOTES

1.	All chemical compositions are CAST ANALYSIS (ladle/heat analysis)
2.	Mechanical properties vary by product form (C, H, P) and thickness
3.	Patented grades (marked *) require licensing from patent holder
4.	Not all grades available in all product forms – check availability
5.	Cold worked products (2H) achieve much higher strengths
6.	Always specify inspection certificate type (minimum 2.2, usually 3.1)

Austenitic Stainless Steels Properties

Grade	Number	Name	C%	Si%	Mn%	P%	S%	Cr%	Ni%	Mo%	N%	Cu%	Form	Thick mm	Rp0.2 MPa	Rp1.0 MPa	Rm MPa	A%	AISI	Notes
STD	1.4318	X2CrNiN18-7	0.030	1.00	2.00	0.045	0.015	16.5-18.5	6.0-8.0	–	0.10-0.20	–	C	8	350	380	650-850	35-40	–	N-strengthened
STD	1.4318	X2CrNiN18-7	0.030	1.00	2.00	0.045	0.015	16.5-18.5	6.0-8.0	–	0.10-0.20	–	H	13.5	330	370	630-830	60	–
STD	1.4318	X2CrNiN18-7	0.030	1.00	2.00	0.045	0.015	16.5-18.5	6.0-8.0	–	0.10-0.20	–	P	75	330	370	630-830	45	–
STD	1.4382	X4CrNiCu18-7	0.05	1.00	2.00	0.045	0.015	17.0-19.0	6.0-8.0	–	0.05-0.15	0.5-2.0	C	8	230	260	550-850	45	–	Cu-bearing
STD	1.4382	X4CrNiCu18-7	0.05	1.00	2.00	0.045	0.015	17.0-19.0	6.0-8.0	–	0.05-0.15	0.5-2.0	H	13.5	210	250	500-800	60	–
STD	1.4310	X10CrNi18-8	0.03-0.15	2.00	2.00	0.045	0.015	16.0-19.0	6.0-9.5	0.80	0.10	1.00	C	8	250	280	600-950	40	–	For CW
STD	1.4307	X2CrNi18-9	0.030	1.00	2.00	0.045	0.015	17.5-19.5	8.0-10.5	–	0.10	–	C	8	220	250	520-700	45	304L	Very common
STD	1.4307	X2CrNi18-9	0.030	1.00	2.00	0.045	0.015	17.5-19.5	8.0-10.5	–	0.10	–	H	13.5	200	240	500-700	60	304L
STD	1.4307	X2CrNi18-9	0.030	1.00	2.00	0.045	0.015	17.5-19.5	8.0-10.5	–	0.10	–	P	75	200	240	500-700	45	304L
STD	1.4305	X8CrNiS18-9	0.10	1.00	2.00	0.045	0.15-0.35	17.0-19.0	8.0-10.0	–	0.10	1.00	P	75	190	230	500-700	35	–	Free mach
STD	1.4311	X2CrNiN18-10	0.030	1.00	2.00	0.045	0.015	17.5-19.5	8.5-11.5	–	0.12-0.22	–	C	8	290	320	550-750	40	304LN	N-strengthened
STD	1.4311	X2CrNiN18-10	0.030	1.00	2.00	0.045	0.015	17.5-19.5	8.5-11.5	–	0.12-0.22	–	H	13.5	270	310	550-750	60	304LN
STD	1.4311	X2CrNiN18-10	0.030	1.00	2.00	0.045	0.015	17.5-19.5	8.5-11.5	–	0.12-0.22	–	P	75	270	310	550-750	40	304LN
STD	1.4301	X5CrNi18-10	0.07	1.00	2.00	0.045	0.015	17.5-19.5	8.0-10.5	–	0.10	–	C	8	230	260	540-750	45	304	MOST COMMON
STD	1.4301	X5CrNi18-10	0.07	1.00	2.00	0.045	0.015	17.5-19.5	8.0-10.5	–	0.10	–	H	13.5	210	250	520-720	60	304
STD	1.4301	X5CrNi18-10	0.07	1.00	2.00	0.045	0.015	17.5-19.5	8.0-10.5	–	0.10	–	P	75	210	250	520-720	45	304
STD	1.4541	X6CrNiTi18-10	0.08	1.00	2.00	0.045	0.015	17.0-19.0	9.0-12.0	–	–	–	C	8	220	250	520-720	40	321	Ti-stabilized
STD	1.4541	X6CrNiTi18-10	0.08	1.00	2.00	0.045	0.015	17.0-19.0	9.0-12.0	–	–	–	H	13.5	200	240	500-700	60	321
STD	1.4541	X6CrNiTi18-10	0.08	1.00	2.00	0.045	0.015	17.0-19.0	9.0-12.0	–	–	–	P	75	200	240	500-700	40	321
STD	1.4306	X2CrNi19-11	0.030	1.00	2.00	0.045	0.015	18.0-20.0	10.0-12.0	–	0.10	–	C	8	220	250	520-700	45	304L
STD	1.4306	X2CrNi19-11	0.030	1.00	2.00	0.045	0.015	18.0-20.0	10.0-12.0	–	0.10	–	H	13.5	200	240	500-700	60	304L
STD	1.4306	X2CrNi19-11	0.030	1.00	2.00	0.045	0.015	18.0-20.0	10.0-12.0	–	0.10	–	P	75	200	240	500-700	45	304L
STD	1.4303	X4CrNi18-12	0.06	1.00	2.00	0.045	0.015	17.0-19.0	11.0-13.0	–	0.10	–	C	8	220	250	500-650	45	305
STD	1.4406	X2CrNiMoN17-11-2	0.030	1.00	2.00	0.045	0.015	16.5-18.5	10.0-12.5	2.0-2.5	0.12-0.22	–	C	8	300	330	580-780	40	316LN
STD	1.4406	X2CrNiMoN17-11-2	0.030	1.00	2.00	0.045	0.015	16.5-18.5	10.0-12.5	2.0-2.5	0.12-0.22	–	H	13.5	280	320	580-780	60	316LN
STD	1.4406	X2CrNiMoN17-11-2	0.030	1.00	2.00	0.045	0.015	16.5-18.5	10.0-12.5	2.0-2.5	0.12-0.22	–	P	75	280	320	580-780	40	316LN
STD	1.4404	X2CrNiMo17-12-2	0.030	1.00	2.00	0.045	0.015	16.5-18.5	10.0-13.0	2.0-3.0	0.10	–	C	8	240	270	530-680	40	316L	Very common
STD	1.4404	X2CrNiMo17-12-2	0.030	1.00	2.00	0.045	0.015	16.5-18.5	10.0-13.0	2.0-3.0	0.10	–	H	13.5	220	260	520-670	60	316L
STD	1.4404	X2CrNiMo17-12-2	0.030	1.00	2.00	0.045	0.015	16.5-18.5	10.0-13.0	2.0-3.0	0.10	–	P	75	220	260	520-670	45	316L
STD	1.4401	X5CrNiMo17-12-2	0.07	1.00	2.00	0.045	0.015	16.5-18.5	10.0-13.0	2.0-2.5	0.10	–	C	8	240	270	530-680	40	316
STD	1.4401	X5CrNiMo17-12-2	0.07	1.00	2.00	0.045	0.015	16.5-18.5	10.0-13.0	2.0-2.5	0.10	–	H	13.5	220	260	520-670	60	316
STD	1.4401	X5CrNiMo17-12-2	0.07	1.00	2.00	0.045	0.015	16.5-18.5	10.0-13.0	2.0-2.5	0.10	–	P	75	220	260	520-670	45	316
STD	1.4571	X6CrNiMoTi17-12-2	0.08	1.00	2.00	0.045	0.015	16.5-18.5	10.5-13.5	2.0-2.5	–	–	C	8	240	270	540-690	40	316Ti	Ti-stabilized
STD	1.4571	X6CrNiMoTi17-12-2	0.08	1.00	2.00	0.045	0.015	16.5-18.5	10.5-13.5	2.0-2.5	–	–	H	13.5	220	260	520-670	60	316Ti
STD	1.4571	X6CrNiMoTi17-12-2	0.08	1.00	2.00	0.045	0.015	16.5-18.5	10.5-13.5	2.0-2.5	–	–	P	75	220	260	520-670	40	316Ti
STD	1.4420*	X2CrNiMoN21-9-1*	0.030	1.00	2.00	0.045	0.015	19.5-21.5	8.0-9.5	0.5-1.5	0.14-0.25	1.00	C	8	350	380	650-850	35	–	PATENTED
STD	1.4420*	X2CrNiMoN21-9-1*	0.030	1.00	2.00	0.045	0.015	19.5-21.5	8.0-9.5	0.5-1.5	0.14-0.25	1.00	H	13.5	320	350	630-830	60	–
STD	1.4420*	X2CrNiMoN21-9-1*	0.030	1.00	2.00	0.045	0.015	19.5-21.5	8.0-9.5	0.5-1.5	0.14-0.25	1.00	P	75	320	350	630-830	40	–
STD	1.4432	X2CrNiMo17-12-3	0.030	1.00	2.00	0.045	0.015	16.5-18.5	10.5-13.0	2.5-3.0	0.10	–	C	8	240	270	550-700	40	316L
STD	1.4432	X2CrNiMo17-12-3	0.030	1.00	2.00	0.045	0.015	16.5-18.5	10.5-13.0	2.5-3.0	0.10	–	H	13.5	220	260	520-670	60	316L
STD	1.4432	X2CrNiMo17-12-3	0.030	1.00	2.00	0.045	0.015	16.5-18.5	10.5-13.0	2.5-3.0	0.10	–	P	75	220	260	520-670	45	316L
STD	1.4435	X2CrNiMo18-14-3	0.030	1.00	2.00	0.045	0.015	17.0-19.0	12.5-15.0	2.5-3.0	0.10	–	C	8	240	270	550-700	40	317L
STD	1.4435	X2CrNiMo18-14-3	0.030	1.00	2.00	0.045	0.015	17.0-19.0	12.5-15.0	2.5-3.0	0.10	–	H	13.5	220	260	520-670	60	317L
STD	1.4435	X2CrNiMo18-14-3	0.030	1.00	2.00	0.045	0.015	17.0-19.0	12.5-15.0	2.5-3.0	0.10	–	P	75	220	260	520-670	45	317L
STD	1.4439	X2CrNiMoN17-13-5	0.030	1.00	2.00	0.045	0.015	16.5-18.5	12.5-14.5	4.0-5.0	0.12-0.22	–	C	8	290	320	580-780	35	317LMN
STD	1.4439	X2CrNiMoN17-13-5	0.030	1.00	2.00	0.045	0.015	16.5-18.5	12.5-14.5	4.0-5.0	0.12-0.22	–	H	13.5	270	310	580-780	60	317LMN
STD	1.4439	X2CrNiMoN17-13-5	0.030	1.00	2.00	0.045	0.015	16.5-18.5	12.5-14.5	4.0-5.0	0.12-0.22	–	P	75	270	310	580-780	40	317LMN
STD	1.4539	X1NiCrMoCu25-20-5	0.020	0.70	2.00	0.030	0.010	19.0-21.0	24.0-26.0	4.0-5.0	0.15	1.2-2.0	C	8	240	270	530-730	35	904L	Ni-based
STD	1.4539	X1NiCrMoCu25-20-5	0.020	0.70	2.00	0.030	0.010	19.0-21.0	24.0-26.0	4.0-5.0	0.15	1.2-2.0	H	13.5	220	260	520-720	60	904L
STD	1.4539	X1NiCrMoCu25-20-5	0.020	0.70	2.00	0.030	0.010	19.0-21.0	24.0-26.0	4.0-5.0	0.15	1.2-2.0	P	75	220	260	520-720	35	904L
SP	1.4547	X1CrNiMoCuN20-18-7	0.020	0.70	1.00	0.030	0.010	19.5-20.5	17.5-18.5	6.0-7.0	0.18-0.25	0.5-1.0	C	8	320	350	650-850	35	–	254 SMO
SP	1.4547	X1CrNiMoCuN20-18-7	0.020	0.70	1.00	0.030	0.010	19.5-20.5	17.5-18.5	6.0-7.0	0.18-0.25	0.5-1.0	H	13.5	300	340	650-850	60	–
SP	1.4547	X1CrNiMoCuN20-18-7	0.020	0.70	1.00	0.030	0.010	19.5-20.5	17.5-18.5	6.0-7.0	0.18-0.25	0.5-1.0	P	75	300	340	650-850	40	–
SP	1.4565	X2CrNiMnMoN25-18-6-5	0.030	1.00	5.0-7.0	0.030	0.015	24.0-26.0	16.0-19.0	4.0-5.0	0.30-0.60	–	C	6	420	460	800-950	30	–	HIGH MN, HIGH STRENGTH
SP	1.4565	X2CrNiMnMoN25-18-6-5	0.030	1.00	5.0-7.0	0.030	0.015	24.0-26.0	16.0-19.0	4.0-5.0	0.30-0.60	–	H	10	420	460	800-950	30	–
SP	1.4565	X2CrNiMnMoN25-18-6-5	0.030	1.00	5.0-7.0	0.030	0.015	24.0-26.0	16.0-19.0	4.0-5.0	0.30-0.60	–	P	40	420	460	800-950	30	–
SP	1.4640	X6CrNi23-13	0.08	1.00	2.00	0.045	0.015	22.0-24.0	12.0-15.0	–	0.10	–	C/H/P	8/13.5/75	200	230	500-700	40	–	Heat resistant
SP	1.4550	X6CrNiNb18-10	0.08	1.00	2.00	0.045	0.015	17.0-19.0	9.0-12.0	–	–	–	C/H/P	8/13.5/75	200	230	500-700	35	347	Nb-stabilized
SP	1.4678	X2CrMnNi17-10-6	0.030	1.00	5.0-7.0	0.045	0.015	16.5-18.5	9.0-11.0	–	0.30-0.50	–	C	8	350	380	650-850	35	–	High Mn+N

Duplex Stainless Steels Properties

Grade	Number	Name	C%	Si%	Mn%	P%	S%	Cr%	Ni%	Mo%	N%	Cu%	Form	Thick mm	Rp0.2 MPa	Rm MPa	A%	PRE	Notes
STD	1.4062*	X2CrNiN22-2*	0.030	1.00	2.00	0.045	0.015	21.5-24.0	1.0-2.9	0.45	0.16-0.28	0.60	C	6.4	530	700-900	20	~25	Lean PATENTED
STD	1.4062*	X2CrNiN22-2*	0.030	1.00	2.00	0.045	0.015	21.5-24.0	1.0-2.9	0.45	0.16-0.28	0.60	P	75	450	650-850	30	~25
STD	1.4362	X2CrNiN23-4	0.030	1.00	2.00	0.045	0.015	22.0-24.5	3.5-5.5	0.1-0.6	0.05-0.20	0.30	C	8	450	650-850	20	~26	Lean 2304
STD	1.4362	X2CrNiN23-4	0.030	1.00	2.00	0.045	0.015	22.0-24.5	3.5-5.5	0.1-0.6	0.05-0.20	0.30	P	75	450	630-800	25	~26
STD	1.4162	X2CrMnNiN21-5-1	0.04	1.00	4.0-6.0	0.045	0.015	21.0-22.0	1.35-1.9	0.1-0.8	0.20-0.25	0.30	C	8	530	700-900	25	~25	Lean Mn-bearing
STD	1.4162	X2CrMnNiN21-5-1	0.04	1.00	4.0-6.0	0.045	0.015	21.0-22.0	1.35-1.9	0.1-0.8	0.20-0.25	0.30	P	75	450	650-850	30	~25
STD	1.4462	X2CrNiMoN22-5-3	0.030	1.00	2.00	0.045	0.015	21.0-23.0	4.5-6.5	2.5-3.5	0.10-0.22	0.30	C	8	500	700-950	20	~35	2205 MOST COMMON
STD	1.4462	X2CrNiMoN22-5-3	0.030	1.00	2.00	0.045	0.015	21.0-23.0	4.5-6.5	2.5-3.5	0.10-0.22	0.30	H	13.5	460	640-840	25	~35
STD	1.4462	X2CrNiMoN22-5-3	0.030	1.00	2.00	0.045	0.015	21.0-23.0	4.5-6.5	2.5-3.5	0.10-0.22	0.30	P	75	460	640-840	25	~35
STD	1.4482	X2CrMnNiMoN21-5-3	0.030	1.00	4.0-6.0	0.045	0.015	20.0-22.0	4.5-6.5	2.0-2.5	0.15-0.25	0.5-1.0	C	6.4	500	700-900	20	~30
STD	1.4662*	X2CrNiMnMoCuN24-4-3-2*	0.030	1.00	3.0-5.0	0.045	0.015	23.0-25.0	3.0-4.5	1.0-2.0	0.20-0.30	1.0-2.0	C	8	550	750-900	20	~30	PATENTED
STD	1.4662*	X2CrNiMnMoCuN24-4-3-2*	0.030	1.00	3.0-5.0	0.045	0.015	23.0-25.0	3.0-4.5	1.0-2.0	0.20-0.30	1.0-2.0	P	75	480	680-900	25	~30
SP	1.4507	X2CrNiMoCuN25-6-3	0.030	0.80	1.20	0.035	0.020	24.0-26.0	6.0-8.0	3.0-4.0	0.20-0.30	0.5-1.0	C	8	550	750-1000	20	~40	Superduplex
SP	1.4507	X2CrNiMoCuN25-6-3	0.030	0.80	1.20	0.035	0.020	24.0-26.0	6.0-8.0	3.0-4.0	0.20-0.30	0.5-1.0	P	75	530	730-930	25	~40
SP	1.4410	X2CrNiMoN25-7-4	0.030	1.00	2.00	0.035	0.020	24.0-26.0	6.0-8.0	3.0-4.5	0.24-0.35	0.50	C	8	550	750-1000	20	~42	2507 Superduplex
SP	1.4410	X2CrNiMoN25-7-4	0.030	1.00	2.00	0.035	0.020	24.0-26.0	6.0-8.0	3.0-4.5	0.24-0.35	0.50	P	75	530	730-930	25	~42
SP	1.4477	X2CrNiMoN29-7-2	0.030	0.75	1.50	0.040	0.015	28.0-30.0	5.8-7.5	1.5-2.6	0.30-0.40	0.80	C	8	650	800-1050	20	~45	Hyperduplex
SP	1.4477	X2CrNiMoN29-7-2	0.030	0.75	1.50	0.040	0.015	28.0-30.0	5.8-7.5	1.5-2.6	0.30-0.40	0.80	P	75	550	750-1000	20	~45

Ferritic Stainless Steels Properties

Grade	Number	Name	C%	Si%	Mn%	P%	S%	Cr%	Mo%	Ni%	Ti%	Nb%	Form	Thick mm	Rp0.2 lg MPa	Rp0.2 tr MPa	Rm MPa	A%	AISI	Notes
STD	1.4512	X2CrTi12	0.025	1.00	1.00	0.040	0.015	10.5-12.5	–	0.50	0.10-0.50	–	C	8	210	220	380-560	25	–	Ti-stabilized
STD	1.4512	X2CrTi12	0.025	1.00	1.00	0.040	0.015	10.5-12.5	–	0.50	0.10-0.50	–	H	13.5	210	220	380-560	25	–
STD	1.4003	X2CrNi12	0.030	1.00	1.50	0.040	0.015	10.5-12.5	–	0.30-1.00	–	–	C	8	280	320	450-650	20	409	Automotive
STD	1.4003	X2CrNi12	0.030	1.00	1.50	0.040	0.015	10.5-12.5	–	0.30-1.00	–	–	P	25	250	280	450-650	18	409
STD	1.4000	X6Cr13	0.08	1.00	1.00	0.040	0.015	12.0-14.0	–	0.50	–	–	C/H/P	8/13.5/25	220-240	230-250	400-600	19	410S
STD	1.4510	X3CrTi17	0.05	1.00	1.00	0.040	0.015	16.0-18.0	–	0.50	0.15-0.50	–	C/H	8/13.5	230	240	420-600	23	430Ti
STD	1.4016	X6Cr17	0.08	1.00	1.00	0.040	0.015	16.0-18.0	–	0.50	–	–	C	8	260	280	430-600	20	430	MOST COMMON FERRITIC
STD	1.4016	X6Cr17	0.08	1.00	1.00	0.040	0.015	16.0-18.0	–	0.50	–	–	H	13.5	240	260	430-600	18	430
STD	1.4016	X6Cr17	0.08	1.00	1.00	0.040	0.015	16.0-18.0	–	0.50	–	–	P	25	240	260	430-630	20	430
STD	1.4113	X6CrMo17-1	0.08	1.00	1.00	0.040	0.015	15.5-17.5	0.9-1.4	0.50	–	–	C/H	8/13.5	260	280	450-630	18	434
STD	1.4521	X2CrMoTi18-2	0.025	1.00	1.00	0.040	0.015	17.0-19.0	1.8-2.5	0.50	0.10-0.60	–	C	8	300	320	420-640	20	444	Mo-bearing
STD	1.4521	X2CrMoTi18-2	0.025	1.00	1.00	0.040	0.015	17.0-19.0	1.8-2.5	0.50	0.10-0.60	–	H	13.5	280	300	400-600	20	444
STD	1.4521	X2CrMoTi18-2	0.025	1.00	1.00	0.040	0.015	17.0-19.0	1.8-2.5	0.50	0.10-0.60	–	P	12	280	300	420-620	20	444
SP	1.4526	X2CrMoTi29-4	0.025	1.00	1.00	0.040	0.015	28.0-30.0	3.5-4.2	0.50	0.10-0.60	–	C/H	8/13.5	320	340	500-700	18	–	High Cr+Mo

Martensitic & PH Stainless Steels Properties

Type	Grade	Number	Name	C%	Si%	Mn%	Cr%	Ni%	Mo%	Heat Treat	Rp0.2 MPa	Rm MPa	A%	Hardness	AISI	Notes
MART	STD	1.4006	X12Cr13	0.08-0.15	1.00	1.00	11.5-13.5	0.75	–	+A	–	≤600	20	≤90 HRB	410	Annealed
MART	STD	1.4006	X12Cr13	0.08-0.15	1.00	1.00	11.5-13.5	0.75	–	+QT650	450	650-850	12	–	410	Q&T
MART	STD	1.4021	X20Cr13	0.16-0.25	1.00	1.00	12.0-14.0	0.75	–	+A	–	≤700	15	≤95 HRB	420	Annealed
MART	STD	1.4021	X20Cr13	0.16-0.25	1.00	1.00	12.0-14.0	0.75	–	+QT750	550	750-950	10	–	420	Q&T
MART	STD	1.4028	X30Cr13	0.26-0.35	1.00	1.00	12.0-14.0	0.75	–	+QT800	600	800-1000	10	–	–
MART	STD	1.4034	X46Cr13	0.43-0.50	1.00	1.00	12.5-14.5	0.75	–	+A	–	≤780	12	≤99 HRB	440B	Annealed
MART	STD	1.4034	X46Cr13	0.43-0.50	1.00	1.00	12.5-14.5	0.75	–	+QT	–	–	–	49-55 HRC	440B	Q&T
MART	STD	1.4116	X50CrMoV15	0.45-0.55	1.00	1.00	14.0-15.0	0.75	0.5-0.8	+A	–	≤850	12	≤100 HRB	440C	V-bearing
MART	STD	1.4313	X3CrNiMo13-4	0.05	1.00	1.50	12.0-14.0	3.5-4.5	0.3-0.8	+QT780	630	780-980	15	–	–	Supermartensitic
MART	STD	1.4313	X3CrNiMo13-4	0.05	1.00	1.50	12.0-14.0	3.5-4.5	0.3-0.8	+QT900	800	900-1100	11	–	–	High strength
MART	STD	1.4418	X4CrNiMo16-5-1	0.05	1.00	1.50	15.0-17.0	4.5-5.5	0.8-1.3	+QT840	660	840-1100	14	≥55 HRC	–	Supermartensitic
PH	SP	1.4542	X5CrNiCuNb16-4	0.07	1.00	1.00	15.0-17.0	3.0-5.0	–	+AT	–	≤1275	5	–	630	17-4 PH Annealed
PH	SP	1.4542	X5CrNiCuNb16-4	0.07	1.00	1.00	15.0-17.0	3.0-5.0	–	+P1070	1000	1070-1270	8	–	630	Aged
PH	SP	1.4542	X5CrNiCuNb16-4	0.07	1.00	1.00	15.0-17.0	3.0-5.0	–	+P1300	1150	≥1300	3	–	630	Highest strength
PH	SP	1.4568	X7CrNiAl17-7	0.09	1.00	1.00	16.0-18.0	6.5-7.75	–	+AT	–	≤1030	19	–	631	17-7 PH Annealed
PH	SP	1.4568	X7CrNiAl17-7	0.09	1.00	1.00	16.0-18.0	6.5-7.75	–	+P1450	1310	≥1450	2	–	631	Aerospace

KEY DIFFERENCES: EN 10088-1 vs EN 10088-2

10088-1:	Chemical compositions ONLY – no mechanical properties
10088-2:	COMPLETE specifications – chemistry + mechanical + testing + inspection

MOST COMMON GRADES BY CATEGORY

AUSTENITIC (Non-magnetic, excellent formability, most common overall)

1.4301 (304) X5CrNi18-10 – MOST COMMON GRADE, general purpose, Rp0.2: 230 MPa

1.4307 (304L) X2CrNi18-9 – Low carbon, better weldability, Rp0.2: 220 MPa

1.4404 (316L) X2CrNiMo17-12-2 – Mo-bearing, excellent corrosion, Rp0.2: 240 MPa

1.4541 (321) X6CrNiTi18-10 – Ti-stabilized for high temperature, Rp0.2: 220 MPa

DUPLEX (High strength, excellent SCC resistance)

1.4362 X2CrNiN23-4 – Lean duplex 2304, Rp0.2: 450 MPa, PRE ~26

1.4462 (2205) X2CrNiMoN22-5-3 – MOST COMMON DUPLEX, Rp0.2: 500 MPa, PRE ~35

1.4410 (2507) X2CrNiMoN25-7-4 – Superduplex, Rp0.2: 550 MPa, PRE ~42

FERRITIC (Magnetic, economical, good corrosion in mild environments)

1.4016 (430) X6Cr17 – MOST COMMON FERRITIC, architectural, Rp0.2: 260 MPa

1.4003 (409) X2CrNi12 – Automotive exhaust, economical, Rp0.2: 280 MPa

1.4521 (444) X2CrMoTi18-2 – Mo-bearing, hot water, Rp0.2: 300 MPa

MARTENSITIC (Heat treatable, magnetic, high strength possible)

1.4006 (410) X12Cr13 – General purpose martensitic, +QT650: Rp0.2 450 MPa

1.4021 (420) X20Cr13 – Higher carbon, higher strength, +QT750: Rp0.2 550 MPa

1.4313 X3CrNiMo13-4 – Supermartensitic, +QT900: Rp0.2 800 MPa

PRECIPITATION HARDENING (Very high strength, aerospace)

1.4542 (17-4 PH) X5CrNiCuNb16-4 – +P1300: Rp0.2 1150 MPa, highest strength

EN 10088-1 Standard Guide

EN 10088-3 Standard Guide

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