X2CrNiMoN17-13-5 (317L)

Opis

X2CrNiMoN17-13-5 (EN 1.4438 / AISI 317L) per EN 10088. 3.0-4.0% Mo gives PRE approx 30 — significantly better than 316L (PRE 25). Low carbon prevents sensitisation. Standard for bleach plants, SO2/SO3 environments, phosphoric acid service and chemical plant where 316L fails prematurely.

Ključna svojstva — Solution Annealed

Rm (Tensile Strength)

515

MPa

Re / Rp0.2 (Yield)

205

MPa

A₅ (Elongation)

≥ 35.0

Hardness

— – 217

E (Young's Modulus)

195

GPa

Gustoća

7.98

g/cm³

Glavne oznake (12)

Standardno tijelo	Oznaka	Zemlja / Region	Napomena
EN	X2CrNiMoN17-13-5 / 1.4438	EU
AISI/SAE	317L	USA
ASTM	A240 / A276 Type 317L	USA
UNS	S31703	USA (UNS)
JIS	SUS317L	Japan
GOST	03H17N14M3 (nearest)	Russia
BS EN	317S12	UK
JUS	C.4588L	Yugoslavia	High-Mo low-C austenitic stainless
EN	X2CrNiMo18-15-4 / 1.4438	EU
DIN W.Nr	1.4438	Germany
ASTM	A240 Type 317L	USA
JUS	C.4573H	Yugoslavia/BiH	Visoko-Mo inox 317L; JUS C.B2.040

Standardi (12)

#	Standardno tijelo	Oznaka	Zemlja / Region	Napomena
1	EN	X2CrNiMoN17-13-5 / 1.4438	EU	—
2	AISI/SAE	317L	USA	—
3	ASTM	A240 / A276 Type 317L	USA	—
4	UNS	S31703	USA (UNS)	—
5	JIS	SUS317L	Japan	—
6	GOST	03H17N14M3 (nearest)	Russia	—
7	BS EN	317S12	UK	—
8	JUS	C.4588L	Yugoslavia	High-Mo low-C austenitic stainless
9	EN	X2CrNiMo18-15-4 / 1.4438	EU	—
10	DIN W.Nr	1.4438	Germany	—
11	ASTM	A240 Type 317L	USA	—
12	JUS	C.4573H	Yugoslavia/BiH	Visoko-Mo inox 317L; JUS C.B2.040

Sve vrijednosti u masenim %

Carbon

≤ 0.0300

Silicon

≤ 1.0000

Manganese

≤ 2.0000

Chromium

17.5000 – 19.5000

Nickel

11.0000 – 14.0000

Molybdenum

3.0000 – 4.0000

Nitrogen

≤ 0.1100

Element	Simbol	Min %	Max %	Tipično %
Carbon	C	—	0.0300	0.0150
Silicon	Si	—	1.0000	0.5000
Manganese	Mn	—	2.0000	1.2000
Chromium	Cr	17.5000	19.5000	18.0000
Nickel	Ni	11.0000	14.0000	12.5000
Molybdenum	Mo	3.0000	4.0000	3.5000
Nitrogen	N	—	0.1100	0.0400

Mehanička svojstva

Stanje	Šifra	Rm min MPa	Rm max MPa	Re min MPa	Re max MPa	A₅ min %	Z %	KV J	HB min	HB max	HRC min	HRC max	E GPa
Solution Annealed	+AT	515	—	205	—	35.0	—	—	—	217	—	—	195.0

Fizikalna svojstva

Gustoća

7.980

g/cm³

Tačka topljenja

1370–1400

°C

Youngov modul

195.0

GPa

Poissonov koeficijent

0.290

—

Topl. provodljivost

16.0

W/m·K

Topl. rastezanje

16.50

×10⁻⁶ /K

Specifična toplota

500

J/kg·K

El. otpornost

0.7800

µΩ·m

Magnetno

Toplinska obrada

Solution Annealing

Temperatura:1040°C – 1120°C

Medium:Water quench

Trajanje:Sufficient

Hlađenje:Rapid

Tvrdoća nakon:<=HB 217

Restores full corrosion resistance.

Obradivost

Indeks obradivosti

relativno prema AISI B1112 = 100%

40.0%

Teško

Brzina tokarenja (HSS)

m/min

Brzina tokarenja (karbid)

m/min

Posmak (tokarenje)

0.100

mm/rev

Brzina bušenja (HSS)

m/min

Brzina glodanja (karbid)

m/min

Rashladni fluid	High-pressure flood coolant mandatory
Oblici strugotine	Long stringy work-hardening chips
Rezni alat	TiAlN carbide; sharp positive rake
Površinska hrapavost	Ra 0.4-1.6 um

Similar to 316L.

Primjena

Pulp & Paper

Bleach plant piping, vessels and rotary drum washers.

Chemical

Phosphoric acid, sulphurous acid and halide-bearing process streams.

Marine

High-chloride seawater service where 316L suffers pitting.

Pulp Mills

Sulphite pulp digesters, bleach plant and white liquor piping.

Chemical

FGD scrubbers, H2SO4 coolers and chemical plant above 316L capability.

Marine

Seawater systems where 316L pits marginally.

Tehničke napomene

✅

317L vs 316L

Mo 3.0-4.0% vs 2.0-2.5% for 316L. PRE ~30 vs ~25. Use 317L when 316L shows corrosion in service or when Cl->1000 ppm + temp>60 C.

🔥

Weldability

Excellent. Use 317L or 318 filler. No pre-heat.

✅

317L vs 316L vs 904L

316L: PRE~24 -- standard. 317L: PRE~28 -- one step up. 904L: PRE~35 -- large step up. Use 317L when 316L shows borderline pitting and 904L would be over-specified (cost-sensitive applications).