SFS · Finland · 137 designations

720

720 is a designation in SFS for the material held under material number 1.4306, also listed as X2CrNi19-11. It is a material in the category Stainless steels. We list 137 designations recorded for this grade, in the standards DIN / EN, UNS, AISI / SAE, ASTM, BS, AFNOR, UNE, SAE AMS, JIS, GB, GOST, UNI, SS, ČSN, PN, STN, ABNT NBR, ÖNORM and SFS.

Material no. 1.4306
Category Stainless steels · 468 grades
Designations 137

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If you came for one of these

The most-used names for this grade.

About Stainless steels

Stainless steels are corrosion-resistant alloy steels whose chromium content promotes a protective passive surface film. They are used for equipment, structures and components exposed to moisture, chemicals or hygienic service, with different alloy compositions selected for corrosion resistance, strength, formability or weldability.

This describes the material class as a whole. Always confirm the individual grade against the standard before ordering.

Also known as

137 designations · 19 standards · nothing hidden

This grade’s own namerecorded in our sources as this grade’s own designation under that standard.

Indicativetaken from a published cross-reference table; a close match, not a guarantee of interchangeability. Verify against the mill certificate before ordering.

Withdrawndesignation no longer current — a separate column from the two above, so a name can be same grade and withdrawn at once.

DIN / ENEurope · 3

UNSUnited States · 5

AISI / SAEUnited States · 7

BSUnited Kingdom · 12

AFNORFrance · 11

UNESpain · 4

SAE AMSUnited States / Aerospace · 16

JISJapan · 8

GBChina · 3

GOSTRussia / CIS · 7

UNIItaly · 2

SSSweden · 3

ČSNCzechia · 1

17249Indicative

PNPoland · 2

STNSlovakia · 1

17 249Indicative

ABNT NBRBrazil · 1

304 LIndicative

ÖNORMAustria · 1

X2CrNi19-11KKWIndicative

SFSFinland · 1

720Indicative

Every designation on file is listed — no truncation, no “+ n more”. Each one is itself a route that leads back here.

Chemical composition

8 elements on file · weight %

What this alloy is

Iron — the balance, never listed by a standard — 66.8 %Cr — 19 %Ni — 11 %Mn — 2 %Traces & impurities · 1.2 %

Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade.

Element	% by weight
	≤ 0.03
	≤ 1
	≤ 2
	0.045
	0.015
	18–20
	10–12
	0.11

0.01 %0.1 %1 %10 %100 %

The scale is logarithmic, not the element’s raw share of the alloy — the only honest way to fit 0.01 % and 100 % in one picture, and it means every value here can be compared with every other.

Element	As publishedsource text, verbatim	Min% by weight	Max% by weight	Bound
C	≤0,030	—	0.030	Max
N	0,11	0.110	0.110	Exact
Si	≤1,00	—	1.000	Max
P	0,045	0.045	0.045	Exact
S	0,015	0.015	0.015	Exact
Cr	18,0-20,0	18.000	20.000	Range
Mn	≤2,00	—	2.000	Max
Ni	10,0-12,0	10.000	12.000	Range

The published column is the source string byte-for-byte, decimal comma and all; Min and Max are the parsed bounds. Elements not listed have no value on file — they are omitted, never inferred.

Predicted transformation temperatures

Not enough recorded composition to predict a transformation temperature for this grade — missing: Mo.

Physical & mechanical properties

Density7,9g/cm³Exact

Thermal expansion coefficient16.810^-6/KExact

Thermal conductivity15W/(m·K)Exact

Specific heat capacity0.5J/(kg·K)Exact

Electrical resistivity0.73nΩ·mExact

An absent property means we hold no value for it — it is left out rather than estimated, interpolated from a neighbouring grade, or filled from a handbook. It does not mean the property is undefined for the material.

Properties by condition

7 conditions · 21 values

By delivery stateno delivery state statedsource steeljis

Delivery state	RmN/mm²	ReN/mm²	A%	HB
Casting	390	185	33	—
Solution heat treatment	—	—	—	183

By delivery stateno delivery state statedsource splav

Delivery state	RmN/mm²	ReN/mm²	A5%	Z%	HB
Forging, GOST 25054-81	441	176	40	45 – 55	—
03KH18N11 ( 03Х18Н11 ) , Forging GOST 25054-81	—	—	—	—	179

By delivery stateSoft annealedsource steelnumber

Delivery state	HB
Soft annealed	215

By dimensionQuenching 1020 - 1100°C,Cooling airsource splav

Dimensionmm	RmN/mm²	ReN/mm²	A5%	Z%
to Ø 60	440	155	40	55

By delivery stateSolution annealedsource steelnumber

Delivery state	HB
Solution annealed	200

By heat-treated conditionno delivery state statedsource splav

Heat-treated condition	RmN/mm²	ReN/mm²	A5%
Sheet trick, GOST 7350-77	490	196	40

By heat-treated conditionno delivery state statedsource splav

Heat-treated condition	RmN/mm²	ReN/mm²	A5%
Sheet thin, GOST 5582-75	490	196	40

1 further values are held for this grade under a condition the source did not name — a bound with no quantity attached. They are withheld rather than shown against a guessed condition.

Every figure holds only for the condition on its own row. Values are never merged across conditions or across sources, never averaged, and never interpolated between two rows. An em dash means no value on file — never zero. Figures are converted to the unit in the column header; the source’s own wording is kept and shown where the two differ.

Heat treatment

GJB 2294

Choose one25

A · QuenchingTemperature not stated
B · Solution annealing1050–1100 °C
Cooling Water

Supply condition

Solution annealingd≤180
Quenching or Solution annealing

Conditions the standard permits on delivery. No temperature or medium is published for these, so no order and no alternation is implied.

Source: www.caishuku.com

Similar grades — and why

Selection rule, stated so you can disagree with it: same number class 1.4, a shared category, and a published range for Cr / Ni that overlaps this grade’s. These are neighbours in composition space — they are not equivalents, and none is claimed to be interchangeable with this grade.

1.43111.4311

Cr 17,5-19,5 · Ni 8,50-11,50