AISI / SAE · United States · 67 designations

5145H

5145H is a designation in AISI / SAE for the material held under material number 1.7035, also listed as 41Cr4. It is a material in the category Quenched and tempered steels. We list 67 designations recorded for this grade, in the standards DIN / EN, UNS, AISI / SAE, BS, AFNOR, UNE, ISO, JIS, GB, GOST, UNI, SS, ČSN, PN, COPANT, SRPS, MKE, MSZ and BDS.

Material no. 1.7035
Category Quenched and tempered steels · 133 grades
Designations 67

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If you came for one of these

The most-used names for this grade.

About Quenched and tempered steels

Quenched and tempered steels are heat-treated steels designed to combine high strength with useful toughness and ductility. They are used for heavily loaded components such as shafts, gears, fasteners and structural machine parts where resistance to mechanical stress is required.

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

Also known as

67 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Withdrawndesignation no longer current — a separate column from the two above, so a name can be same grade and withdrawn at once.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 · 2

UNSUnited States · 2

AISI / SAEUnited States · 7

BSUnited Kingdom · 4

AFNORFrance · 4

UNESpain · 3

ISOInternational · 4

JISJapan · 5

GBChina · 2

GOSTRussia / CIS · 17

UNIItaly · 1

41Cr4Indicative

SSSweden · 2

ČSNCzechia · 5

PNPoland · 4

COPANTLatin America · 1

5140Indicative

SRPSSerbia · 1

Č.4131Indicative

MKETürkiye · 1

Ç 5140Indicative

MSZHungary · 1

Cr 3Indicative

BDSBulgaria · 1

45ChIndicative

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

Chemical composition

6 elements on file · weight %

What this alloy is

Iron — the balance, never listed by a standard — 97.3 %Cr — 1.1 %Mn — 0.8 %C — 0.4 %Traces & impurities · 0.5 %

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

Element	% by weight
	0.38–0.45
	≤ 0.4
	0.6–0.9
	0.035
	0.035
	0.9–1.2

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	0,38-0,45	0.380	0.450	Range
Si	≤0,40	—	0.400	Max
P	0,035	0.035	0.035	Exact
S	0,035	0.035	0.035	Exact
Cr	0,90-1,20	0.900	1.200	Range
Mn	0,60-0,90	0.600	0.900	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: Ni, Mo.

Physical & mechanical properties

Density7,72g/cm³Exact

Transformation point Ac1723°CExact

Transformation point Ac3760°CExact · Ac3(Acm)

Transformation point Ar3740°CExact · Ar3(Arcm)

Transformation point Ar1680°CExact

Weldabilitydifficult to weldAs published: hard weldability.

Flake sensitivitysusceptibleAs published: predisposed

Temper brittlenesssusceptibleAs published: predisposed

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 · 54 values

By delivery stateno delivery state statedsource splav

Delivery state	RmN/mm²	A5%	HB
Band annealed , GOST 2283-79	640 – 740	10 – 15	—
Band cold-worked , GOST 2283-79	740 – 1180	—	—
(annealing) , GOST 4543-71	—	—	229
(normalize) , Sheet trick GOST 1577-93	—	—	255
(annealing) , Sheet trick GOST 1577-93	—	—	217

By thicknessQuenched and temperedsource steelnumber

Thicknessmm	RmN/mm²
≤ 8	1000
8 – 20	900
20 – 50	800

By thicknessQuenched and tempered · round productssource steelnumber

Thicknessmm	A% · Lo = 5,65 √So
≤ 16	11
16 – 40	12
40 – 100	14

By delivery stateTreated to improve shearabilitysource steelnumber

Delivery state	HB
Treated to improve shearability	255

By delivery stateSoft annealedsource steelnumber

Delivery state	HB
Soft annealed	241

By dimensionQuenching and drawingsource splav

Dimensionmm	RmN/mm²	ReN/mm²	A5%	Z%	KCUkJ/m²
Ø 25	650	390	13	40	390

At temperatureno delivery state statedsource splav

Temperature°C	Densityg/cm³	Elastic modulusGPa	Thermal expansion coefficient10^-6/K	Thermal conductivityW/(m·K)	Specific heat capacityJ/(kg·K)
20	7.81	216	—	43	—
100	—	213	11.8	42	487
200	—	208	12.5	41	500
300	—	199	13.2	38	517
400	—	185	13.8	36	533
500	—	174	14.3	34	559
600	—	160	14.8	31	584
700	—	142	15.1	29	609
800	—	130	12.3	28	676

6 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.

Similar grades — and why

Selection rule, stated so you can disagree with it: same number class 1.7, a shared category, and a published range for Cr / Mn 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.

28Cr41.7030

Cr 0,90-1,20 · Mn 0,60-0,90